MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Lasers in Medical Science' source. Sun, 21 Mar 2010 17:09:50 +0100 http://www.medworm.com/index.php?rid=3373708&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fn2m15m3016577p20%2F Abstract  The aim of this work is to validate the clinical efficacy of the high-power holmium:YAG laser with percutaneous nephrolithotripsy (PCNL) in combination with ultrasound lithotripsy for complicated renal calculi. From November 2006 to December 2007, 60 patients with complicated renal calculi were treated with PCNL, where an F24 standard renal access tract was established by percutaneous renal puncture under the guidance of B-mode ultrasound, and stones were fragmented and cleared by high-power holmium laser in combination with ultrasound under an F20.8 nephroscope. Of the 60 patients with complicated renal calculi, 20 were complete staghorn calculi and 30 were partial staghorn calculi, of which six patients were accompanied with renal insufficiency; two were solitar... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3373708 Mon, 15 Mar 2010 17:56:12 +0100 3373708 http://www.medworm.com/index.php?rid=3373707&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ff8jm138pv12v4762%2F Abstract  The aim of this study was to evaluate the effects of the photosensitizers Rose Bengal and erythrosin combined with a light-emitting diode (LED) on Enterobacteriaceae. Twelve Enterobacteriaceae strains isolated from the oral cavities of patients undergoing prolonged antibiotic therapy, including three Escherichia coli, three Enterobacter cloacae, three Klebsiella oxytoca and three Klebsiella pneumoniae, were studied. An Enterobacteriaceae suspension (106 cells/ml) was prepared from each clinical strain isolated from the human oral cavity and subjected to the following treatments: LED and Rose Bengal, LED and erythrosin, LED and physiological solution, and physiological solution only as control. A blue LED unit (460 nm), and Rose Bengal and erythrosin at a concen... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3373707 Mon, 15 Mar 2010 17:56:12 +0100 3373707 http://www.medworm.com/index.php?rid=3362121&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fe8k817631883w527%2F This study aimed to evaluate a laser fluorescence device (the DIAGNOdent) and a visual classification system (ICDAS-II) for occlusal caries diagnosis. It also aimed to determine whether fluorescence measurements taken at the tooth surface correlate with the fluorescence measurements taken within the body of the lesion. The occlusal surfaces of 100 extracted permanent teeth were examined using ICDAS-II and DIAGNOdent (LF-tooth). Serial sections were made and lesion depth was assessed histologically. DIAGNOdent readings were also taken from the sections (LF-section). There were significant positive strong correlations between ICDAS-II and histology (rS = 0.71) and LF-section and histology (rS = 0.70), and only moderate correlations between LF-tooth and histology (rS = 0.51) ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3362121 Thu, 11 Mar 2010 02:49:56 +0100 3362121 http://www.medworm.com/index.php?rid=3362122&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F6lq016203u887843%2F We examined the clinical appearance of mucosal venous malformations of the upper aerodigestive tract with regard to their accessibility to laser therapy and further assessed the value of treatment of these lesions with the Nd:YAG and CO2 lasers. A retrospective study was performed in 50 patients who had undergone laser treatment for mucosal low-flow vascular malformations of the upper aerodigestive tract. Records were reviewed for demographic data, extent of the lesion, treatment modality, required number of therapy sessions and the therapeutic outcome. Follow-up was performed by postinterventional clinical examination and additional interview by phone for current status. Between 1 July 2001 and 30 September 2008 32 women and 18 men received laser treatment and were followed up until ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3362122 Wed, 10 Mar 2010 18:27:47 +0100 3362122 http://www.medworm.com/index.php?rid=3315965&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F975v83t370656153%2F Abstract  Although the use of high-level Er:YAG laser irradiation has been increasing in periodontal and peri-implant therapy, the effects of low-level Er:YAG laser on surrounding tissues and cells remain unclear. In the present study, the effects of low-level Er:YAG laser irradiation on osteoblast proliferation were investigated. Cells of the osteoblastic cell line MC3T3-E1 were treated with low-level Er:YAG laser irradiation with various combinations of laser settings (fluence 0.7–17.2 J/cm2) and in the absence or presence of culture medium during irradiation. On day 1 and/or day 3, cell proliferation and death were determined by cell counting and by measurement of lactate dehydrogenase (LDH) levels. Further, the role of mitogen-activated protein kinase (MAPK) pathw... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3315965 Thu, 25 Feb 2010 17:55:52 +0100 3315965 http://www.medworm.com/index.php?rid=3311011&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fj144062459180x08%2F Abstract  The use of confocal laser scanning microscopy (CLSM) may be an eligible alternative for confirmation of the diagnosis of hypopigmented macules. Our purpose was to evaluate CLSM features for non-invasive imaging of vitiligo, nevus depigmentosus and postinflammatory hypopigmentation in vivo. A total of 68 patients with a clinical diagnosis of the aforementioned diseases were included in this study. CLSM was performed on lesional and adjacent normal appearing skin for all patients. In the active and stable phases of vitiligo, CLSM demonstrated a complete loss of melanin in lesional skin in 14 of 25 patients (56.0%) and 16 of 20 patients (80.0%), respectively. In 11 of 25 (44.0%) patients, the amount of melanin in lesional skin decreased in the active phase of vitilig... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3311011 Wed, 24 Feb 2010 06:50:00 +0100 3311011 http://www.medworm.com/index.php?rid=3297893&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ff33107387u963427%2F Abstract  Experiments were carried out on cancerous HeLa cells and blood serum using a double integrating sphere and a He-Ne laser to investigate the optical properties and cellular effects due to photodynamic therapy (PDT). In the first experiment, HeLa cells were exposed to Photofrin at concentrations of 0, 10, 20, 30, 50 and 112.4 Âµg/ml at an irradiance of 0.2 W/cm2 using diode laser light. Using a confocal microscope, cell debris and morphological changes in HeLa cells were recorded at different Photofrin concentrations. The results showed cell debris in HeLa cells at the highest concentration of Photofrin. In a second experiment, photobleaching was observed in HeLa cells in the presence of various concentrations of 5-aminolaevulinic acid ranging from 0–50&n... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3297893 Sat, 20 Feb 2010 06:52:03 +0100 3297893 http://www.medworm.com/index.php?rid=3283128&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fp741887827178wt7%2F Abstract  A biopsy is a surgical procedure performed to establish a clear diagnosis of a lesion in order to clarify a clinical diagnostic suspicion. During a biopsy procedure it is fundamental to maintain safe and readable cut margins in order to permit histological visualization of possible marginal infiltrations or malignant transformation of a lesion. The aim of this study was to evaluate the histological peripheral damage caused by application of a KTP (potassium titanium phosphate) laser during oral soft tissue biopsy procedures. A KTP laser (λ 532 nm) at different power settings and fluences was used to obtain 45 samples from pig cadaver tongues. The samples were then subdivided into five groups of nine samples each. A final specimen was taken by scalpel as a co... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3283128 Tue, 16 Feb 2010 18:06:57 +0100 3283128 http://www.medworm.com/index.php?rid=3283130&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F738q211340gw5278%2F Abstract  The aim of this in vitro study was to compare the microleakage of repaired class V resin composite restorations prepared either by Er:YAG laser or a diamond bur. Ninety-six intact human molar teeth were randomly distributed into eight groups. In the first four groups, class V cavities (3 × 3 × 3 mm) prepared on the buccal and lingual surfaces of the teeth using an erbium:yttrium-aluminum-garnet laser (VersaWave, HOYA ConBio, Japan). Similar class V cavities were prepared in the second four groups using a diamond bur (S-Class, Komet, UK). Teeth in groups 1, 2, and 5, 6 were restored with a nano-ceramic composite (Ceram.X duo, DENTSPLY), whereas a silorane material (Filtek Silorane, 3M ESPE) was used to restore cavities in groups 3, 4, and 7, 8. Two different adhe... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3283130 Tue, 16 Feb 2010 18:06:56 +0100 3283130 http://www.medworm.com/index.php?rid=3283129&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ff8403t83h1317246%2F Abstract  Irradiation by light emitting diode (LED) promotes fibroblast proliferation and wound healing. However, its mechanism is still unknown. The purpose of this study was to clarify the mechanism of fibroblast proliferation by LED irradiation. Cultured NIH3T3 fibroblasts from normal mice were irradiated by LED with a center wavelength of 627 nm. LED irradiation was performed with an energy density of 4 J/cm2, at subculture and 24 h later. The expression of several growth factors and their receptors was analyzed by reverse transcriptase-polymerase chain reaction (RT-PCR): platelet-derived growth factor (PDGF)-A, PDGF-B, and PDGF-C, transforming growth factor-beta (TGF-β), basic fibroblast growth factor (bFGF), PDGF-α receptor, and TGF-β receptor. Then, ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3283129 Tue, 16 Feb 2010 18:06:56 +0100 3283129 http://www.medworm.com/index.php?rid=3279515&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fvpqk8p0332lj2214%2F In conclusion, the FC showed high reliability for occlusal and smooth surfaces, similar to the other fluorescence methods tested. Additionally, prolonged air drying increased the FC measurements. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-010-0757-1Authors Monique Saveriano De Benedetto, Faculdade de Odontologia da Universidade de São Paulo Department of Pediatric Dentistry São Paulo BrazilCaroline Carvalho Morais, Faculdade de Odontologia da Universidade de São Paulo Department of Pediatric Dentistry São Paulo BrazilTatiane Fernandes Novaes, Faculdade de Odontologia da Universidade de São Paulo Department of Pediatric Dentistry São Paulo BrazilJonas de Almeida Rodrigues, University of Bern School of Dental Medicine Bern SwitzerlandMariana Minatel B... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3279515 Mon, 15 Feb 2010 18:00:33 +0100 3279515 http://www.medworm.com/index.php?rid=3275461&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fpn179w82426m7157%2F Content Type Journal ArticleCategory Letter to the editorDOI 10.1007/s10103-009-0748-2Authors Rita Guedes, Centro Hospitalar de Vila Nova de Gaia Dermatology Department Rua Conceição Fernandes 4430 Vila Nova de Gaia PortugalLuiz Leite, Clínica Laser de Belém Dermatology Department Calçada da Ajuda, 72B 1300 Lisbon Portugal Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3275461 Sat, 13 Feb 2010 06:48:11 +0100 3275461 http://www.medworm.com/index.php?rid=3270956&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fl213761253780r40%2F Abstract  The aim of this study was to investigate the shear bond strength of bonding to enamel following laser etching with the Er:YAG or Er,Cr:YSGG laser using different irradiation distances. Of 99 extracted human premolar teeth, 90 were divided equally into nine groups. In the control group (group A) the teeth were etched with 38% phosphoric acid. In the laser groups (groups B–I) the enamel surface of the teeth was laser-irradiated, groups B–E with the Er:YAG laser and groups F–I with the Er,Cr:YSGG laser at distances of 1, 2, 4 and 6 mm, respectively. The shear bond strengths were tested using a universal testing machine. The shear bond strengths associated with the Er:YAG laser at 4 and 6 mm and the Er,Cr:YSGG laser at 2, 4 and 6 mm were significan... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3270956 Fri, 12 Feb 2010 07:09:28 +0100 3270956 http://www.medworm.com/index.php?rid=3270957&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fh670p302543wh914%2F Abstract  In vitro studies have provided conflicting evidence of temperature changes in the tooth pulp chamber after low-level laser irradiation of the tooth surface. The present study was an in vitro evaluation of temperature increases in the human tooth pulp chamber after diode laser irradiation (GaAlAs, λ = 808 nm) using different power densities. Twelve human teeth (three incisors, three canines, three premolars and three molars) were sectioned in the cervical third of the root and enlarged for the introduction of a thermocouple into the pulp chamber. The teeth were irradiated with 417 mW, 207 mW and 78 mW power outputs for 30 s on the vestibular surface approximately 2 mm from the cervical line of the crown. The highest average increas... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3270957 Thu, 11 Feb 2010 11:48:56 +0100 3270957 http://www.medworm.com/index.php?rid=3266510&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fwg7l86h541318q7m%2F In conclusion, we found strong evidence that all EVLA procedures in blood filled veins deposit a heavily absorbing hot layer of carbonized blood on the fibre tip, with concomitant tip damage. This major EVLA mechanism is unlikely to have much wavelength dependence at similar delivered energies per centimetre of vein. Optical–thermal interaction between the vein wall and the transmitted laser light depends on wavelength. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0749-1Authors Mustafa Amzayyb, University of Amsterdam Department of Biomedical Engineering & Physics, Academic Medical Centre Meibergdreef 9 1105 AZ Amsterdam The NetherlandsRenate R. van den Bos, Erasmus Medical Centre Department of Dermatology Rotterdam The NetherlandsVitali M. Kodach, ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3266510 Wed, 10 Feb 2010 06:47:54 +0100 3266510 http://www.medworm.com/index.php?rid=3266511&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm87tp627p6873j6u%2F In this study a realistic head model generated from structure data from magnetic resonance imaging (MRI) was introduced into a three-dimensional Monte Carlo code and the sensitivity of functional near-infrared measurement was analysed. The effects of the distance between source and detector, and of the optical properties of the probed tissues, on the sensitivity of the optical measurement to deep layers of the adult head were investigated. The spatial sensitivity profiles of photons in the head, the so-called banana shape, and the partial mean optical path lengths in the skin-scalp and brain tissues were calculated, so that the contribution of different parts of the head to near-infrared spectroscopy signals could be examined. It was shown that the signal detected in brain function ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3266511 Mon, 08 Feb 2010 17:30:54 +0100 3266511 http://www.medworm.com/index.php?rid=3248470&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F7gn632x80158h247%2F Abstract  Peripheral nerves are structures that, when damaged, can result in significant motor and sensory disabilities. Several studies have used therapeutic resources with the aim of promoting early nerve regeneration, such as the use of low-power laser. However, this laser therapy does not represent a consensus regarding the methodology, thus yielding controversial conclusions. The objective of our study was to investigate, by functional evaluation, the comparative effects of low-power laser (660 nm and 830 nm) on sciatic nerve regeneration following crushing injuries. Twenty-seven Wistar rats subjected to sciatic nerve injury were divided into three groups: group sham, consisting of rats undergoing simulated irradiation; a group consisting of rats subjected to... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3248470 Fri, 05 Feb 2010 07:02:02 +0100 3248470 http://www.medworm.com/index.php?rid=3243242&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fp62856jt72961466%2F Abstract  The high intensity diode laser has been studied in periodontics for the reduction of subgingival bacteria in non-surgical treatment. Our study evaluated the bacterial effect as well as changes in periodontal clinical parameters promoted by root scaling and planing associated with this wavelength. Twenty-seven patients randomly assigned in two groups underwent root scaling and planing on the tested sites, and only the experimental group received the diode laser irradiation. Among the clinical parameters studied, the clinical probing depth (CPD) and the clinical attachment level (CAL) resulted in significant enhancement in the control group when compared with the experimental group (P = 0.014 and P = 0.039, respectively). The results were similar for both gro... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3243242 Wed, 03 Feb 2010 17:54:03 +0100 3243242 http://www.medworm.com/index.php?rid=3235350&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fktg6821p7n182280%2F Abstract  Attempts have been made to treat dentinal hypersensitivity by sealing exposed dentinal tubules, and the carbon dioxide (CO2) laser has been shown to have a sealing effect on dentinal surfaces. The purpose of this study was to analyze the morphological ultra-structure and temperature change after CO2 laser irradiation of dentin. Fourteen human third molars were selected and cleaned. An area was delimited, and the samples were randomly divided into seven groups: Group 1 (G1): control; G2, calcium hydroxide paste (CA) + CO2 laser (L) (0.5 W/63,69 W/cm2); G3, CA + L (1 W/125,38 W/cm2); G4, CA + L (1.5 W/191,08 W/cm2); G5, L (0.5 W); G6, L (1 W); G7, L (1.5 W). All irradiation was performed in unfocused mode. The electro... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3235350 Mon, 01 Feb 2010 18:04:17 +0100 3235350 http://www.medworm.com/index.php?rid=3207884&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc87787uk34uu348w%2F In conclusion, LF readings for occlusal caries detection in primary molars were significantly affected by both the clear and the opaque materials. However, the effect for the opaque material was more pronounced. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0745-5Authors Elina Askaroglou, University of Athens Department of Paediatric Dentistry, School of Dental Medicine Athens GreeceKaterina Kavvadia, University of Athens Department of Paediatric Dentistry, School of Dental Medicine Athens GreecePanagiotis Lagouvardos, University of Athens Department of Restorative Dentistry, School of Dental Medicine Athens GreeceLisa Papagiannoulis, University of Athens Department of Paediatric Dentistry, School of Dental Medicine Athens Greece Journal Lasers in... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3207884 Sat, 23 Jan 2010 07:42:44 +0100 3207884 http://www.medworm.com/index.php?rid=3197270&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F763140013g37l46r%2F Abstract  Reflectance spectrophotometry is the most established and widely used objective technique for the assessment of port-wine stain (PWS) skin, and has been applied extensively in other dermatological applications. To date, no review has been published regarding the different spectrophotometric devices used on PWS skin. This paper comprises such a review, introducing the reader to the relevant background material and then discussing scanning, narrow-band and tristimulus spectrophotometers in turn. Scanning spectrophotometry is the most versatile of the three methods but it is noted that considerable expertise is required to interpret the acquired data. Narrow-band and tristimulus devices are available at a much lower price and can be considerably simpler to use. They ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3197270 Wed, 20 Jan 2010 06:44:52 +0100 3197270 http://www.medworm.com/index.php?rid=3197271&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F23x760x667772u04%2F Abstract  The aim of this study was to evaluate the mineral content of dentin prepared using an Er,Cr:YSGG laser at four different power settings, acid etching, and air abrasion. The study teeth comprised 35 molars which were randomly divided into seven equal groups. The occlusal third of the crowns were cut with a slow-speed diamond saw. The groups were as follows: group A, control group; group B, dentin etched with 35% buffered phosphoric acid for 30 s; group C, dentin abraded at 60 psi with 50-µm aluminium oxide for 1 s; groups D–G, dentin irradiated with the Er,Cr:YSGG laser at 1.50 W (group D), 2.25 W (group E), 3.00 W (group F), and 3.50 W (group G). The levels of Mg, P, Ca, K and Na in each dentin slab were measured by inductively... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3197271 Mon, 18 Jan 2010 18:47:14 +0100 3197271 http://www.medworm.com/index.php?rid=3106632&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F1w2u87rt17u8212n%2F Abstract  Several antimicrobial strategies have been proposed in response to the alarming rise in antimicrobial resistance of periodontal pathogens. Antimicrobial photodynamic therapy (a-PDT) is a promising novel approach that has been used in several clinical applications including in the treatment of periodontal diseases. The aim of this review was to systematically investigate the effectiveness of a-PDT as an adjuvant treatment for chronic periodontitis. The guidelines of the Quality of Reporting of Meta-analyses (QUOROM) conference statement were followed in the preparation of this meta-analysis. An electronic search for randomized controlled trials (RCTs) that investigated the combined use of scaling and root planing (SRP) and a-PDT in comparison with SRP alone was per... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3106632 Fri, 18 Dec 2009 16:41:34 +0100 3106632 http://www.medworm.com/index.php?rid=3106633&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu0r75rj413153631%2F Abstract  The purpose of the study was to determine if the irradiation of enamel with laser of different output powers might be viable alternatives to acid etching for the bonding of resin luting agents. Seventy-seven maxillary central incisors, extracted for periodontal reasons, were used. The enamel was etched with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser operated at one of six power outputs (0.5 W, 0.75 W, 1 W, 1.5 W, 1.75 W and 2 W) or with 38% phosphoric acid. Seventy teeth were used for the bond strength experiments, and the remaining seven (one specimen for each group) were used for scanning electron microscopy (SEM) to determine the topography and morphology of the treated enamel surface. The acid-etch... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3106633 Thu, 17 Dec 2009 07:04:19 +0100 3106633 http://www.medworm.com/index.php?rid=3100050&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fe716842l83861371%2F The objective of this study was to test the enhancement in the efficacy of PWS treatment with PDL and Serenity Pro while vacuum is being utilized in the non-contact, blood-enrichment mode. Fifteen patients with resistant PWS underwent 1–4 treatments (interval of 5–20 weeks) under general anesthesia with a 595-nm PDL at 10–14 J/cm2, 1.5–3 ms pulse duration, and 7-mm spot size. Lesion blanching with DCD chilling and with vacuum were photographed and compared. Better blanching of various degrees was observed on resistant PWS with the blood-enrichment technique in seven out of 11 patients who returned for follow-up. There were no cases of decrease in efficacy. Blood enrichment with the Serenity Pro non-contact vacuum technology has the potential of enhancing the capabili... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3100050 Tue, 15 Dec 2009 06:49:30 +0100 3100050 http://www.medworm.com/index.php?rid=3078710&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg5164020545w5426%2F Abstract  Plasma-mediated laser ablation and dissection of freeze-dried human dermis using an ultrashort pulsed laser of pulse width 900 fs and wavelength 1,552 nm were investigated. The surface ablation line width and depth in relation to irradiation fluence and pulse overlap rate were characterized and measured by scanning electron microscopy. The ablation threshold fluence for freeze-dried dermis was determined as 8.32 J/cm2 and the incubation factor subject to pulse train irradiation was found to be 0.54. Histological examination showed no thermal damage with single line ablation. Even with multiline ablation, thermal damage was insignificant and the lateral damage zone was generally within 10 Âµm with 100 continuously repeated line scans. Ultrashort ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3078710 Tue, 08 Dec 2009 06:46:52 +0100 3078710 http://www.medworm.com/index.php?rid=3066534&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb850n4q53412476w%2F Abstract  Nanoparticles formulated from the biodegradable copolymer poly(lactic-coglycolic acid) (PLGA) were investigated as a drug delivery system to enhance tissue uptake, permeation, and targeting of zinc(II) phthalocyanine (ZnPc) for photodynamic therapy. Three ZnPc nanoparticle formulations were prepared using a solvent emulsion evaporation method and the influence of sonication time on nanoparticle shape, encapsulation and size distribution, in vitro release, and in vivo photodynamic efficiency in tumor-bearing mice were studied. Sonication time did not affect the process yield or encapsulation efficiency, but did affect significantly the particle size. Sonication for 20 min reduced the mean particle size to 374.3 nm and the in vitro release studies demonstr... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3066534 Thu, 03 Dec 2009 12:50:06 +0100 3066534 http://www.medworm.com/index.php?rid=3022543&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ft02423htt6835718%2F Abstract  As the American Academy of Periodontology indicates, the treatment of chronic periodontitis should be achieved in the least invasive manner through non-surgical periodontal therapy. However, complete removal of subgingival plaque and calculus is hindered with increasing probing depth (PD) and furcation involvement using hand, sonic or ultrasonic instruments. Many authors have suggested that the use of laser as an adjunct to scaling and root planing (SRP) might improve the effectiveness of conventional periodontal treatment. The aim of this study was to evaluate potassium–titanyl–phosphate (KTP) laser in non-surgical periodontal therapy. Seven hundred and thirty sites with probing depths of 4–6 mm were involved in the study. The sites were divided into f... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3022543 Sat, 21 Nov 2009 08:29:35 +0100 3022543 http://www.medworm.com/index.php?rid=3011895&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fv7h8292038n30276%2F Abstract  The skin closure abilities of near infrared lasers and suturing were compared by histological examination and mechanical tensile tests during a 21-day healing period. One-centimeter incisions on the dorsal skin of Wistar rats were treated by one of the closing techniques: (a) soldering, using an 809 nm diode laser (0.5 W, 5 s) with 25% bovine serum albumin (BSA) and 2.5 mg/ml indocyanine green (ICG); (b) direct welding with a 980 nm diode laser (0.5 W, 5 s); (c) direct welding with a 1,070 nm fiber laser (0.5 W, 5 s); (d) suturing. Six spots (79.61 J/cm2 for each spot) were applied through the incisions. Healing was inspected on the 1st, 4th, 7th, 14th, and 21st post-operative days. The closure index (CI), ther... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3011895 Tue, 17 Nov 2009 23:47:10 +0100 3011895 http://www.medworm.com/index.php?rid=2923022&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm76uq0565gk31047%2F Content Type Journal ArticleDOI 10.1007/s10103-009-0735-7 Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 24 Journal Issue Volume 24, Supplement 1 / October, 2009 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2923022 Thu, 22 Oct 2009 05:58:22 +0100 2923022 http://www.medworm.com/index.php?rid=2919605&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fv422806n6802847u%2F Abstract  The aim of this study was to investigate the effect of low-level laser therapy (LLLT) on plantar fasciitis documented by the ultrasonographic appearance of the aponeurosis and by patients’ pain scores. Thirty individuals with diagnosis of unilateral plantar fasciitis were enrolled in a randomized, double-blind, placebo-controlled trial, but 25 participants completed the therapeutic protocol. The contralateral asymptomatic fascia was used as control. After enrolment, symptomatic individuals were randomly assigned to receive LLLT, or identical placebo, for 6 weeks. Ultrasonography was performed at baseline and after completion of therapy. The subjective subcalcaneal pain was recorded at baseline and after treatment on a visual analogue scale (VAS). After LLLT... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2919605 Wed, 21 Oct 2009 02:55:38 +0100 2919605 http://www.medworm.com/index.php?rid=2879169&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fx021075g0rg18646%2F Abstract  The purpose of this study was to identify systematic reviews (SRs) that compared laser with other dental restorative procedures and to evaluate their methodological quality. A search strategy was developed and implemented for MEDLINE, the Cochrane Library, LILACS, and the Brazilian Dentistry Bibliography (1966–2007). Inclusion criteria were: the article had to be an SR (± meta-analysis); primary focus was the use of laser in restorative dentistry; published in English, Spanish, Portuguese, Italian, German. Two investigators independently selected and evaluated the SRs. The overview quality assessment questionnaire (OQAQ) was used to evaluate methodological quality, and the results were averaged. There were 145 references identified, of which seven were SRs... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2879169 Thu, 08 Oct 2009 06:55:48 +0100 2879169 http://www.medworm.com/index.php?rid=2865234&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F9373714311471678%2F The objective of this study was to evaluate the influence of various pulse widths with different energy parameters of erbium:yttrium–aluminum–garnet (Er:YAG) laser (2.94 Î¼m) on the morphology and microleakage of cavities restored with composite resin. Identically sized class V cavities were prepared on the buccal surfaces of 54 bovine teeth by high-speed drill (n = 6, control, group 1) and prepared by Er:YAG laser (Fidelis 320A, Fotona, Slovenia) with irradiation parameters of 350 mJ/ 4 Hz or 400 mJ/2 Hz and pulse width: group 2, very short pulse (VSP); group 3, short pulse (SP); group 4, long pulse (LP); group 5, very long pulse (VLP). All cavities were filled with composite resin (Z-250-3 M), stored at 37°C in distilled water, polished after 2... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2865234 Sun, 04 Oct 2009 05:42:17 +0100 2865234 http://www.medworm.com/index.php?rid=2851046&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fx310817uwr042842%2F Abstract  The purpose of this clinical study was to examine nonsurgical treatments of periodontal disease comparing a diode laser to subgingival curettage with conventional hand instruments. The study group comprised 18 patients with moderate periodontal degradation who were treated without local anesthesia. Each quadrant was randomly allocated in a split-mouth design either to treatment with a 810-nm diode laser using an energy of 2 W (test group) or to gingival curettage using hand instruments (control group). Clinical data, including plaque index (PI), gingival index (GI), sulcus bleeding index (SBI), pocket depth (PD), clinical attachment level (CAL) and visual analog scale (VAS) score were acquired prior to and 4 weeks after treatment. The treatment time for ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2851046 Tue, 29 Sep 2009 16:56:04 +0100 2851046 http://www.medworm.com/index.php?rid=2851047&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fe132727417k08234%2F Abstract  The novel concept of non-ablative fractional photothermolysis was introduced to the market in 2003 as an answer to the need for effective, yet low risk, resurfacing techniques. Unlike conventional ablative and non-ablative lasers, fractional ablative and non-ablative photothermolysis treats only a fraction of the skin, leaving up to a maximum of 95% of the skin uninvolved. The undamaged surrounding tissue allows for a reservoir of viable tissue, permitting rapid epidermal repair. Non-ablative fractional photothermolysis is currently approved by the US Food and Drug Administration (FDA) for the treatment of pigmented lesions, periorbital rhytides, skin resurfacing, melasma and soft tissue coagulation, acne and surgical scars, and actinic keratoses. However, its off... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2851047 Tue, 29 Sep 2009 07:33:03 +0100 2851047 http://www.medworm.com/index.php?rid=2851048&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F48m14313k1748n14%2F Abstract  The aim of this study was to compare the in situ and in vitro performances of a laser fluorescence (LF) device (DIAGNOdent 2095) with visual inspection for the detection of occlusal caries in permanent teeth. Sixty-four sites were selected, and visual inspection and LF assessments were carried out, in vitro, three times by two independent examiners, with a 1-week interval between evaluations. Afterwards, the occlusal surfaces were mounted on the palatal portion of removable acrylic orthodontic appliances and placed in six volunteers. Assessments were repeated and validated by histological analysis of the tooth sections under a stereomicroscope. For both examiners, the highest intra-examiner values were observed for the visual inspection when in vitro and in situ e... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2851048 Tue, 29 Sep 2009 01:06:08 +0100 2851048 http://www.medworm.com/index.php?rid=2812183&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu663p8714jq3266j%2F Abstract  The purpose of this in vitro study was to compare the effects of a self-etch adhesive system and neodymium:yttrium–aluminum–garnet (Nd:YAG) laser application on the dentinal permeability of the furcation area of primary molars. After endodontic access, 39 extracted human deciduous molars were divided into three groups: control group (CG), no treatment; adhesive group (AG), self-etching adhesive was applied to the furcation area; laser group (LG), specimens were irradiated with Nd:YAG laser. To evaluate dentin permeability of the furcation area, we immersed the specimens in 0.5 % methylene blue dye for 4 h. Then, they were longitudinally sectioned into two halves and photographed. The images were analyzed by two qualified evaluators using TpsDig software t... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2812183 Thu, 17 Sep 2009 23:28:33 +0100 2812183 http://www.medworm.com/index.php?rid=2812184&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb62w04872451582k%2F Abstract  The early detection of cutaneous pigmented lesions is an important aid to the clinician in recognizing malignant melanoma. In an attempt to correlate the depth of a pigmented skin lesion with its malignant potential, phantoms able to simulate the diffuse reflectance of some lesions of different thicknesses were manufactured and tested to validate a diagnostic instrument developed in-house. Such optical skin-tissue phantoms may be useful for accelerating and optimizing the diagnosis of suspicious lesions of the skin. In fact, benign melanocytic lesions are different in terms of their diffuse reflectance from melanoma. The diffuse reflectance of pigmented skin lesions depends on the amount and distribution of the absorbing/diffusing chromophores embedded in the skin... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2812184 Thu, 17 Sep 2009 23:28:28 +0100 2812184 http://www.medworm.com/index.php?rid=2812185&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb1212687h272vv19%2F Abstract  Optical coherence tomography (OCT) was used to determine optical properties of pelleted human fibroblasts in which necrosis or apoptosis had been induced. We analysed the OCT data, including both the scattering properties of the medium and the axial point spread function of the OCT system. The optical attenuation coefficient in necrotic cells decreased from 2.2 ± 0.3 mm−1 to 1.3 ± 0.6 mm−1, whereas, in the apoptotic cells, an increase to 6.4 ± 1.7 mm−1 was observed. The results from cultured cells, as presented in this study, indicate the ability of OCT to detect and differentiate between viable, apoptotic, and necrotic cells, based on their attenuation coefficient. This functional supplement to high-resolution OCT imaging can be ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2812185 Tue, 15 Sep 2009 21:41:13 +0100 2812185 http://www.medworm.com/index.php?rid=2812186&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F356r77470760g013%2F We report on three patients with implants in the anterior area who were operated on under the above conditions. Traditionally, the tissue overlying the implants is removed and eliminated. In seeking a way to preserve the attached gingiva, we raised a trapezoidal flap, uncovering each implant and allowing apical repositioning and transpositioning of keratinized gingiva to the buccal side. The results obtained were compared with those from other patients operated on by conventional scalpel. The erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser minimized postoperative pain, and the time to prosthetic rehabilitation was also shortened. The esthetic results were far superior, and no complications were recorded. Content Type Journal ArticleCategory Brief ReportDO... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2812186 Tue, 15 Sep 2009 21:41:12 +0100 2812186 http://www.medworm.com/index.php?rid=2768421&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F2j3v78351w714062%2F Abstract  The optical properties of the skin (absorption coefficient, scattering coefficient, refractive index) may serve to characterize the skin and are important for correct light dosimetry in many optical diagnostic procedures and laser treatments especially photodynamic therapy and laser therapy. We determined in vivo the optical properties of tissues near the wrist, elbow and knee in subjects of different ages using diffuse reflectance spectroscopy, having in view the establishment of laser system types for the laser treatment of posttraumatic lesions in subjects of different ages. Diffuse reflection of light from biological tissue is due to the variation in refractive index of tissular and cellular components and the surrounding medium and depends on the wavelength o... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2768421 Thu, 03 Sep 2009 06:32:25 +0100 2768421 http://www.medworm.com/index.php?rid=2768422&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F9244672553wk1055%2F Abstract  Laser endodontic tips appear to provide a promising alternative to available treatment modalities in the field of endodontology. With the shortcomings in published results regarding the intra-canal behavioural aspects of those tips, it was the aim of this study to investigate the extent of the intra-canal ablation zone and the pattern associated with those tips. Ninety intact extracted bovine teeth were used to prepare mid-root testing cylinders. The samples were divided into three groups (A, B, C), corresponding to the tip diameters. Each group was further subdivided to be irradiated at three different power settings (1500 mW, 1750 mW, 2000 mW) with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser with a 65% water to 35%... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2768422 Thu, 03 Sep 2009 06:32:24 +0100 2768422 http://www.medworm.com/index.php?rid=2733664&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fw1800w608258113p%2F Abstract  Protoporphyrin IX (PpIX) is the photosensitizer in 5-aminolaevulinic acid (ALA)-based photodynamic therapy (PDT). Its further bioconversion to heme requires iron and can be suppressed by iron chelators such as desferrioxamine (DFO). To investigate the effectiveness of DFO in enhancing PpIX-based PDT in skin tissue, we selected fibroblasts, HaCat cells and Hep-2 cells as targets co-cultured with ALA, that have different biological characteristics for PpIX conversion. Evaluated interventions included: (1) blank control (no ALA, no DFO); (2) DFO alone; (3) ALA alone; and (4) DFO in combination with ALA. Before photodynamic irradiation, cellular PpIX level and fluorescence were measured. After irradiation, cell death ratio was calculated and morphological changes in t... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2733664 Mon, 24 Aug 2009 16:55:00 +0100 2733664 http://www.medworm.com/index.php?rid=2719297&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb4q3761408420124%2F Abstract  The purpose of this study was to investigate shear bond strength (SBS) between a light-curing nano-ionomer restorative and enamel or dentin after acid etching, after erbium:yttrium–aluminum–garnet (Er:YAG) laser etching, or after combined treatment. Forty third molars were selected, the crowns were sectioned, and 80 tooth slabs were obtained. The specimens were assigned to two groups, which were divided into four subgroups(n = 10). Group 1 [enamel (e)], treated with 37% phosphoric acid (A) + Ketac nano-primer (K); group 2 [dentin (d)], (A) + (K); group 3(e), Er:YAG laser etching (L) + (A) + (K); group 4(d), (L) + (A) + (K); group 5(e), (L) + (K); group 6(d), (L) + (K); group 7(e), ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2719297 Tue, 18 Aug 2009 09:42:39 +0100 2719297 http://www.medworm.com/index.php?rid=2708541&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fv056331522210028%2F Abstract  The purpose of this study was to compare the tensile bond strength of composite resin bonded to erbium:yttrium–aluminium–garnet (Er:YAG) laser-prepared dentine after different durations of acid etching. The occlusal third of 68 human third molars was removed in order to expose the dentine surface. The teeth were randomly divided into five groups: group B (control group), prepared with bur and total etch system with 15 s acid etching [37% orthophosphoric acid (H3PO4)]; group L15, laser photo-ablated dentine (200 mJ) (laser irradiation conditions: pulse duration 100 µs, air–water spray, fluence 31.45 J/ cm2, 10 Hz, non-contact hand pieces, beam spot size 0.9 mm, irradiation speed 3 mm/s, and total irradiation time 2 x 40 s);... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2708541 Sat, 15 Aug 2009 08:59:06 +0100 2708541 http://www.medworm.com/index.php?rid=2701919&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F5004417037132071%2F Abstract  The aim of the study was to compare the histological results after complete osteotomies of the sheep tibia using either the prototype carbon dioxide (CO2) laser osteotome ‘OsteoLAS’ (n = 12) or an oscillating saw (n = 12). The laser parameters were as follows: wavelength 10.6 Âµm; energy of laser pulses 75–85 mJ; pulse duration 80 Î¼s; pulse repetition rate 200 Hz; spot diameter 460 Î¼m (1/e2 level); radiant exposure 45–51 J/cm2; peak irradiance 0.56–0.64 MW/cm2. Both groups were divided into two subgroups (n = 6), and the animals were killed after 4 weeks or 12 weeks, respectively. Light and fluorescence microscopy with semiquantitative analysis and histomorphometry were performed to compare bone hea... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2701919 Wed, 12 Aug 2009 15:10:36 +0100 2701919 http://www.medworm.com/index.php?rid=2701920&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fl8770tjk56887gh1%2F Abstract  The aim of this in vitro study was to evaluate the effect of erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser pretreatment alone, or associated with acid etching, on the quality of marginal integrity (microleakage and marginal gap) of a resin-based fissure sealant in primary teeth. Fifty sound primary molar teeth were randomly assigned to one of five study groups, pretreated as follows: (1) 35% orthophosphoric acid etching; (2) 2.5 W laser etching; (3) 3.5 W laser etching; (4) 2.5 W laser + 35% orthophosphoric acid etching; (5) 3.5 W laser + 35% orthophosphoric acid etching. After surface pretreatment, a resin-based sealant (ClinPro) was applied to the fissures. Sample teeth were then subjected to thermocycling and store... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2701920 Wed, 12 Aug 2009 15:10:34 +0100 2701920 http://www.medworm.com/index.php?rid=2699114&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc003254183546q34%2F This study represents an in vivo indication that this treatment should be further considered as an effective alternative to therapeutic regimens for herpes labialis lesions. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0717-9Authors Renata Rodrigues de Carvalho, University of São Paulo Special Laboratory of Lasers in Dentistry, Department of Restorative Dentistry, School of Dentistry São Paulo SP BrazilFernanda de Paula Eduardo, University of São Paulo Special Laboratory of Lasers in Dentistry, Department of Restorative Dentistry, School of Dentistry São Paulo SP BrazilKaren Müller Ramalho, University of São Paulo Special Laboratory of Lasers in Dentistry, Department of Restorative Dentistry, School of Dentistry São Paulo SP BrazilJosé Leopoldo ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2699114 Tue, 11 Aug 2009 01:21:26 +0100 2699114 http://www.medworm.com/index.php?rid=2683703&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fk015618441502267%2F Content Type Journal ArticleDOI 10.1007/s10103-009-0696-x Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 24 Journal Issue Volume 24, Number 5 / September, 2009 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2683703 Fri, 07 Aug 2009 11:51:25 +0100 2683703 http://www.medworm.com/index.php?rid=3100051&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F37xk067363r131v6%2F In this study we proved the efficiency of the fluorimetric detection of a minimum number of malignant cells ex vivo. The goal of this work was to investigate whether the combination of photodynamic diagnosis (PDD) with oral brush biopsy might become a suitable chair-side tool to detect early oral carcinoma. Small numbers (100–500) of established human tumour cells—small cell lung carcinoma (OAT 75), transitional cell carcinoma of the bladder (SW1710) and human embryonic kidney cells (HEK293)—were incubated with 2 mM 5-aminolaevulinic acid (5-ALA). In addition, 50 brush biopsies from volunteers were prepared. After 2 h and 3 h of incubation, all samples were investigated by spectrofluorometry. Measurements were performed in capillaries. For excitation (405&nb... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3100051 Fri, 07 Aug 2009 11:51:09 +0100 3100051 http://www.medworm.com/index.php?rid=2683704&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F37xk067363r131v6%2F In this study we proved the efficiency of the fluorimetric detection of a minimum number of malignant cells ex vivo. The goal of this work was to investigate whether the combination of photodynamic diagnosis (PDD) with oral brush biopsy might become a suitable chair-side tool to detect early oral carcinoma. Small numbers (100–500) of established human tumour cells—small cell lung carcinoma (OAT 75), transitional cell carcinoma of the bladder (SW1710) and human embryonic kidney cells (HEK293)—were incubated with 2 mM 5-aminolaevulinic acid (5-ALA). In addition, 50 brush biopsies from volunteers were prepared. After 2 h and 3 h of incubation, all samples were investigated by spectrofluorometry. Measurements were performed in capillaries. For excitation (405&nb... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2683704 Fri, 07 Aug 2009 11:51:09 +0100 2683704 http://www.medworm.com/index.php?rid=2683705&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ft33422438754114p%2F Abstract  More than 70 million surgical procedures are performed annually in the USA with the majority involving a skin lesion and almost all individuals in their lifetime will have one or more surgical procedures resulting in scars. Patients and physicians alike are thereby motivated to improve the cosmetic outcome of scars. Prior studies have shown that the pulsed dye laser (PDL) is effective in improving the quality and appearance of the scar when using the 585-nm PDL immediately after the removal of sutures. Most published studies used a pulse duration of 450 Âµs, which along with the other study parameters, has led to an overall improvement of the scars. However, a pulse duration of 1.5 ms is also available when using the pulsed dye laser and it should theoretical... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2683705 Fri, 07 Aug 2009 11:51:04 +0100 2683705 http://www.medworm.com/index.php?rid=2681490&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F5p17k555015r2t23%2F Abstract  The purpose of this in vitro study was to evaluate the effect of etching time on the tensile bond strength (TBS) of a conventional adhesive bonded to dentin previously irradiated with erbium:yttrium–aluminum–garnet (Er:YAG) and erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) lasers. Buccal and lingual surfaces of 45 third molars were flattened until the dentin was exposed and randomly assigned to three groups (n = 30) according to the dentin treatment: control (not irradiated), irradiated with Er:YAG (1 W; 250 mJ; 4 Hz; 80.6 J/cm2) laser or Er,Cr:YSGG (4 W; 200 mJ; 20 Hz; 71.4 J/cm2) laser, and into three subgroups (n = 10) according to acid etching time (15 s, 30 s or 60 s) for ea... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2681490 Wed, 05 Aug 2009 10:04:51 +0100 2681490 http://www.medworm.com/index.php?rid=2681491&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fa938562857mp7653%2F Abstract  Photodynamic therapy (PDT) is used for the prevention and treatment of non-melanoma skin cancer. Until recently, clinically approved indications have been restricted to actinic keratoses, nodular and superficial basal cell carcinoma, and, since 2006, Bowen disease. However, the range of indications has been expanding continuously. PDT is also used for the treatment of non-malignant conditions such as acne vulgaris and leishmaniasis, as well as for treating premature skin aging due to sun exposure. The production of reactive oxygen intermediates like singlet oxygen depends on the light dose applied as well as the concentration and localization of the photosensitizer in the diseased tissue. Either cytotoxic effects resulting in tumor destruction or immunomodulatory ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2681491 Tue, 04 Aug 2009 19:14:24 +0100 2681491 http://www.medworm.com/index.php?rid=2653287&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc77122478646up53%2F Abstract  The aim of this study was to determine the amount of intra-canal dentine removed with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser using different endodontic tips and different power settings. Ninety intact extracted bovine teeth were selected as samples. After sectioning the roots and preparing the testing cylinders, we divided the samples into three main groups (A, B, C), with further subdivision of each group to be irradiated with three different powers (1500 mW, 1750 mW and 2000 mW). An Er,Cr:YSGG laser system (2.78 Î¼m, 140 Î¼s, 20 Hz and 65% water to 35% air ratio) was used for irradiation, and the loss of intra-canal dentine mass was calculated by the difference between the initial and final sampl... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2653287 Mon, 27 Jul 2009 22:35:01 +0100 2653287 http://www.medworm.com/index.php?rid=2653288&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu15585n4wv813730%2F Abstract  Thick linear telangiectasia on the ala nasi and nasolabial crease can be resistant to treatment with the potassium–titanyl–phosphate (KTP) laser and the traditional round spot on a pulsed dye laser (PDL). We evaluated the efficacy of a 3 mm × 10 mm elliptical spot using the ultra-long pulse width on a Candela Vbeam® PDL for treatment of PDL- and KTP laser-resistant nasal telangiectasia. Nasal telangiectasia resistant to PDL (12 patients) and KTP laser (12 patients) in 18 patients were treated with a 3 mm × 10 mm elliptical spot on the ultra-long pulse pulsed dye laser (ULPDL) utilising long pulse width [595 nm, 40 ms, double pulse, 30:20 dynamic cooling device (DCD)]. Six patients had previously received treatment with b... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2653288 Mon, 27 Jul 2009 22:34:55 +0100 2653288 http://www.medworm.com/index.php?rid=2644668&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F4wt0pq7201w63217%2F Conclusions: Light-activation significantly influenced the Knoop microhardness values for the darker nanofilled resin composite. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0708-xAuthors Alessandra Cassoni, Guarulhos University Department of Restorative Dentistry, School of Dentistry São Paulo BrazilJuliana de Oliveira Ferla, Guarulhos University Department of Restorative Dentistry, School of Dentistry São Paulo BrazilLuis Gustavo Barrotte Albino, Guarulhos University Department of Restorative Dentistry, School of Dentistry São Paulo BrazilMichel Nicolau Youssef, University of São Paulo Department of Restorative Dentistry, School of Dentistry São Paulo BrazilJamil Awad Shibli, Guarulhos University Department of Periodontology, School of Dentistry ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2644668 Fri, 24 Jul 2009 23:45:22 +0100 2644668 http://www.medworm.com/index.php?rid=3100052&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg245306814128650%2F Comments on: Red light of 647 nm enhances osteogenic differentiation in mesenchymal stem cells Content Type Journal ArticleCategory Letter to the EditorsDOI 10.1007/s10103-009-0711-2Authors Fei Peng, Huazhong University of Science and Technology Department of Orthopedics, Tongji Hospital, Tongji Medical College Wuhan 430030 ChinaHua Wu, Huazhong University of Science and Technology Department of Orthopedics, Tongji Hospital, Tongji Medical College Wuhan 430030 China Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 24 Journal Issue Volume 24, Number 6 / November, 2009 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3100052 Thu, 23 Jul 2009 15:23:22 +0100 3100052 http://www.medworm.com/index.php?rid=2639489&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg245306814128650%2F Content Type Journal ArticleCategory Letter to the EditorsDOI 10.1007/s10103-009-0711-2Authors Fei Peng, Huazhong University of Science and Technology Department of Orthopedics, Tongji Hospital, Tongji Medical College Wuhan 430030 ChinaHua Wu, Huazhong University of Science and Technology Department of Orthopedics, Tongji Hospital, Tongji Medical College Wuhan 430030 China Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2639489 Thu, 23 Jul 2009 15:23:22 +0100 2639489 http://www.medworm.com/index.php?rid=2681492&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm4j42nl8u261l215%2F Abstract  The aim of this study was to investigate the effect of power density and irradiation time of an argon laser on the physico-mechanical properties of light-cured dental nanocomposites. The composites were cured with 260 mW/cm2 and 340 mW/cm2 power densities at different irradiation times. The degree of conversion (DC), flexural strength, flexural modulus, water sorption, solubility and reaction temperature were measured. The maximum DC (50%), which was achieved after approximately 20 s irradiation, and the reaction temperature rise (20°C) were demonstrated by composite containing 20% filler cured at 340 mW/cm2. The composite with 25% filler cured at 340 mW/cm2 showed the highest flexural strength and modulus, which were 32.2 MPa and 1.89&... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2681492 Wed, 22 Jul 2009 02:14:40 +0100 2681492 http://www.medworm.com/index.php?rid=2605498&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F85j61875v5vu4k62%2F Conclusions: imiquimod plus laser therapy demonstrated a more favorable outcome when evaluated by the investigators or subjects. The mean scores for tattoo clearance from baseline to 2 months after completion of treatment with 5% imiquimod cream versus placebo cream were 4.3 versus 2.7 as rated by investigators and 4.7 versus 2.3 as rated by subjects. No textural changes were observed after therapy and were not shown to be different between the two groups. Further large-scale studies are important in developing a role for the use of imiqumod in laser-assisted tattoo removal. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0709-9Authors Mohamed L. Elsaie, NRC Cairo EgyptKeyvan Nouri, University of Miami, Leonard M. Miller School of Medicine Departm... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2605498 Tue, 14 Jul 2009 10:00:42 +0100 2605498 http://www.medworm.com/index.php?rid=2597780&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg6746411487r8396%2F Abstract  The aim of this study was to evaluate microleakage along resin restoration in cavities prepared with an erbium:yttrium–aluminium–garnet (Er:YAG) laser, with and without acid etching, and to compare it with that in diamond-drilled cavities. Thirty intact molars were divided into three equal groups. In the teeth in group I, class V cavities were prepared with a diamond drill. Cavities in groups II and III were prepared with an Er:YAG laser (400 mJ/15 Hz for enamel and 250 mJ/10 Hz for dentine). The cavities in groups I and II were acid-etched and adhesive and flowable composite were applied to all cavities. The specimens were first immersed in dye for 24 h and then in 5% nitric acid for 72 h for softening. The fillings were extracted... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2597780 Sat, 11 Jul 2009 06:52:50 +0100 2597780 http://www.medworm.com/index.php?rid=2592958&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F4v25r85hv5241121%2F Abstract  The aim of this clinical study was to evaluate the efficiency of in-office bleaching systems with different light sources for color change and possible side effects such as tooth sensitivity and gingival irritations. Forty healthy volunteers aged 18 years and older (average age 27.3 years), having all their natural healthy teeth in shade A3 or darker on the Vita shade guide, with no restorations on the buccal surfaces and no tooth sensitivity, participated in this study. Participants were randomly assigned to four groups of ten volunteers. Group 1 received bleaching without light activation (Opalescence Xtra Boost, Ultradent); group 2 received bleaching (Laser White 10, Biolase) with a diode laser (810 nm, 10 W/ Laser Smile, Biolase) activation... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2592958 Thu, 09 Jul 2009 12:04:27 +0100 2592958 http://www.medworm.com/index.php?rid=2592957&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F40773340m5118130%2F Abstract  The ability of Staphylococcus aureus to develop multidrug resistance is well documented, and the antibiotic resistance showed by an increasing number of bacteria has shown the need for alternative therapies to treat infections, photodynamic therapy (PDT) being a potential candidate. The aim of this study was to determine the effect of photodynamic therapy as a light–based bactericidal modality to eliminate Staphylococcus aureus. The study investigated a technique based on a combination of light and a photosensitizer that is capable of producing oxidative species to induce a cytotoxic effect. A Staphylococcus aureus suspension was exposed to a light emitting diode (LED) emitting at 628 nm, 14.6 mW/cm2, and energy density of 20J/cm2, 40J/cm2, or 60 J/... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2592957 Thu, 09 Jul 2009 12:04:27 +0100 2592957 http://www.medworm.com/index.php?rid=2590986&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fjp32682g4h403178%2F This study was to evaluate specific effects of photodynamic therapy (energy density 15.8 J/cm2, 26.3 J/cm2 and 39.5 J/cm2) using methylene blue, toluidine blue and malachite green as photosensitizers and low-power laser irradiation on the viability of Candida albicans. Suspensions of C. albicans containing 106 cells/ml were standardized in a spectrophotometer. For each dye, 120 assays, divided into four groups according to the following experimental conditions, were carried out: laser irradiation in the presence of the photosensitizer; laser irradiation only; treatment with the photosensitizer only; no exposure to laser light or photosensitizer. Next, serial dilutions were prepared and seeded onto Sabouraud dextrose agar for the determination of the number of colony-form... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2590986 Mon, 06 Jul 2009 20:01:23 +0100 2590986 http://www.medworm.com/index.php?rid=2590987&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F21658j06640522g3%2F Abstract  The purpose of this study was to examine the effect of toluidine blue (TB)-mediated photodynamic therapy (PDT) on oral wound infections in rats. The study called for a combination treatment of a 1mg/ml solution of TB with a red light at three intensity settings of 12 J/cm2, 24 J/cm2 and 48 J/cm2. In the group that was given the highest light dose of 48 J/cm2, an average kill rate of approximately 97% was achieved. A lesser killing effect was achieved in the group that was subjected to the lowest light dose of 12 J/cm2, where an average of approximately 25% of the bacteria survived. After PDT, the lesions were allowed to develop, and the peak size of the lesions was larger in the control group than in the test groups, especially for the 48&nb... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2590987 Mon, 06 Jul 2009 20:01:21 +0100 2590987 http://www.medworm.com/index.php?rid=3100053&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fbw0t0156246856g5%2F Abstract  The aim of this study was to compare the effects of the pulsed-dye laser (PDL) at a wavelength of 585 nm with those at 595 nm in the treatment of post-surgical scars, starting on the day of suture removal. The study was a prospective, non-randomized, double-blind, controlled, clinical trial, set in an outpatient clinic. Fifteen outpatients with 21 post-operative scars at least 3 cm long were recruited, and 14 patients with 19 scars completed the study. Scars were divided into three equal portions. Each outer portion was randomly allocated to PDL at 585 nm or at 595 nm (3.5 J/cm2, 450 Î¼s, 10 mm spot size), and the center was an untreated control; treatment was composed of three laser sessions at 4-week intervals. A blinded ex... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3100053 Mon, 06 Jul 2009 17:06:42 +0100 3100053 http://www.medworm.com/index.php?rid=2579826&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fbw0t0156246856g5%2F Abstract  The aim of this study was to compare the effects of the pulsed-dye laser (PDL) at a wavelength of 585 nm with those at 595 nm in the treatment of post-surgical scars, starting on the day of suture removal. The study was a prospective, non-randomized, double-blind, controlled, clinical trial, set in an outpatient clinic. Fifteen outpatients with 21 post-operative scars at least 3 cm long were recruited, and 14 patients with 19 scars completed the study. Scars were divided into three equal portions. Each outer portion was randomly allocated to PDL at 585 nm or at 595 nm (3.5 J/cm2, 450 Î¼s, 10 mm spot size), and the center was an untreated control; treatment was composed of three laser sessions at 4-week intervals. A blinded ex... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2579826 Mon, 06 Jul 2009 17:06:42 +0100 2579826 http://www.medworm.com/index.php?rid=2579827&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fx610623236764112%2F Abstract  The purpose of this study was to compare the compositional changes and microhardness of the cavity floor prepared by erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser irradiation with those of the conventional bur-prepared cavity. A total of 16 extracted human molar teeth (with no carious lesions or repairs) were selected for this study. On the buccal and lingual (palatal) surfaces of each tooth, cavities (diameter 3 mm, depth 2 mm) were prepared with an Er,Cr:YSGG laser system (Waterlase MDTM, USA) and high-speed turbine. The cavities were cross-sectioned and subjected to atomic analysis by scanning electron microscopy–energy dispersive X-ray spectrometry (SEM-EDX) and Vickers hardness test. Statistical analyses were performed w... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2579827 Mon, 06 Jul 2009 16:52:50 +0100 2579827 http://www.medworm.com/index.php?rid=3100054&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu68067j326668647%2F Abstract  The aim of this study was to investigate the role of mast cells in mechanisms of collagen remodelling induced by non-ablative laser treatment. The dorsal skin of Kunming (KM) mice was exposed to 1,320 nm neodymium–yttrium–aluminium garnet (Nd:YAG) laser weekly for four consecutive weeks. Biopsies were taken 1 h after irradiation and 1 day, 7 days, 14 days, 30 days and 60 days after the first treatment. Skin samples were studied for mast cells, fibroblasts, and type I and III collagen, by toluidine blue, haematoxylin–eosin (HE) and immunohistochemical staining, respectively. The total number of mast cells in the skin of experimental group was significantly greater than that in the control at 1 h, 1 day, 21 days... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=3100054 Tue, 30 Jun 2009 15:43:26 +0100 3100054 http://www.medworm.com/index.php?rid=2569477&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu68067j326668647%2F Abstract  The aim of this study was to investigate the role of mast cells in mechanisms of collagen remodelling induced by non-ablative laser treatment. The dorsal skin of Kunming (KM) mice was exposed to 1,320 nm neodymium–yttrium–aluminium garnet (Nd:YAG) laser weekly for four consecutive weeks. Biopsies were taken 1 h after irradiation and 1 day, 7 days, 14 days, 30 days and 60 days after the first treatment. Skin samples were studied for mast cells, fibroblasts, and type I and III collagen, by toluidine blue, haematoxylin–eosin (HE) and immunohistochemical staining, respectively. The total number of mast cells in the skin of experimental group was significantly greater than that in the control at 1 h, 1 day, 21 days... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2569477 Tue, 30 Jun 2009 15:43:26 +0100 2569477 http://www.medworm.com/index.php?rid=2569478&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb5q948j6x4347928%2F This study reports the treatment of a selected group of 74 patients treated at the Laser Center of the Federal University of Bahia between 2003 and 2008. Following standard anamneses, clinical and imaging examination and with the diagnosis of any type of TMD, the patients were prepared for LPT. No other intervention was carried out during the treatment. Treatment consisted of three sessions a week for 6 weeks. Prior to irradiation, the patients were asked to score their pain using a visual analog scale (VAS). Lasers of wavelength (λ)780 nm, λ790 nm or λ830 nm and/or λ660 nm were used at each session (30/40 mW; spot (Ï•) ∼3 mm; mean dose per session 14.2 ± 6.8 J/cm2; mean treatment dose of 170 ± 79.8 J/cm2). Of the patients, ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2569478 Tue, 30 Jun 2009 15:43:25 +0100 2569478 http://www.medworm.com/index.php?rid=2560277&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fu42lu6244586u87g%2F This study evaluated the microleakage of brackets bonded by four different enamel etching techniques. Forty freshly extracted human premolars were divided randomly into four equal groups and received the following treatment: group 1, acid etching; group 2, self-etching primer (SEP); group 3, erbium:yttrium–aluminum–garnet (Er:YAG) laser etching; and group 4, erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser etching. After photopolymerization, the teeth were kept in distilled water for 1 month and then subjected to 500 thermal cycles. Then, the specimens were sealed with nail varnish, stained with 0.5% basic fuchsin for 24 h, sectioned, and examined under a stereomicroscope. In addition, they were scored for marginal microleakage at the adhesive–... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2560277 Mon, 29 Jun 2009 10:43:13 +0100 2560277 http://www.medworm.com/index.php?rid=2560278&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb8v676j864111117%2F In this study we describe the intraoral welding in vivo on human subjects by using, as in the previous study, a fibre-delivered neodymium:yttrium–aluminum–garnet (Nd:YAG) laser. The in vivo phase allowed a restored prosthesis to be positioned and intraorally welded in the upper central sector with optimal results both in patient’s comfort and in aesthetic effects. This first in vivo test confirmed that the use of a laser technique for the intraoral welding of metal prostheses is possible, with no particular problems and risks for the biological structures close to the welding zone. Content Type Journal ArticleCategory Brief ReportDOI 10.1007/s10103-009-0702-3Authors Carlo Fornaini, Faculty of Medicine, University of Liege Department of Dental Sciences Liege BelgiumPaolo Vesco... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2560278 Mon, 29 Jun 2009 10:43:06 +0100 2560278 http://www.medworm.com/index.php?rid=2550151&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fh22x524v14755285%2F Abstract  Studies suggest that high-intensity physical exercise can cause damage to skeletal muscles, resulting in muscle soreness, fatigue, inflammatory processes and cell apoptosis. The aim of this study was to investigate the effects of low-level laser therapy (LLLT) on a decrease in creatine kinase (CK) levels and cell apoptosis. Twenty male Wistar rats were randomly divided into two equal groups: group 1 (control), resistance swimming; group 2 (LLLT), resistance swimming with LLLT. They were subjected to a single application of indium gallium aluminum phosphide (InGaAlP) laser immediately following the exercise for 40 s at an output power of 100 mW, wavelength 660 nm and 133.3 J/cm2. The groups were subdivided according to sample collection time: 24&... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2550151 Thu, 25 Jun 2009 07:13:08 +0100 2550151 http://www.medworm.com/index.php?rid=2504701&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fj908228l72323284%2F Abstract  The study investigated the influence of varying amounts of air/water spray and the energy used by an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) 2,780 nm laser when treating dental tissues. The morphological effects produced by the laser interaction on healthy human enamel were evaluated by scanning electron microscopy (SEM). The vestibular and lingual surfaces of ten molars were treated with laser at different power settings; each surface was subdivided into cervical, median, and occlusal parts and treated with different proportions of water spray; the series contained 60 tooth portions. Treatment differed in terms of power setting and air/water percentage. All specimens were then subjected to dehydration and metallisation. At SEM eval... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504701 Tue, 23 Jun 2009 06:07:18 +0100 2504701 http://www.medworm.com/index.php?rid=2504700&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F3644l8703g3p2731%2F Abstract  The aim was to evaluate the mechanical properties and porcelain bonded strength of nickel–chromium (Ni–Cr) dental alloy fabricated by laser rapid forming (LRF). The tensile properties and porcelain bonded strengths of LRF Ni–Cr dental alloy were evaluated by tensile tests (five specimens per group) and three-point bending tests (ten specimens per group). The same tests for the cast Ni–Cr dental alloy were used as for the control. The microstructure and the bonding interface of the metal substrate to porcelain were analyzed by optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The tensile strength of LRF Ni–Cr dental alloy (840 MPa) was superior to that of the cast Ni–Cr alloy (670 MPa), ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504700 Tue, 23 Jun 2009 06:07:18 +0100 2504700 http://www.medworm.com/index.php?rid=2504703&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fr807215r37l86637%2F Abstract  The aim of this study was to investigate the effectiveness of the erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser by measuring its bactericidal effect inside root canals experimentally colonized with Enterococcus faecalis. We also determined the optimal conditions for the Er,Cr:YSGG laser to achieve the maximal bactericidal effect. An Er,Cr:YSGG WaterlaseTM laser was used, and its antimicrobial effect was compared with that of sodium hypochlorite (NaOCl) at various concentrations as widely used in clinics. This laser emits photons at a wavelength of 2.78 Âµm. It is a pulsed laser operating at 20 Hz (20 pulses/s). Significant differences between measurements in the different groups (P < 0.05) were observed, depending on time... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504703 Tue, 23 Jun 2009 06:07:17 +0100 2504703 http://www.medworm.com/index.php?rid=2504702&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F28w44884755r7372%2F This study evaluated the effect of low-level laser therapy (LLLT) on the chemical composition, crystallinity and crystalline structure of bone at the site of distraction osteogenesis. Five rabbits were subjected to distraction osteogenesis (latency = 3 days; rate and frequency = 0.7 mm/day for 7 days; consolidation = 10 days), and three were given LLLT with arsenide–gallium–aluminum (AsGaAl; 830 nm, 40 mW): 10 J/cm2 dose per spot, applied directly to the distraction osteogenesis site during the consolidation stage at 48 h intervals. Samples were harvested at the end of the consolidation stage. X-ray fluorescence and X-ray diffraction were used to analyze chemical composition, crystallinity and crystalline structure of bone at the distraction... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504702 Tue, 23 Jun 2009 06:07:17 +0100 2504702 http://www.medworm.com/index.php?rid=2504704&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc2724jww26188mv4%2F In conclusion, from our experience, it is possible to observe that an early conservative surgical approach with Er:YAG laser associated with LLLT, for BP-induced ONJ could be considered as more efficient in comparison with medical therapy or other conventional techniques. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0687-yAuthors Paolo Vescovi, EMDOLA (European Master Degree on Oral Laser Applications) - University of Parma Oral Medicine and Laser-Assisted Surgery Unit- Section of Dentistry – Department of ENT/Dental/Ophtalmological and Cervico-Facial Sciences Parma ItalyMaddalena Manfredi, EMDOLA (European Master Degree on Oral Laser Applications) - University of Parma Oral Medicine and Laser-Assisted Surgery Unit- Section of Dentistry – Departmen... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504704 Fri, 19 Jun 2009 06:44:45 +0100 2504704 http://www.medworm.com/index.php?rid=2504705&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc417676p2m76w403%2F Abstract  The aim of this study was to conduct a histological assessment of the effect of photodynamic therapy (PDT) on the repairing of third-degree-burn wounds made on the backs of rats with a heated scalpel. Ninety-six rats were divided into groups: G1, control (n = 24), cold scalpel; G2, burned, heated scalpel (n = 24); G3, low-level laser therapy (LLLT) (n = 24), on burns; and G4, photodynamic therapy (PDT) (n = 24), toluidine-O blue (100 Âµg/ml) and LLLT treatment on burns. The laser (685 nm) was applied in continuous mode, 50 mW, 4.5 J/cm2, contact mode at nine points (9 s/point). Eight animals in each group were killed at 3 days, 7 days or 14 days after surgery, and tissue specimens containing the whole wounded a... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504705 Wed, 17 Jun 2009 07:09:04 +0100 2504705 http://www.medworm.com/index.php?rid=2504706&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fa68428175p3l5270%2F Abstract  The capacity of photo-sensitizers, used in combination with laser light to kill micro-organisms has been demonstrated in different studies. Photo-activated disinfection (PAD) has been introduced in periodontology as an aid for disinfection of periodontal pockets. The aim of this study is to verify the harm for dental vitality of the use of PAD in periodontal pockets. Root canals of 24 freshly extracted human teeth where prepared using profiles up to a size of ISO #50 and filled with thermo-conductor paste. A silicon-based false gum was made in which a periodontal pocket was created and filled with photo-sensitizer phenothiazine chloride (phenothiazine-5-ium, 3.7-bis (dimethylamino)-, chloride). The external root surface was irradiated during 60 s with a 660-nm dio... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2504706 Tue, 16 Jun 2009 05:51:43 +0100 2504706 http://www.medworm.com/index.php?rid=2462816&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F8h4595l58328866j%2F Abstract  Optical properties of bovine ocular tissues were determined at laser wavelengths in the visible region. The inverse adding doubling (IAD), Kubelka–Munk (KM), and inverse Monte Carlo (IMC) methods were applied to the measured values of the total diffuse transmission, total diffuse reflection, and collimated transmission to determine the optical absorption and scattering coefficients of the bovine cornea, lens and retina at 457.9 nm, 488 nm, and 514.5 nm laser lines from an argon ion laser. The optical properties obtained from these three methods were compared, and their validity is discussed. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0677-0Authors Dhiraj K. Sardar, University of Texas at San Antonio Department o... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2462816 Thu, 04 Jun 2009 10:08:15 +0100 2462816 http://www.medworm.com/index.php?rid=2456286&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fx851115t352q3365%2F Abstract  Photo-activated decontamination (PAD) has been reported in caries treatment as an aid in dentine decontamination. The aim of this study is to verify the harmlessness for pulp vitality of photo-activated decontamination (PAD) in caries treatment. Twenty freshly extracted single-rooted teeth were used. Deep class I cavities with a ≤ 0.5 mm dentine thickness between the floor of the cavity and the roof of cameral pulp were prepared. Following the manufacturer’s instructions, cavities were filled with a photo-sensitizer (Phenothiazinechloride: 10 mg /ml), irradiated during 30 s with a 660-nm diode laser (output power: 40 mW in continuous wave; total delivered energy density: 4.87 J/cm2). Pulp temperature raises were recorded using a thermoc... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2456286 Tue, 02 Jun 2009 08:08:34 +0100 2456286 http://www.medworm.com/index.php?rid=2456287&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc32lr536k8238825%2F This study demonstrates that extraoral LLLT is more effective than intraoral LLLT for the reduction of postoperative trismus and swelling after extraction of the lower third molar. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0684-1Authors Mutan Hamdi Aras, Gaziantep University Faculty of Dentistry, Department of Oral and Maxillofacial Surgery Gaziantep TurkeyMetin Güngörmüş, Ataturk University Faculty of Dentistry, Department of Oral and Maxillofacial Surgery Erzurum Turkey Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2456287 Sun, 31 May 2009 08:19:36 +0100 2456287 http://www.medworm.com/index.php?rid=2456288&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb34m6p5655m86q04%2F Abstract  The aim of this study is to compare the effectiveness of low-level laser irradiation to traditional topical fluoride treatment for treatment choices of dentinal hypersensitivity following scaling and root planing. The experimental group (15 patients) was treated with low-energy-level diode laser at each site of dentinal hypersensitivity following scaling and root planning. The control group (15 patients) received topical fluoride treatment (protective varnish for desensitization). All the patients were treated at baseline visit, and then at day 2 and 4 after the initial treatment; the pain was subjectively assessed by the patients as strong, medium, medium low, low, or no pain. Total absence of the dental hypersensitivity was reported in 26.66% of the examined gro... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2456288 Sun, 31 May 2009 08:19:34 +0100 2456288 http://www.medworm.com/index.php?rid=2446326&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F12528388q6102723%2F Abstract  This in vitro study evaluated the shear bond strength (SBS) of two self-etch adhesives to coronal and root dentin treated with erbium:yttrium–aluminum–garnet (Er:YAG) or neodymium:yttrium–aluminum–garnet (Nd:YAG) lasers for dentin hypersensitivity. The coronal and root dentin surfaces of 60 extracted human cuspids were divided into three groups (n = 20): (1) control (without treatment); (2) treated with Er:YAG; (3) treated with Nd:YAG laser and a one-step (S3) or two-step self-etch adhesive (SE). A nano-composite was applied and SBS tests were performed. The mean SBS values were calculated, failure modes were determined, and data were subjected to statistical analysis (P = 0.05). Control/SE exhibited higher values than did control/S3 and Nd:YAG/S3 on... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2446326 Thu, 28 May 2009 09:15:13 +0100 2446326 http://www.medworm.com/index.php?rid=2432229&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F879751n0711r1321%2F Abstract  In acute experiments using adult rabbits, we measured the paroxysmal discharge threshold (PADT) elicited by stimulation to the apical dendritic layer of the hippocampal CA1 region before and after low-power laser irradiation. Nd:YVO4 laser irradiation (wavelength: 532 nm) was introduced into the same region as the stimulation site. The average PADT was 247 ± 13 Î¼A (n = 18) before laser irradiation, while after 5-min laser irradiation with 50, 75, and 100 mW, PADT was 333 ± 40 (n = 4), 353 ± 33 (n = 4) and 367 ± 27 Î¼A (n = 6), respectively. The latter two increments were statistically significant compared to the control (p < 0.05 and p < 0.01). After 10-min laser irradiation with 75 and 100 mW... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2432229 Fri, 22 May 2009 05:47:17 +0100 2432229 http://www.medworm.com/index.php?rid=2432231&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ft00uk67741282237%2F Abstract  The aim of our study was to evaluate the potential of en face optical coherence tomography (OCT) for the detection of apical microleakage after 980 nm and 1,064 nm laser-assisted endodontic treatment. Ninety, human, single-rooted teeth with one straight root canal and closed apices were used. All roots were prepared biomechanically to the working length at an apical size 30 and 0.06 taper. The teeth were divided into three equal groups of 30 samples each, according to the treatment to be applied to the root canal. Group I received 980 nm diode laser (3 W, 0.01 s on time, 0.01 s off time, 5 s per procedure, four procedures); group II received neodymium:yttrium–aluminum–garnet (Nd:YAG) laser (1.5 W, 15 Hz, 5&... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2432231 Wed, 20 May 2009 06:25:03 +0100 2432231 http://www.medworm.com/index.php?rid=2422930&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F483455r813523423%2F Abstract  Laser tissue soldering based on protein as biological glues and other compounds can provide greater bond strength and less collateral damage. Endogenous and exogenous materials such as indocyanine green (ICG) are often added to solders to enhance light absorption. The purpose of this in vitro study was to examine the impact of different parameters of laser soldering on the thermo-physical properties of the skin. A mixture of albumin solder and ICG was prepared, and then the coated samples were irradiated by an 810 nm diode laser under different conditions. The temperature rise, number of scans (Ns), and scan velocity (Vs) were investigated in this study. The results showed that, at each laser irradiance (I), the tensile strength (σ) of incisions repaired... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2422930 Sat, 16 May 2009 06:05:03 +0100 2422930 http://www.medworm.com/index.php?rid=2422931&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ffu5w4724j1713177%2F Abstract  The aim of this study was to compare low-level laser therapy (LLLT) as adjuvant treatment for induced periodontitis with scaling and root planing (SRP) in dexamethasone-treated rats. One-hundred twenty rats were divided into groups: D group (n = 60), treated with dexamethasone; ND group (n = 60) treated with saline solution. In both groups, periodontal disease was induced by ligature at the left first mandibular molar. After 7 days, the ligature was removed and all animals were subjected to SRP and were divided according to the following treatments: SRP, irrigation with saline solution (SS); SRP + LLLT, SS and laser irradiation (660 nm; 24 J; 0.428 W/cm2). Ten animals in each treatment were killed after 7 days, 15 days and 30&nbs... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2422931 Thu, 14 May 2009 07:10:48 +0100 2422931 http://www.medworm.com/index.php?rid=2413598&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F3130213763482318%2F Abstract  The desire for perfect and white teeth can be accomplished in aesthetical dentistry by modern tooth bleaching methods. Within the scope of a clinical study, laser assisted in-office bleaching was applied to the teeth of 20 individual patients with a neodymium:yttrium–aluminum–garnet (Nd:YAG) laser (λ = 1.064 Âµm, average power 4 W, pulse repetition rate 10 Hz, pulse duration 320 Âµs). The treatment was carried out in a split-mouth design, each patient having two appointments with 1 week in between. Laser activation of the bleaching agent was performed on teeth 14–11 and 34–31 per session, with a total irradiation time of 30 s per tooth. The initial and the final color of the teeth were ascertained by VITA Colorsticks and t... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2413598 Sat, 09 May 2009 05:48:26 +0100 2413598 http://www.medworm.com/index.php?rid=2413597&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb1175r2753582480%2F This study aimed to evaluate the capacity of photodynamic therapy to reduce the numbers of viable bacteria in periodontal pockets. Microbiological samples were collected before and after scaling and after photodynamic therapy. Photodynamic therapy was performed through the insertion of the photosensitizer toluidine blue and Endo PTC into the pocket for 3 min, followed by photosensitization with low-intensity diode of 4 J/cm2. The results (log10) were submitted to a descriptive analysis and a t-test. A reduction of 81.24% in the numbers of bacteria after scaling was observed, as well as 95.90% after photodynamic therapy (P < 0.01). Photodynamic therapy is indicated as an adjuvant treatment to reduce the numbers of viable bacteria in periodontal diseases. Content Typ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2413597 Sat, 09 May 2009 05:48:26 +0100 2413597 http://www.medworm.com/index.php?rid=2413599&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fj56m552wv5382111%2F This report describes the state-of-the-art application of different laser systems in modern implant dentistry for the treatment of peri-implant lesions and decontamination of implant surfaces. Our study evaluated in vitro examinations, clinical experience and long-term clinical studies. The exact selection of the appropriate laser system and wavelength was dependent on the scientific evaluation of recent literature and the level of changes in implant and tissue temperatures during laser application. The significant reduction in bacteria on the implant surface and the peri-implant tissues during irradiation and the cutting effects associated with the coagulation properties of the lasers are the main reasons for laser application in the treatment of peri-implant lesions and the succes... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2413599 Sat, 09 May 2009 05:48:25 +0100 2413599 http://www.medworm.com/index.php?rid=2387271&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm17014m7729006h4%2F In conclusion, rats treated with photodynamic therapy developed more discrete candidiasis lesions than did the remaining groups. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0673-4Authors Juliana Campos Junqueira, São Paulo State University (UNESP) Department of Biosciences and Oral Diagnosis, School of Dentistry of São José dos Campos Francisco José Longo 777, São Dimas São José dos Campos São Paulo 12245-000 BrazilJoyce da Silva Martins, São Paulo State University (UNESP) Department of Biosciences and Oral Diagnosis, School of Dentistry of São José dos Campos Francisco José Longo 777, São Dimas São José dos Campos São Paulo 12245-000 BrazilRaquel Lourdes Faria, São Paulo State University (UNESP) Department of Biosciences and Oral Diag... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2387271 Fri, 01 May 2009 06:48:05 +0100 2387271 http://www.medworm.com/index.php?rid=2387272&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fd7105l6377681371%2F Abstract  The aim of this study was to evaluate and compare the healing process after surgical treatment of chemically induced lesions in the lateral edge of tongue of hamsters performed with scalpel, electrocautery, carbon dioxide (CO2) laser radiation or neodymium:yttrium–aluminum–garnet (Nd:YAG) laser radiation. Eighty hamsters of both sexes were used and examined at postoperative days 7, 14, 21 and 28 by histological and histomorphometric analysis of the skeletal muscle fibers. In the histological analysis it was observed that the dynamics of the healing process was faster in the group treated by scalpel than in the other groups. The histomorphometric observation of the skeletal muscle fibers was submitted to one-way analysis of variance (ANOVA) and Tukey’s mu... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2387272 Fri, 01 May 2009 06:48:04 +0100 2387272 http://www.medworm.com/index.php?rid=2380190&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F312m315274441682%2F The objective of our study was to evaluate the effect of laser therapy on fracture healing. Thirty rabbits were subjected to tibial bone open osteotomies that were stabilized with external fixators. The animals were divided into two study groups: laser group and control group. Callus development and bone mineral density were quantitatively evaluated by CT; the animals were then killed and the fractures were assessed for biomechanical properties. The results demonstrated that the increasing rate of bone mineral density was higher in the laser (L) group than in the control (C) group. CT at 5 weeks revealed a mean callus density of 297 Hounsfield units (HU) for the control group and 691 HU for the L group, which was statistically significant (P = 0.001). In the L group, the me... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2380190 Tue, 28 Apr 2009 13:01:30 +0100 2380190 http://www.medworm.com/index.php?rid=2374769&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fjj735v5jq1388652%2F Abstract  The aim of this study was to evaluate the microleakage of all-in-one self-etch adhesives and their respective nanocomposites in class V cavities prepared by erbium:yttrium–aluminum–garnet (Er:YAG) laser and bur. Class V cavities were prepared on both buccal and lingual surfaces of 72 premolars by Er:YAG laser or bur and divided into six groups (n = 24). The occlusal margins were enamel and the cervical margins were cementum. The groups were as follows: group 1 Er:YAG laser preparation (E) + Xeno V (X) + CeramX (C); group 2 bur preparation (B) + X + C; group 3 E + AdheSE One (A) + Tetric EvoCeram (T); group 4 B + A + T; group 5 E + Clearfil S3 Bond (CSB) + Clearfil Majesty Esthetic (CME); group 6 B + CSB + CME. All teeth were stored in distilled water at 37Â... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2374769 Sun, 26 Apr 2009 05:48:03 +0100 2374769 http://www.medworm.com/index.php?rid=2358776&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Flg57257571676525%2F We describe the first clinical application of ultrasound-guided interstitial photodynamic therapy (US-iPDT). A total of 23 treatments with meta-tetra-hydroxyphenyl chlorine (mTHPC) and ultrasound-guided interstitial photodynamic therapy were performed on 21 patients with various conditions at the Head & Neck Centre, University College London Hospital. The needles could be clearly identified during insertion in all 23 treatments, and it was possible to guide parallel needle insertions using ultrasound. Although the resolution of ultrasound is not as high as that of other imaging modalities [i.e. computed tomography (CT) and magnetic resonance imaging (MRI)] it was satisfactory in identifying the centre and the peripheries of the pathological lesions. Ultrasound is very easy to perform... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2358776 Mon, 20 Apr 2009 22:27:39 +0100 2358776 http://www.medworm.com/index.php?rid=2340663&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fe8k1873334128438%2F Content Type Journal ArticleCategory ErratumDOI 10.1007/s10103-009-0669-0Authors Hyung Keun Kim, Chonnam National University Hwasun Hospital Department Orthopaedics 160 Ilsimri Hwasun-eup Hwasun-gun Jeonnam 519-809 KoreaJi Hyun Kim, Chonnam National University Hwasun Hospital Department Orthopaedics 160 Ilsimri Hwasun-eup Hwasun-gun Jeonnam 519-809 KoreaAzlina Amir Abbas, Chonnam National University Hwasun Hospital Department Orthopaedics 160 Ilsimri Hwasun-eup Hwasun-gun Jeonnam 519-809 KoreaDong-Ok Kim, Chonnam National University Department Electric Engineering Gwangju 500-757 KoreaSung-Jun Park, Chonnam National University Department Electric Engineering Gwangju 500-757 KoreaJae Yoon Chung, Chonnam National University Hwasun Hospital Department Orthopaedics 160 Ilsimri Hwasun-eup H... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2340663 Tue, 07 Apr 2009 05:57:53 +0100 2340663 http://www.medworm.com/index.php?rid=2327019&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F88457101vj238x37%2F Content Type Journal ArticleCategory ErratumDOI 10.1007/s10103-009-0668-1Authors Renate R. van den Bos, Erasmus Medical Centre Department of Dermatology P.O. BOX 2040, 3000 CA Rotterdam The NetherlandsMichael A. Kockaert, Erasmus Medical Centre Department of Dermatology P.O. BOX 2040, 3000 CA Rotterdam The NetherlandsH. A. Martino Neumann, Erasmus Medical Centre Department of Dermatology P.O. BOX 2040, 3000 CA Rotterdam The NetherlandsRolf H. Bremmer, Academic Medical Centre Department of Biomedical Engineering and Physics Amsterdam The NetherlandsTamar Nijsten, Erasmus Medical Centre Department of Dermatology P.O. BOX 2040, 3000 CA Rotterdam The NetherlandsMartin J. C. van Gemert, Academic Medical Centre Department of Biomedical Engineering and Physics Amsterdam The Netherlands ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2327019 Sun, 05 Apr 2009 14:07:40 +0100 2327019 http://www.medworm.com/index.php?rid=2327020&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fp77408l714k30061%2F Content Type Journal ArticleCategory AbstractsDOI 10.1007/s10103-009-0667-2 Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2327020 Sun, 05 Apr 2009 14:07:39 +0100 2327020 http://www.medworm.com/index.php?rid=2327021&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F6586j5t4039710p7%2F Abstract  The purpose of this study was to evaluate the effect of erbium:yttrium–aluminum–garnet (Er:YAG) laser (2.94 Î¼m) irradiation on the removal of root surface smear layer of extracted human teeth and to compare its efficacy with that of citric acid, ethylenediamine tetra-acetic acid (EDTA), or a gel containing a mixture of tetracycline hydrochloride (HCl) and citric acid, using scanning electron microscopy (SEM). Thirty human dentin specimens were randomly divided into six groups: G1 (control group), irrigated with 10 ml of physiologic saline solution; G2, conditioned with 24% citric acid gel; G3, conditioned with 24% EDTA gel; G4, conditioned with a 50% citric acid and tetracycline gel; G5, irradiated with Er:YAG laser (47 mJ/10 Hz/5.8 J/... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2327021 Sat, 28 Mar 2009 08:53:25 +0100 2327021 http://www.medworm.com/index.php?rid=2296219&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fd6j31234n468tv44%2F In this study we examined whether upconversion sodium yttrium fluoride (NaYF4) nanocrystals were suitable for autofluorescence-free multicolor fluorescence imaging in a living animal. Tissue autofluorescence was induced with a 405 nm light source, then rats were subjected to injection of fluorescein isothiocyanate (FITC), cadmium selenide/zinc sulfide (CdSe/ZnS) quantum dots (QDs), or NaYF4:ytterbium/thulium (Yb3+/Tm3+), NaYF4:Yb3+/holmium (Ho3+), and NaYF4:Yb3+/Ho3+/cerium (Ce3+) nanocrystals. Imaging with NaYF4 nanocrystals (974 nm laser) completely removed the high tissue autofluorescence, in marked contrast to imaging with FITC and QDs (405 nm light). Optical imaging experiments demonstrated that multiple biological targets and organs could be imaged at the same time... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2296219 Thu, 26 Mar 2009 08:25:29 +0100 2296219 http://www.medworm.com/index.php?rid=2296218&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fmn47410062424047%2F This study showed that thermal increases in pulp chamber, sulcus, root and bone were biologically compatible and that intra-oral laser welding, at the parameters used in this work, seems to be harmless to the biological structures close to the welding and thermally affected zones. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0666-3Authors C. Fornaini, University of Liege Department of Dental Sciences, Faculty of Medicine Liege BelgiumC. Bertrand, Université de Nice-Sophie Antipolis Nice FranceJ. P. Rocca, Université de Nice-Sophie Antipolis Nice FranceP. Mahler, Université de Nice-Sophie Antipolis Nice FranceM. Bonanini, Università di Parma Parma ItalyP. Vescovi, Università di Parma Parma ItalyE. Merigo, Università di Parma Parma ItalyS. Nammour,... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2296218 Thu, 26 Mar 2009 08:25:29 +0100 2296218 http://www.medworm.com/index.php?rid=2296220&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fl753r774k75212r4%2F This study reports on the histological findings from biopsies taken immediately after a single RF treatment session, on cellulite located in the buttocks, with a novel technology called automatic multi-frequency and low impedance (AMFLI) RF. Tissue samples were stained with either haematoxylin and eosin (H&E), so that we could study the morphological findings, or with oil red O, to enable us to identify lipid deposits. The histological findings observed in biopsies taken after a single RF treatment showed changes in shape, size, and lipid content, as well as in cytoplasmic and nuclear morphology. After RF treatment adipocytes were more polyhedric, with irregular, degenerated membranes, with less or no lipid content and apoptotic changes. We postulate that RF treatment on celluli... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2296220 Thu, 26 Mar 2009 08:25:28 +0100 2296220 http://www.medworm.com/index.php?rid=2283626&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F5516414636126687%2F Abstract  Mastodynia is correlated with the menstrual cycle. Using frequency-domain near-infrared spectroscopy (FD-NIRS), we investigated changes in breast perfusion in women who were or were not using hormonal contraception. Healthy volunteers, on or not on hormonal contraception, were examined. Optical properties were measured in all quadrants of both breasts, and physiological parameters were calculated. Measurements were repeated every other day during one complete menstrual cycle. Measurements were comparable in all quadrants. Data remained unchanged during the entire cycle in patients using hormonal contraception. However, a biphasic variation of deoxyhemoglobin, oxyhemoglobin, total hemoglobin (tHb), and water content (H2O) was observed in women not using contraceptio... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2283626 Tue, 17 Mar 2009 06:47:39 +0100 2283626 http://www.medworm.com/index.php?rid=2273657&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fgmwn6w07p71mh433%2F Abstract  The formation of a superficial layer of tiny flakes has been observed on teeth prepared by Erbium lasers. It has been suggested that removing this layer (mechanically or chemically) may increase the bond strength of the resin composite. The purpose of this study is to evaluate the effect of various etching times on bond strength of resin composite to enamel and dentin prepared by Er,Cr:YSGG laser. Sixty previously flattened human molars were irradiated for 10 s by an Er,Cr:YSGG laser. Enamel (E) specimens were etched with 37% H3PO4 for 20, 40 or 60 s and dentin (D) specimens were etched for 15 or 30 s. All specimens were prepared for a standard shear bond strength (SBS) test (1 mm/min). Data were analyzed [ANOVA, Tukey post-hoc, a < 0.05)] and... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2273657 Sat, 14 Mar 2009 13:36:36 +0100 2273657 http://www.medworm.com/index.php?rid=2267371&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fw8k424m58m0577j8%2F In conclusion, using the Er, Cr: YSGG laser has no advantages over conventional root-end cavity preparation methods when a composite filling material is used to seal root-end cavities. Content Type Journal ArticleCategory Brief ReportDOI 10.1007/s10103-009-0661-8Authors Mehmet Kemal Çalışkan, Ege University Department of Restorative Dentistry & Endodontics 009035100 Bornova Ä°zmir TurkeyNilay Kara Parlar, Ege University Department of Restorative Dentistry & Endodontics 009035100 Bornova Ä°zmir TurkeyHasan OruçoÄŸlu, Selçuk University Department of Endodontics Alaaddin Keykubat Kampüsü Konya TurkeyBerdan Aydın, Ege University Department of Restorative Dentistry & Endodontics 009035100 Bornova Ä°zmir Turkey Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267371 Wed, 11 Mar 2009 14:13:40 +0100 2267371 http://www.medworm.com/index.php?rid=2267370&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fe4618076427r4528%2F Abstract  A new concept was developed based on the experience gained in dental rehabilitation with implantation in the oral maxillofacial region. Despite the use of cooling systems, mechanically rotating instruments may damage the surrounding tissue due to the frictional heat generated. An alternative approach for bone removal is laser application. A preoperative plan was prepared. Laser ablation was performed in accordance with the data set on bovine bone using a navigation system. This new concept allows precise bone removal and adjustment of the laser power according to the preoperative plan. The power of the laser automatically decreases as it approaches the border of the planned cavity or important anatomical structures. The advantage of this approach is precise and sa... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267370 Wed, 11 Mar 2009 14:13:40 +0100 2267370 http://www.medworm.com/index.php?rid=2267372&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fmj42548434762606%2F Abstract  The aim of this study was to evaluate the mineral content of enamel etched at two different power settings with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser. Buccal, lingual and mesial or distal surfaces of five premolar teeth were cut, and three enamel slabs were obtained from each tooth. Fifteen enamel specimens were divided into three groups (1 W, 2 W and control) of five specimens each and subjected to Er,Cr:YSGG laser. The mean percentage weights of the five elements [calcium (Ca), potassium (K), magnesium (Mg), sodium (Na) and phosphorus (P)] in each slab were measured by inductively coupled plasma-atomic emission spectrometry (ICP-AES). One way analysis of variance (ANOVA) was used to analyze differences among the g... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267372 Wed, 11 Mar 2009 14:13:39 +0100 2267372 http://www.medworm.com/index.php?rid=2267373&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fv051gq9u66t05732%2F We examined the margins of 52 excised basal cell carcinomas by means of CM, and compared the results to conventional histological findings. For contrast enhancement, tissues were treated with 10% citric acid. The morphologic features of tumors seen in CM corresponded well to conventional light microscopy. Confocal assessment and light microscopical findings were consistent in 84.6%. If a tumor is clearly detectable by means of CM, the procedure of micrographic surgery can be accelerated. Negative confocal findings have yet to be confirmed by conventional microscopy. Applicability of CM is limited because of an inconsistent image quality that does not allow a reliable detection of small tumor nests. Further research into the handling of the samples and into specific contrast enhanceme... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267373 Wed, 11 Mar 2009 14:13:37 +0100 2267373 http://www.medworm.com/index.php?rid=2267375&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F4435173754075q83%2F Abstract  Salt is an essential and important dietary mineral for maintaining life. Currently, the issue of the potential benefit or damage from salt intake in chronic kidney disease patients is controversial. The attempt of this article is to bring into focus the potential role of elements particularly sodium, Na, and potassium, K, which are the main constituents of dietary salts, in kidney patients by using laser-induced breakdown spectroscopy (LIBS). LIBS spectra of different salt samples have been recorded in the spectral region 200–500 nm with spectral resolution 0.1 nm and in the spectral region 200–900 nm with spectral resolution 0.75 nm. Quantitative elemental study was carried out to determine the constituents of different types of common Ind... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267375 Wed, 11 Mar 2009 14:13:36 +0100 2267375 http://www.medworm.com/index.php?rid=2267374&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fc98156v13045m7q5%2F Abstract  A series of 49 patients diagnosed with osteonecrosis and all treated with latest-generation bisphosphonates was reviewed retrospectively to evaluate the use of erbium-doped: yttrium, aluminum, and garnet laser (Er:YAG) in terms of clinical outcome, and examine current trends from the clinical-therapeutic standpoint. Pathology reports on specimens submitted over the previous 7 years from either the mandible or the maxilla were reviewed; 49 patients were identified as having osteonecrosis of the jaws. For each of these cases, the medical history and profile were evaluated; 19 were treated with conservative therapy, 20 with radical surgery, and 10 with Er:YAG laser (2,940 nm). Of the 20 patients treated surgically (bone baquette, curettage, sequestrectomy o... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2267374 Wed, 11 Mar 2009 14:13:36 +0100 2267374 http://www.medworm.com/index.php?rid=2258871&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Frw0666641gg77j72%2F Content Type Journal ArticleDOI 10.1007/BF02995053 Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 4 Journal Issue Volume 4, Supplement 1 / March, 1989 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2258871 Tue, 10 Mar 2009 10:43:44 +0100 2258871 http://www.medworm.com/index.php?rid=2258872&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F9q4l4k2j33284744%2F Content Type Journal ArticleDOI 10.1007/BF02995052 Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 4 Journal Issue Volume 4, Supplement 1 / March, 1989 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2258872 Tue, 10 Mar 2009 10:43:43 +0100 2258872 http://www.medworm.com/index.php?rid=2258873&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fq60432657147p010%2F Content Type Journal ArticleDOI 10.1007/BF02995054 Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 Journal Volume Volume 4 Journal Issue Volume 4, Supplement 1 / March, 1989 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2258873 Tue, 10 Mar 2009 10:43:16 +0100 2258873 http://www.medworm.com/index.php?rid=2239102&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F30000335252257j7%2F Abstract  We studied the in vivo validity of dentinal fissure caries diagnosis by visual examination, bitewing radiography, and use of a laser-induced fluorescence device (DIAGNOdent). A total of 144 and second molars with macroscopically intact occlusal surfaces in 41 Chinese young adults were examined visually, by bitewing radiography, and by DIAGNOdent. Visual examination after pit and fissure opening was used as the reference standard. The sensitivity and specificity of detecting caries that had extended into the dentin were, respectively, 0.89 and 0.44 by visual detection of opacity or discoloration after air drying, 0.13 and 1.00 by bitewing radiography to detect radiolucency extending into the dentin, and 0.70 and 0.84 by DIAGNOdent testing with a cut-off score of 40... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2239102 Wed, 04 Mar 2009 09:13:40 +0100 2239102 http://www.medworm.com/index.php?rid=2221530&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fk65l2377kn178r01%2F Abstract  Our aim was to determine the usefulness of fluorescence examination and photodynamic therapy (PDT) for the management of perianal extramammary Paget’s disease. A 75-year-old woman underwent two courses of PDT. The first treatment was carried out with topically applied 5-aminolevulinic acid (ALA) to the affected area (2.5 × 2.5 cm2) 3 h before light treatment. We used ALA/protoporphyrin IX (PpIX)-mediated fluorescence to visualize the lesion and its margins. The lesion was treated with a 630 nm laser at 120 J/cm2. Forty days later, the residual lesion was given a second treatment at the same light dose after topical application of ALA and intravenous injection of HiPorfin. ALA/PpIX-mediated fluorescence served as a useful tool to visua... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2221530 Thu, 26 Feb 2009 11:28:32 +0100 2221530 http://www.medworm.com/index.php?rid=2221531&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fb72j9w14622j3240%2F We present a numerical model for the study of a general, two-dimensional, time-dependent, laser radiation transfer problem in a biological tissue. The model is suitable for many situations, especially when the external laser source is pulsed or continuous. We used a control volume discrete-ordinate method associated with an implicit, three-level, second-order, time-differencing scheme. In medical imaging by laser techniques, this could be an optical tomography forward model. We considered a very thin rectangular biological tissue-like medium submitted to a visible or a near-infrared laser source. Different cases were treated numerically. The source was assumed to be monochromatic and collimated. We used either a continuous source or a short-pulsed source. The transmitted radiance was... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2221531 Thu, 26 Feb 2009 11:28:28 +0100 2221531 http://www.medworm.com/index.php?rid=2215616&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fw46389541267490h%2F Abstract  The already known benefits produced by the interaction of coherent light (laser) with biologic tissues determine its use as an adjuvant in the treatment of several complications associated with diabetes. Non-coherent light, such as that emitted by light emitting diodes (LEDs), becomes a promising alternative, because of its low cost and easy handling in these applications. Thirty-six rats were given surgical dorsum lesions. The lesions for the control group did not receive any supporting therapy. The other groups were irradiated only once, 30 min after the establishment of the lesion, with LED (640 nm with 40 nm full bandwidth at half maximum) or laser (660 nm). The histomorphological and histomorphometrical parameters were quantified. The cohe... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2215616 Tue, 24 Feb 2009 09:27:16 +0100 2215616 http://www.medworm.com/index.php?rid=2215617&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm844537326072r66%2F Abstract  Excimer laser has been successfully applied to complex atherosclerotic plaques in acute coronary syndromes; however, its role in debulking in left main coronary artery disease has not been fully explored. Details of a series of 20 patients who underwent excimer laser revascularization of a spectrum of left main coronary artery lesions are presented. Twenty symptomatic patients who received excimer laser debulking were examined for procedural outcome and follow up results. The left main coronary artery was characterized as protected, semi-protected, poorly protected, or unprotected, depending on the presence or absence of patent bypass grafts to the left anterior descending (LAD) and circumflex (CX) arteries. A fully protected left main coronary artery (LMCA) was p... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2215617 Tue, 24 Feb 2009 09:27:15 +0100 2215617 http://www.medworm.com/index.php?rid=2215618&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fd8r3080073t51342%2F Abstract  A growth center of the mandible that contributes to its length and height is the mandibular condyle. Proliferation of prechondroblasts, followed by synthesis of the extracellular matrix and hypertrophy of the cartilage cells, governs the major part of condylar growth. The sample consisted of 54 male rats, weighing between 60 g and 80 g, divided randomly into three groups. Group I was the control group, group II was irradiated bilaterally, and group III was irradiated on the right side. Laser irradiation (λ = 904 nm, 2000 Hz, pulse length 200 ns and output power 4 mW) was performed, and the procedure was repeated after a 50-day interval. Two months later, the rats were killed. In a single blind manner the lengths of ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2215618 Tue, 24 Feb 2009 09:27:12 +0100 2215618 http://www.medworm.com/index.php?rid=2215619&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fvk371k34222h63u1%2F Abstract  A phantom of human port wine stain (PWS) skin, previously described by the authors, that takes into account its light propagation and scattering properties, was used to model varying depths of blood within PWS skin. Digital images of these phantoms were then acquired under controlled conditions, and the colour information was abstracted with a digital image processing suite. These colour data were analysed quantitatively for each depth of blood, and the relationship between depth of blood and colour was defined. A linear relationship was observed between depth of blood within the phantom and hue, hue being an intuitive measure of how colour is perceived by the human eye. As PWS clearance by laser treatment is dependant, to a large degree, on vessel depth within th... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2215619 Tue, 24 Feb 2009 09:27:08 +0100 2215619 http://www.medworm.com/index.php?rid=2199455&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fh683538855022146%2F We describe a novel scanning laser ophthalmoscope (SLO)-based on a video-rate second harmonic generation imaging microscope. A titanium:sapphire femtosecond laser was coupled to a modified SLO. The laser beam was scanned over the sample, and the light produced by second harmonic generation (SHG) was collected for imaging at video-speed. The device was used for imaging the lamina cribrosa (LC) of enucleated pig eyes. A resolution comparable to that of commercial multiphoton microscopes was reached. The SHG images were used for determining the average pore size of the LC determined from the images; the pressure dependence of the pore size was studied by the artificial increasing of the hydrostatic pressure in the eye. A pressure increase of 44.3 mmHg enlarged the average pore size... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2199455 Wed, 18 Feb 2009 09:32:01 +0100 2199455 http://www.medworm.com/index.php?rid=2190304&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F8pj13886264h7447%2F Abstract  A long-lasting dysfunction of the eustachian tube seems to be the etiologic origin for development of chronic otitis media (COM) with mesotympanic perforation, otitis media with effusion (OME), and chronic atelectasis of the middle ear. Surgical interventions in the middle ear generally treat the sequelae of the tube dysfunction but not the dysfunction itself. This prospective clinical study investigated how far fiber-guided laser ablation of the posterior half of the epipharyngeal tubal ostium led to better middle ear ventilation in the otologic disease patterns mentioned below. There were 38 adult patients included in the analysis. The patients in one group had a perforated tympanic membrane [COM before primary tympanoplasty (n = 14) or revision tympanoplasty... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2190304 Sat, 14 Feb 2009 10:15:15 +0100 2190304 http://www.medworm.com/index.php?rid=2190306&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F76106n7664pt6m74%2F In this study, erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser of various laser systems was used for 12 sinus bone grafts in ten patients, and the efficiency of the laser was evaluated according to the osteotomy time and the rate of sinus membrane perforation in the clinical results; the mechanism is described. Eight of the 12 procedures were performed by direct sinus grafting with the Er,Cr:YSGG laser without membrane perforation (perforation ratio 33.3%). Operating time for bony window osteotomy with laser alone was 2–7 minutes [3 min 24 s on average; 3.4 ± 1.4 min (mean Â± standard deviation)], and all the implants placed immediately were successful. Content Type Journal ArticleCategory Brief ReportDOI 10.1007/s10103-009-... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2190306 Sat, 14 Feb 2009 10:15:14 +0100 2190306 http://www.medworm.com/index.php?rid=2190305&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F75076w53510jq26m%2F Abstract  Lower-extremity venous insufficiency is a common condition, associated with considerable health care costs. Endovenous laser ablation is increasingly used as therapy, but its mechanism of action is insufficiently understood. Here, direct absorption of the laser light, collapsing steam bubbles and direct fiber-wall contact have all been mentioned as contributing mechanisms. Because fiber tips have reported temperatures of 800–1,300°C during endovenous laser ablation, we sought to assess whether heat conduction from the hot tip could cause irreversible thermal injury to the venous wall. We approximated the hot fiber tip as a sphere with diameter equal to the fiber diameter, having a steady state temperature of 800°C or 1,000°C. We computed venous wall temperatu... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2190305 Sat, 14 Feb 2009 10:15:14 +0100 2190305 http://www.medworm.com/index.php?rid=2190307&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F7705t2w42h2310wv%2F Abstract  The purpose of this study was to investigate the efficiency of hand instrumentation and laser irradiation on calculus removal from the root surfaces, in vitro. Thirty-two human teeth, extracted for periodontal reasons, were used in this study. Root surfaces of single-rooted teeth were treated by different methods including (1) conventional hand instruments; (2) hand instruments and tetracycline-hydrochloride (Tet-HCl); (3) erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser irradiation, setting I (short pulse); (4) Er,Cr:YSGG laser irradiation, setting II (long pulse). Three premolar teeth, extracted for orthodontic reasons, served as control. The morphology of the root surfaces was evaluated by light and scanning electron ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2190307 Sat, 14 Feb 2009 10:15:13 +0100 2190307 http://www.medworm.com/index.php?rid=2181629&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F354525hu20514430%2F In conclusion, the DPSS laser induced better or similar polymerization in terms of polymerization shrinkage and color change in composite resins compared with those of the QTH lamp-based and LED units. Content Type Journal ArticleCategory Original ArticleDOI 10.1007/s10103-009-0644-9Authors Yun-Hoa Jung, Pusan National University College of Dentistry and Medical Research Institute Busan South KoreaBong-Hae Cho, Pusan National University College of Dentistry and Medical Research Institute Busan South KoreaKyung-Soo Nah, Pusan National University College of Dentistry and Medical Research Institute Busan South KoreaHyung-Il Kim, Pusan National University Department of Dental Materials, Medical Research Institute and College of Dentistry Busan South KoreaYong Hoon Kwon, Pusan National Un... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2181629 Wed, 11 Feb 2009 07:00:17 +0100 2181629 http://www.medworm.com/index.php?rid=2172074&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F2377k81t5p771326%2F Abstract  With the aim of accelerating the regenerative processes, the objective was to study the influence of gallium–aluminum–arsenide (GaAlAs) laser (660 nm) on functional and histomorphological recovery of the sciatic nerve in rats. The sciatic nerves of 12 Wistar rats were crushed divided into two groups: control and laser therapy. For the latter, GaAlAs laser was utilized (660 nm, 4 J/cm2, 26.3 mW and 0.63 cm2 beam), at three equidistant points on the lesion, for 20 days. Comparison of the sciatic functional index (SFI) showed that there was a significant difference only between the pre-lesion value of the laser therapy group and that after the 21st day in the control group. It was concluded that the parameters and methods utilized dem... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2172074 Sat, 07 Feb 2009 10:14:34 +0100 2172074 http://www.medworm.com/index.php?rid=2172075&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fh14480r043775w21%2F Abstract  Photofrin photodynamic therapy (PDT) caused a dose-dependent decrease of enzymatic cell detachment by trypsin/ethylenediamine tetra-acetic acid (EDTA) in human glioma U251n and U87 cells. This happened coincidently with the increase of intracellular free calcium ([Ca2+]i). Thapsigargin, which increased [Ca2+]i, induced further decrease in enzymatic cell detachment and increased cytotoxicity. Opposite effects were observed when 1,2-bis(2-aminophenoxy) ethane-N,N,N′,N′-tetra-acetic acid tetrakis, an intracellular Ca2+ chelator, was used. PDT-induced changes in [Ca2+]i and cell detachment were not blocked by calcium channel antagonists nickel (Ni2+) or nimodipine, nor were they altered when cells were irradiated in a buffer free from Ca2+ and magnesium (Mg2+), sugge... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2172075 Sat, 07 Feb 2009 10:14:33 +0100 2172075 http://www.medworm.com/index.php?rid=2140823&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F8006580j718xk783%2F Abstract  The study defined the scientific evaluation of glycemic elements of extracts of Cynodon dactylon and Musa paradisiaca. A dose of 500 mg/kg body weight (bw) of C. dactylon produced maximum falls of 23.2% and 22.8% in blood glucose levels of normoglycemic rats during studies of fasting blood glucose and glucose tolerance, respectively, whereas the same dose of M. paradisiaca produced a rise of 34.9% and 18.4%. In diabetic rats during glucose tolerance tests, a fall of 27.8% and a rise of 17.5% were observed with the same dose of C. dactylon and M. paradisiaca, respectively. Laser-induced breakdown spectroscopy used for detection of glycemic elements present in both the extracts indicated that C. dactylon was rich in magnesium (Mg), whereas M. paradisiaca was rich ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2140823 Tue, 27 Jan 2009 08:02:15 +0100 2140823 http://www.medworm.com/index.php?rid=2140822&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fqj3481060j8j3207%2F Abstract  The study investigated the effects of low-level laser radiation and epidermal growth factor (EGF) on adult adipose-derived stem cells (ADSCs) isolated from human adipose tissue. Isolated cells were cultured to semi-confluence, and the monolayers of ADSCs were exposed to low-level laser at 5 J/cm2 using 636 nm diode laser. Cell viability and proliferation were monitored using adenosine triphosphate (ATP) luminescence and optical density at 0 h, 24 h and 48 h after irradiation. Application of low-level laser irradiation at 5 J/cm2 on human ADSCs cultured with EGF increased the viability and proliferation of these cells. The results indicate that low-level laser irradiation in combination with EGF enhances the proliferation and maintenance... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2140822 Tue, 27 Jan 2009 08:02:15 +0100 2140822 http://www.medworm.com/index.php?rid=2104020&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F52517x5577153573%2F Content Type Journal ArticleCategory Letter to the EditorDOI 10.1007/s10103-008-0621-8Authors Stavros Gravas, University Hospital of Larissa Department of Urology Feidiou 6–8 412 21 Larissa GreeceVassilis Tzortzis, University Hospital of Larissa Department of Urology Feidiou 6–8 412 21 Larissa GreeceMichael D. Melekos, University Hospital of Larissa Department of Urology Feidiou 6–8 412 21 Larissa Greece Journal Lasers in Medical ScienceOnline ISSN 1435-604XPrint ISSN 0268-8921 (Source: Lasers in Medical Science) Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2104020 Tue, 13 Jan 2009 08:15:29 +0100 2104020 http://www.medworm.com/index.php?rid=2064800&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fhvk2056uj31312jm%2F Abstract  We performed laser-induced breakdown spectroscopy (LIBS) for the in situ quantitative estimation of elemental constituents distributed in different parts of kidney stones obtained directly from patients by surgery. We did this by focusing the laser light directly on the center, shell, and surface of the stones to find the spatial distribution of the elements inside the stone. The elements detected in the stones were calcium, magnesium, manganese, copper, iron, zinc, strontium, sodium, potassium, carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur, and chlorine (Cl), etc. We optimized the LIBS signals by varying the laser energy from 10 mJ to 40 mJ to obtain the best signal-to-background and signal-to-noise ratios. We estimated the quantities of differ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2064800 Tue, 23 Dec 2008 08:03:53 +0100 2064800 http://www.medworm.com/index.php?rid=2064801&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F93k5m30514hnt116%2F Abstract  The aim of this study was to analyze the influence of aluminum gallium arsenide (AlGaAs) laser (660 nm) on the myelin sheath and functional recovery of the sciatic nerve in rats. The sciatic nerves of 12 Wistar rats were subjected to injury through neurotmesis and epineural anastomosis, and the animals were divided into two groups: group 1 was the control and group 2, underwent low-level laser therapy (LLLT). After the injury, AlGaAs laser at 660 nm, 4 J/cm2, 26.3 mW and beam area of 0.63 cm2 was administered to three equidistant points on the injury for 20 consecutive days. In the control group the mean area of the myelin impairment was 0.51 (± 0.11) on day 21 after the operation, whereas this value was 1.31 (± 0.22) in the LLLT group. S... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2064801 Tue, 23 Dec 2008 08:03:49 +0100 2064801 http://www.medworm.com/index.php?rid=2016408&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg112732245154kq0%2F Abstract  Our aim was to investigate the immediate effects of bilateral, 830 nm, low-level laser therapy (LLLT) on high-intensity exercise and biochemical markers of skeletal muscle recovery, in a randomised, double-blind, placebo-controlled, crossover trial set in a sports physiotherapy clinic. Twenty male athletes (nine professional volleyball players and eleven adolescent soccer players) participated. Active LLLT (830 nm wavelength, 100 mW, spot size 0.0028 cm2, 3–4 J per point) or an identical placebo LLLT was delivered to five points in the rectus femoris muscle (bilaterally). The main outcome measures were the work performed in the Wingate test: 30 s of maximum cycling with a load of 7.5% of body weight, and the measurement of blood lactate (... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2016408 Fri, 05 Dec 2008 09:28:02 +0100 2016408 http://www.medworm.com/index.php?rid=2016407&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F1826738wu2560655%2F This study investigated how the dose of ALA and the colour of the illuminating light influenced the biological effect. Twenty-seven patients were enrolled into a randomised controlled trial of red versus green (635 nm or 512 nm) laser light activation for the eradication of HGD with ALA-PDT in Barrett’s oesophagus. A further 21 patients were subsequently treated with the most effective regimen. Regular endoscopic follow-up with quadrantic biopsies every 2 cm was performed. The primary outcome measure was eradication of HGD. Patient’s receiving ALA at 30 mg/kg relapsed to HGD more than those receiving 60 mg/kg (P = 0.03). Additionally, for those treated with ALA 60 mg/kg, red laser light was more effective than green laser light (P = 0.008). Ka... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2016407 Fri, 05 Dec 2008 09:28:02 +0100 2016407 http://www.medworm.com/index.php?rid=2016409&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F0722v511x8368t17%2F Abstract  The possible beneficial effects of a specially pulsed electric field (PEF) on wound healing were investigated in this study. We made a pair of triangular, full-thickness, dorsal incisions in the skin of 32 healthy male mice (one control group and three exposure groups). The treatment groups were kept between parallel plates in a partially insulated exposed environment. Group I was exposed to an electric field intensity of 10 kV/m, group II was exposed to 1.9 kV/m, and group III was exposed to 0.9 kV/m. PEFs were applied to the subjects for 20–22 h and 8 consecutive days. We determined the differences in wound recovery between the groups based on the following parameters: collagen fiber density, inflammatory infiltration density,... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2016409 Fri, 05 Dec 2008 09:28:01 +0100 2016409 http://www.medworm.com/index.php?rid=2013145&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg1g2656300375210%2F Abstract  Low-level laser therapy (LLLT) studies on the musculoskeletal and cartilage tissues of rabbits have reported conflicting results. We aimed to investigate the effects of 630 nm and 860 nm low-level laser on injured rabbit cartilage. After punching 5 mm holes in both ears of ten rabbits, we grouped the rabbits randomly. The punched holes of the laser-treated group were irradiated with 630 nm and 860 nm diode laser on days 3–5 and then every other day until day 20. In both laser and control groups, the hole diameters were measured weekly. Histological evaluation was carried out on day 30. The inter-group difference in hole diameters was not significant. Mann–Whitney U tests showed significant inter-group differences in histological va... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2013145 Wed, 03 Dec 2008 08:28:43 +0100 2013145 http://www.medworm.com/index.php?rid=2013144&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fg1188605417513q0%2F We present and review the contribution of laser speckle contrast techniques to the field of perfusion visualization and discuss the development of the techniques. Content Type Journal ArticleCategory Review ArticleDOI 10.1007/s10103-008-0626-3Authors Matthijs Draijer, University of Twente Biophysical Engineering Group Institute for Biomedical Technology Enschede The NetherlandsErwin Hondebrink, University of Twente Biophysical Engineering Group Institute for Biomedical Technology Enschede The NetherlandsTon van Leeuwen, University of Twente Biophysical Engineering Group Institute for Biomedical Technology Enschede The NetherlandsWiendelt Steenbergen, University of Twente Biophysical Engineering Group Institute for Biomedical Technology Enschede The Netherlands Journal Lasers i... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2013144 Wed, 03 Dec 2008 08:28:43 +0100 2013144 http://www.medworm.com/index.php?rid=2013146&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F084114452322674q%2F The objective of this study was to test pain reduction, as well as lesional clearance, by combining pneumatic skin flattening (PSF) technology with a pulsed dye laser in the treatment of vascular lesions. Twenty-one patients (three of them children) were treated for vascular lesions, mostly PWSs (13 patients). The patients were treated with a 595 nm pulsed dye laser operated at energies of 5.75–13.25 (median 9.25) J/cm2. Acute pain was evaluated in all 21 patients. Topical anaesthetic (EMLA cream) was applied before treatment in six cases. Identical energies were applied to both sites. The pain during PSF treatment was compared to pain during regular treatment without PSF. Blanching response to treatment was evaluated in 18 patients after 6–12 weeks. Significant pain red... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=2013146 Wed, 03 Dec 2008 08:28:42 +0100 2013146 http://www.medworm.com/index.php?rid=1998495&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F371305ru6g6g6q42%2F Abstract  The influence of sex hormones on the human uterine cervix is likely to be important in the process of cervical ripening. Frequency domain near-infrared spectroscopy (FD-NIRS) was used to investigate non-invasively the changes in the optical properties that reflect physiologic parameters and tissue composition of the uterine cervix in the different phases of the menstrual cycle. Twenty premenopausal and nine postmenopausal women were examined. Optical properties of the uterine cervix were measured, and physiological parameters [concentration of water, oxyhemoglobin (O2Hb) and deoxyhemoglobin (HHb), total hemoglobin (tHb), oxygen saturation (StO2), water, and scattering power] were calculated. Analysis of variance (ANOVA) was used to test for statistical significance.... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1998495 Fri, 28 Nov 2008 14:08:27 +0100 1998495 http://www.medworm.com/index.php?rid=1984346&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Ff341176347016v17%2F In this study, three mathematical modeling methods for five selected techniques were implemented so that we could understand the mechanisms that enhance light propagation in skin. The five techniques included the increasing of the power and diameter of a laser beam, the application of a hyperosmotic chemical agent (HCA), and the whole and partial compression of the skin surface. The photon density profile of the five techniques was solved with three mathematical modeling methods: the finite element method (FEM), the Monte Carlo method (MCM), and the analytic solution method (ASM). We cross-validated the three mathematical modeling results by comparing photon density profiles and analyzing modeling error. The mathematical modeling results verified that the penetration depth of light ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1984346 Sun, 23 Nov 2008 06:48:57 +0100 1984346 http://www.medworm.com/index.php?rid=1974343&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fm723538g72423330%2F Abstract  The effects of neodymium:yttrium–aluminium–garnet (Nd:YAG) laser and silicon carbide (SiC) paper on the surface micro-topography of titanium-6 aluminium-4 vanadium (Ti6Al4V) alloy were examined in relation to the response of bone cells. The study was performed in three distinct stages: (1) after surface treatment of samples by laser and SiC paper, the surface hardness, surface roughness, corrosion resistance and surface tension were evaluated; (2) the growth of mouse connective tissue fibroblast cells (L-929) on untreated and treated samples was assessed in vitro; (3) the response of goat osteoblast cells to untreated and treated implanted samples was assessed in vivo. The surface roughness varied between 7 ± 0.02 for laser-treated samples (LTSs) at 140&n... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1974343 Wed, 19 Nov 2008 08:10:21 +0100 1974343 http://www.medworm.com/index.php?rid=1967978&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fv5616080j4128p4p%2F This study evaluated the use of red and infrared lasers on tissue surrounding the femurs of 60 rats randomly divided into three groups after implantation of bioabsorbable plates. The control group were not subjected to laser irradiation; group A was treated with red laser [indium–gallium–aluminum–phosphide (InGaAlP) laser, wavelength 685 nm, 35 mW, continuous wave (CW), Ø = 0.06 cm, 2.23 min], and group B was subjected to infrared laser [gallium–aluminum–arsenium (GaAlAs) laser, wavelength 830 nm, 50 mw, CW, Ø = 0.06 cm, 1.41 min], both at 10 J/cm2. Samples were stained with hematoxylin and eosin (H&E) and examined microscopically. Results showed that the laser irradiation had had a positive photobiomodulation effect on ... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1967978 Sun, 16 Nov 2008 11:20:43 +0100 1967978 http://www.medworm.com/index.php?rid=1967980&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F4t2j2638k752t671%2F Abstract  The aim of this study was to evaluate the influence of erbium:yttrium–aluminum–garnet (Er:YAG) laser compared with traditional treatment on dentin permeability to calcitonin and sodium alendronate. Forty bovine roots were sectioned and divided into eight groups. Groups 1 and 2 (G1/G2) were immersed in saline solution; G1T/G2T were immersed in ethylene diamine tetra-acetic acid plus sodium lauryl ether sulfate (EDTA-T) and sodium hypochlorite (NaOCl); G1I/G2I were irradiated with Er:YAG laser (2.94 Î¼m, 6 Hz, 40.4 J/cm2); G1TI/G2TI were immersed in EDTA-T, NaOCl and subjected to Er:YAG irradiation. After 4 h the radioactivity of the saline solution was measured. Statistical analysis revealed a significant difference (P < 0.05) when the... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1967980 Sun, 16 Nov 2008 11:20:42 +0100 1967980 http://www.medworm.com/index.php?rid=1967979&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2Fl6517385070641up%2F Abstract  The aim of this in vitro study was to evaluate some parameters of dental etching when irradiated with an erbium, chromium:yttrium–scandium–gallium–garnet (Er,Cr:YSGG) laser. One-hundred sound human third molars were selected and randomly distributed into ten groups (n = 10). The class V cavities of group 1 (control) were prepared with a bur and etched with 37% phosphoric acid, while groups G2 to G10, were prepared with laser (5 W, 88.46 J/cm2, 90/70% air/water) and etched with the following powers: G3 and G4, 0.25 W; G5 and G6, 0.5 W; G7 and G8, 0.75 W; G9 and G10, 1 W. Group G2 received no laser etching. Prior to restoration, G2, G4, G6, G8 and G10 received acid etching. After restoration, all samples were submitted to a... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1967979 Sun, 16 Nov 2008 11:20:42 +0100 1967979 http://www.medworm.com/index.php?rid=1959437&cid=s_33333_72_f&fid=33333&url=http%3A%2F%2Fwww.springerlink.com%2Fcontent%2F5h722303068mg097%2F The objective of this study was to investigate whether low level laser therapy (LLLT) could reduce bronchial hyper-responsiveness (BHR) induced by tumour necrosis factor-alpha (TNF-α) modulating the metabolism of inositol phosphate (IP) in bronchial smooth muscle cells (BSMCs). The study was on 28 Wistar rats, randomly divided into four groups. Irradiation (1.3 J/cm2) was administered 5 min and 4 h after bronchial smooth muscle (BSM) had been suspended in TNF-α baths, and the contractile response-induced calcium ion (Ca2+) sensitization was measured. The BSMCs were isolated, and the IP accumulation was measured before and after TNF-α immersion in the groups that had been irradiated or not irradiated. BSM segments significantly increased contraction 24 h after TNF... Lasers in Medical Science journals http://www.medworm.com/rss/comments.php?id=1959437 Thu, 13 Nov 2008 15:42:51 +0100 1959437