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Apoptosis in pulp elimination during physiological root resorption in human primary teeth.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Pulp samples of 50 healthy human teeth with indication for extraction were examined to evaluate the role of apoptosis in pulp elimination during physiological root resorption. Two groups were formed: a test group (n=30) composed of pulp samples of primary teeth with physiological root resorption and a control group (n=20) composed of pulp samples of permanent maxillary third molars. Morphological evidence of apoptosis as well as in situ detection of cellular DNA fragmentation by TUNEL assay and detection of internucleosomal pattern of fragmentation of the genomic DNA by electrophoresis were observed. The apoptotic inde...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Rodrigues LV, Vasconcelos AC, Campos PA, Brant JM Tags: Braz Dent J Source Type: journals

Effect of sodium selenite on bone repair in tibiae of irradiated rats.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study evaluated the radioprotective effect of sodium selenite on the bone repair process in tibiae of female rats. For such purpose, 100 female Wistar rats (Rattus norvegicus, albinus) were randomly assigned to 4 groups (n=25), according to the treatment received: administration of distilled water (control); administration of sodium selenite; gamma radiation; and administration of sodium selenite plus gamma radiation. A bone defect was prepared on both tibiae of all animals. Three days after surgery, the gamma radiation and selenium/gamma radiation groups received 8 Gy gamma rays on the lower limbs. Five animals per g...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Rocha AS, Ramos-Perez FM, Bóscolo FN, Manzi FR, Cchicarelo M, Almeida SM Tags: Braz Dent J Source Type: journals

Clinical evaluation of a dermic allograft in procedures to increase attached gingiva width.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to clinically evaluate the use of alloderm to increase the width of attached gingiva. Nine patients were selected. The inclusion criteria were: attached gingiva smaller than 1 mm; Miller's class I and II gingival recession; patients able to attend control dental appointments; absence of periodontal pocket and endodontic treatment in the neighboring area where the acellular dermal graft would be placed. The clinical evaluation included: allograft shrinkage 7, 14, 21, 30, 60 and 90 days after surgery; width of attached gingiva at the end of the study; difference in color and mobility of allograf...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Vieira Ede O, Fidel Junior RA, Figueredo CM, Fischer RG Tags: Braz Dent J Source Type: journals

In vitro potential cytotoxicity of an adhesive system to alveolar macrophages.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, chemical components released from SB in aqueous environment were highly toxic to cell culture and thus an inflammatory pulpal response should be considered during the clinical application of dental adhesives. PMID: 19784463 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Porto IC, Andrade AK, Guênes GM, Ribeiro AI, Braz R, Castro CM Tags: Braz Dent J Source Type: journals

Effect of fluoride-containing solutions on the surface of cast commercially pure titanium.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, fluoride-containing solutions (pH 7.0) used as mouthwashes do not damage the surface of cast CP Ti and can be used by patients with titanium-based restorations. PMID: 19784464 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Toniollo MB, Tiossi R, Macedo AP, Rodrigues RC, Ribeiro RF, Mattos Mda G Tags: Braz Dent J Source Type: journals

Effect of experimental heat treatment on mechanical properties of resin composites.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to verify the influence of an experimental heat treatment (170 masculineC/10 min) using a casting furnace on the mechanical properties (hardness and flexural strength) of 2 commercial direct resin composites (TPH Spectrum and Filtek P60) compared to a commercial indirect resin system (BelleGlass). Heat treatment temperature was determined after thermal characterization by thermogravimetry (TG) and differential scanning calorimetry (DSC). Data was analyzed by ANOVA and Tukey's test at 5% significance level. There was statistical significance for the main factor heat treatment (p=0.03) and compo...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Santana IL, Lodovici E, Matos JR, Medeiros IS, Miyazaki CL, Rodrigues-Filho LE Tags: Braz Dent J Source Type: journals

Effectiveness of different final irrigation protocols in removing debris in flattened root canals.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the final irrigation protocols evaluated in this study using the Luer syringe presented similar performance in the removal of debris from the apical third of flattened root canals. PMID: 19784466 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Nadalin MR, Perez DE, Vansan LP, Paschoala C, Souza-Neto MD, Saquy PC Tags: Braz Dent J Source Type: journals

Use of therapeutic laser for prevention and treatment of oral mucositis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, laser reduced the frequency and severity of OM, suggesting that therapeutic laser can be used both as a new form of prevention and treatment of OM. PMID: 19784467 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Khouri VY, Stracieri AB, Rodrigues MC, Moraes DA, Pieroni F, Simões BP, Voltarelli JC Tags: Braz Dent J Source Type: journals

Attitudes and behavior of dental students concerning infection control rules: a study with a10-year interval.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The study compared the attitudes and behavior of 4th-year dental students regarding infection control rules in 1995 and 2005. Self-administrated questionnaires were applied to 592 students at 5 different dental schools in 1995 (n=350) and in 2005 (n=242). The chi-square and Fisher's exact tests were used for statistical analysis of data. Significance level was set at p<0.05. The response rate was 90.3% in 1995 and 81.0% in 2005. There was no improvement in the use of rubber gloves (p=0.316), face masks (p=0.572) or gowns (p=0.862) between 1995 and 2005. There was a lesser frequency of the use of protective eyewear i...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Abreu MH, Lopes-Terra MC, Braz LF, Rímulo AL, Paiva SM, Pordeus IA Tags: Braz Dent J Source Type: journals

Influence of psychopathologies on craniomandibular disorders.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, the craniomandibular index was applied to valuate signs and symptoms of CMD in 60 dentate patients, who were assigned to 2 groups: symptomatic (n=35) and asymptomatic (n=25). An interview on psychopathologies was carried out with the aim to detect the presence of some mood disorders, such as depression, dysthymic and bipolar I disorders. Among these disturbances, depression was the most significant aspect to be reported (p<0.05) since it was present in most symptomatic patients. This important interaction was also significantly correlated (p<0.05) with the Palpation Index. These results suggest that ps...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Penna PP, Recupero M, Gil C Tags: Braz Dent J Source Type: journals

Double-blind, crossover, placebo-controlled clinical trial with clobetasol propionate in desquamative gingivitis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to evaluate the efficacy of a 0.05% clobetasol propionate ointment administered in trays to 22 patients with desquamative gingivitis in a double-blind, crossover, placebo-controlled trial. Patients received container number 1 and were instructed to apply the ointment 3 times a day for 2 weeks, and to reduce the application to once a day in the third week. Next, the patients were then instructed to discontinue the treatment for 2 weeks, and were then given container 2, used in the same way and for the same length of time as container 1. Regarding signs, 17 patients presented some improvement, w...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Motta AC, Domaneschi C, Komesu MC, Souza Cda S, Aoki V, Migliari DA Tags: Braz Dent J Source Type: journals

Electromyographic activity of masticatory muscles in women with osteoporosis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was to analyze the electromyographic (EMG) activity and the maximal molar bite force in women diagnosed with osteoporosis in the maxillary and mandibular regions, considering the habits and conditions that lead to development of generalized skeletal bone loss, including on face bones, can disturb the functional harmony of the stomatognathic system. Twenty-seven women with mandibular and maxillary osteoporosis and 27 healthy controls volunteered to participate in the study. A 5-channel electromyographer was used. Muscle activity was evaluated by means of EMG recordings of the masticatory muscul...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Siéssere S, Sousa LG, Lima Nde A, Semprini M, Vasconcelos PB, Watanabe PC, Rancan SV, Regalo SC Tags: Braz Dent J Source Type: journals

Denture-related hyperplasia: a clinical study of a Turkish population group.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Inflammatory fibrous hyperplasia (epulis fissuratum) (IFH) and inflammatory papillary hyperplasia (IPH) are oral mucosal diseases caused by ill-fitting denture wearing. A study was carried out on a group of Turkish people consisted of 131 female and 39 male complete denture wearers (n= 170) distributed in two age groups (30-60 and 60-80 years old). The analysis of data collected from patients showed that while the incidence of IFH was higher in women than in men, the incidence of IPH was similar. Most lesions were found in the 30-60 year-old group. The incidence of lesions increased as the denture wearing period increa...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Canger EM, Celenk P, Kayipmaz S Tags: Braz Dent J Source Type: journals

Floor of the nose mucosa lysis and labial abscess caused by a bee sting.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Hymenoptera order includes bees, which have a stinging apparatus at the tail capable of delivering venom to the affected tissues. Myocardial infarction, acute renal failure, Necrotizing fasciitis, fatal infection and hemifacial asymmetry, are some of the unusual reactions reported following hymenoptera stings. This paper reports a case of bee sting in the right floor of the nose that mimicked an odontogenic infection affecting the upper lip, canine space and nasal cavity such as in cases of infection secondary to pulpal or periodontal pathology of the anterior teeth. After a thorough clinical and radiographic examinati...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Alemán Navas RM, Martínez Mendoza MG, Herrera H, Herrera HP Tags: Braz Dent J Source Type: journals

Immediate implants placed into infected sockets: a case report with 3-year follow-up.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This article describes the procedure of immediate implant placement in the anterior maxilla replacing teeth with chronic periapical lesions, which were condemned due to endodontic lesions persisting after failed endodontic treatment and endodontic surgery, and discusses the relationship between the procedure and periapical lesions. Surgical removal of hopeless teeth 11, 12 and 21 was performed conservatively in such a way to preserve the anatomy and gingival esthetics. A second surgical access was gained at the apical level, allowing the debridement of the surgical chamber for elimination of the periapical lesion, visual o...
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: Naves Mde M, Horbylon BZ, Gomes Cde F, Menezes HH, Bataglion C, Magalhães D Tags: Braz Dent J Source Type: journals

Management of a complex dentoalveolar trauma: a case report.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This paper describes the case of a 12-year-old male patient who presented a severe lateral luxation of the maxillary central incisors due to a bicycle fall. Treatment involved suture of the soft tissues lacerations, and repositioning and splinting of the injured teeth, followed by endodontic treatment and periodontal surgery. After a 2-year follow-up, clinical and radiographic evaluation revealed that the incisors presented satisfactory esthetic and functional demands. PMID: 19784475 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 29, 2009 Category: Dentistry Authors: De Rossi M, De Rossi A, Queiroz AM, Nelson Filho P Tags: Braz Dent J Source Type: journals

Effect of biofunctionalized implant surface on osseointegration: a histomorphometric study in dogs.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, biofunctionalization of the implant surface might interfere in the bone apposition around implants, especially in terms of bone density. Different concentrations of bioactive peptide lead to different results. PMID: 19738939 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Barros RR, Novaes AB, Papalexiou V, Souza SL, Taba M, Palioto DB, Grisi MF Tags: Braz Dent J Source Type: journals

Subcutaneous tissue response of isogenic mice to calcium hydroxide-based pastes with chlorhexidine.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the Calen paste mixed with 0.4% CHX allowed an adequate tissue response, whereas the UltraCal paste mixed with 2% CHX showed unsatisfactory results. PMID: 19738940 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Silva RA, Assed S, Nelson-Filho P, Silva LA, Consolaro A Tags: Braz Dent J Source Type: journals

In vitro antimicrobial activity of acroseal, polifil and epiphany against Enterococcus faecalis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Using the agar diffusion method, this study evaluated the in vitro antimicrobial activity of the commercial endodontic sealers Acroseal and Epiphany, a castor-oil based experimental sealer, Polifil, and a primer agent (Epiphany self-etching primer), against Enterococcus faecalis. Zinc oxide and eugenol cement (ZOE) served as control. Five wells per dish were made at equidistant points and immediately filled with the test and control materials. After incubation of the dishes at 37 degrees C for 24 h and 48 h, the diameter of the zones of microbial growth inhibition produced around the wells was measured (in mm) with a m...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Pinheiro CR, Guinesi AS, Pizzolitto AC, Bonetti-Filho I Tags: Braz Dent J Source Type: journals

Rat subcutaneous tissue response to modified Portland Cement, a new mineral trioxide aggregate.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was compare the biocompatibility of modified Portland cement (CPM) and mineral trioxide aggregate (MTA) in a subcutaneous rat model. Twenty-four male Wistar rats were used. Three silicon tubes were placed on the dorsal subcutaneous tissue of each animal: one tube contained MTA, one tube contained CPM and the other was an empty tube. The rats were sacrificed in 3 groups of 8 animals at 7, 14 and 30 postoperative days, respectively. Tissue samples were fixed in 10% buffered formalin, embedded in paraffin, and serial sections were cut and stained with hematoxylin and eosin, Masson Trichrome and L...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Martínez Lalis R, Esaín ML, Kokubu GA, Willis J, Chaves C, Grana DR Tags: Braz Dent J Source Type: journals

Cytotoxicity of endodontic irrigants containing calcium hydroxide and sodium lauryl sulphate on fibroblasts derived from mouse L929 cell line.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the association of calcium hydroxide and SLS (HCT20) combines the beneficial properties of these solutions and was not harmful to the fibroblast cell line, seeming to be a suitable endodontic irrigating solution. PMID: 19738943 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Barbosa SV, Barroso CM, Ruiz PA Tags: Braz Dent J Source Type: journals

Effect of gamma irradiation on fluoride release and antibacterial activity of resin dental materials.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study evaluated the effect of gamma irradiation on fluoride release and antibacterial activity of FluroShield (FS) and Clearfil Protect Bond (CPB). Four groups were formed: G1-FS + gamma; G2-FS without gamma; G3-CPB + gamma; G4-CPB without gamma. For fluoride release analysis, 12 disks of each material were prepared and covered with nail polish, except for one side (50.4 mm(2) area). G1 and G3 were sterilized with a 14.5 KGy dose at 27 degrees C for 24 h, while G2 and G4 (controls) were not sterilized and were maintained under the same time and temperature conditions. Fluoride release measurements were made in duplica...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Carvalho FG, Fucio SB, Pascon FM, Kantovitz KR, Correr-Sobrinho L, Puppin-Rontani RM Tags: Braz Dent J Source Type: journals

Effect of ridge lap surface treatment and thermocycling on microtensile bond strength of acrylic teeth to denture base resins.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study evaluated the effect of denture base polymer type (heat- and microwave-polymerized), ridge lap surface treatment (with and without methyl methacrylate-MMA etching) and thermocycling on the microtensile bond strength (microTBS) of Biotone acrylic teeth. Flat-ground, ridge-lap surface of posterior artificial teeth were bonded to cylinders of each denture base resin, resulting in the following groups (n=6): G1a - Clássico/with MMA etching; G1b - Clássico/without MMA etching; G2a - OndaCryl/with MMA etching; G2b - OndaCryl/without MMA etching. Rectangular bar specimens with a cross-sectional area of 1 mm(2...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Chaves Cde A, Regis RR, Machado AL, Souza RF Tags: Braz Dent J Source Type: journals

Effect of repeated disinfections by microwave energy on the physical and mechanical properties of denture base acrylic resins.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The present study evaluated the effect of repeated simulated microwave disinfection on physical and mechanical properties of Clássico, Onda-Cryl and QC-20 denture base acrylic resins. Aluminum patterns were included in metallic or plastic flasks with dental stone following the traditional packing method. The powder/liquid mixing ratio was established according to the manufacturer's instructions. After water-bath polymerization at 74 degrees C for 9 h, boiling water for 20 min or microwave energy at 900 W for 10 min, the specimens were deflasked after flask cooling and finished. Each specimen was immersed in 150 mL...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Consani RL, Azevedo DD, Mesquita MF, Mendes WB, Saquy PC Tags: Braz Dent J Source Type: journals

Effect of casting atmosphere on the shear bond strength of a ceramic to Ni-Cr and Ni-Cr-Be alloys.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study evaluated the effect of 3 casting atmospheres on the metal-ceramic bond strength (MCBS) of 2 Ni-Cr alloys, with beryllium (Fit Cast V) and without beryllium (Fit Cast SB). Sixty acrylic resin patterns (8 mm long and 5 mm diameter) were obtained using a fluorocarbon resin matrix. Wax was used to refine the surface of acrylic resin patterns that were invested and cast in an induction casting machine under normal, vacuum, and argon atmospheres at a temperature of 1340 degrees C. The castings were divested manually and airborne-particle abraded with 100-microm aluminum-oxide. Ten castings were obtained for each grou...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Pagnano VO, Esquivel Mde C, Leal MB, Felipucci DN, Bezzon OL Tags: Braz Dent J Source Type: journals

Fracture strength of teeth restored with ceramic inlays and overlays.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study evaluated the fracture strength of teeth restored with bonded ceramic inlays and overlays compared to sound teeth. Thirty sound human maxillary premolars were assigned to 3 groups: 1- sound/unprepared (control); 2- inlays and 3- overlays. The inlay cavity design was Class II MOD preparation with an occlusal width of 1/2 of the intercuspal distance. The overlay cavity design was similar to that of the inlay group, except for buccal and palatal cusp coverage The inlay and overlay groups were restored with feldspathic porcelain bonded with adhesive cement. The specimens were subjected to a compressive load until fr...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Morimoto S, Vieira GF, Agra CM, Sesma N, Gil C Tags: Braz Dent J Source Type: journals

Clinical and histopathological analysis of intramucosal zirconia inserts used for improving maxillary denture retention.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, intramucosal zirconia inserts did not affect the health of oral mucosa and provide adequate retention and stability of the complete denture and comfort to the patients. PMID: 19738949 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Gonçalves F, Dias EP, Cestary TM, Taga R, Zanetti RV, Zanetti A, Granjeiro JM Tags: Braz Dent J Source Type: journals

The role of surface treatments on the bond between acrylic denture base and teeth.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, ridge lap surface grinding with an aluminum oxide abrasive stone provided the highest bond strength, though it differed significantly only when compared to diatorics. The other surface treatments provided similar bond between the acrylic denture base and teeth. PMID: 19738950 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Bragaglia LE, Prates LH, Calvo MC Tags: Braz Dent J Source Type: journals

Bone damage induced by different cutting instruments--an in vitro study.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to compare the peripheral bone damage induced by different cutting systems. Four devices were tested: Er:YAG laser (2.94 mm), Piezosurgery, high-speed drill and low-speed drill. Forty-five bone sections, divided into 9 groups according to different parameters, were taken from pig mandibles within 1 h post mortem. Specimens were fixed in 10% buffered formalin, decalcified and cut in thin sections. Four different parameters were analyzed: cut precision, depth of incision, peripheral carbonization and presence of bone fragments. For statistical analysis, the Kruskal-Wallis test was applied to ass...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Romeo U, Del Vecchio A, Palaia G, Tenore G, Visca P, Maggiore C Tags: Braz Dent J Source Type: journals

Measuring parental-caregiver perceptions of child oral health-related quality of life: psychometric properties of the Brazilian version of the P-CPQ.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The Parental-Caregiver Perceptions Questionnaire (P-CPQ) is an instrument that assesses a parent's or a caregiver's perceptions regarding the impact of children's oral health status on quality of life. The aim of this study was to evaluate the psychometric properties of the Brazilian version of the P-CPQ. Following translation and cross-cultural adaptation, the P-CPQ was tested on 123 parents and caregivers of children between 11 and 14 years of age with dental caries and malocclusions. The parents/caregivers were recruited at dental clinics of the Federal University of Minas Gerais, where their children were receiving...
Source: Braz Dent J - September 11, 2009 Category: Dentistry Authors: Goursand D, Paiva SM, Zarzar PM, Pordeus IA, Grochowski R, Allison PJ Tags: Braz Dent J Source Type: journals

Dentin permeability: the basis for understanding pulp reactions and adhesive technology.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Permeability involves the passage of fluids, ions, molecules, particulate matter and bacteria into and through a substance or tissue under different and varying conditions. The permeability of the dentin is essential to support the physiology and reaction patterns of the pulp-dentin organ. Nutrients and impulses are transported from the pulp via the odontoblast process and the contents of its tubules maintain the dentin as a vital tissue. However, the main interest of this paper focuses on penetration from the outside towards the pulp rather than from the pulp towards the outside. The present overview centers on the de...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Mjör IA Tags: Braz Dent J Source Type: journals

Biocompatibility of acetazolamide pastes in the subcutaneous tissue of rats.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, in the present study, the experimental AZ-based paste 1 was considered as biocompatible as the control matrial (GP), while experimental paste 2 was irritating to rat subcutaneous tissue. PMID: 19466225 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Mori GG, Moraes IG, Nunes DC, Castilho LR, Poi WR Tags: Braz Dent J Source Type: journals

L929 cell response to root perforation repair cements: an in vitro cytotoxicity assay.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study compared the cytotoxicity of an experimental epoxy-resin and calcium hydroxide-based cement (MBPc), gray mineral trioxide aggregate (MTA) and white mineral trioxide aggregate (WMTA) using the agar overlay method with neutral red dye. L929 cells were seeded into 6-well culture plates where 48-h set test materials were placed on the agar overlay, in triplicate. Teflon and natural rubber served as negative and positive controls. After an incubation period of 24 h at 37 degrees C in a humidified atmosphere of 5% CO2 in air, a discolored area around the samples and the positive controls could be observed and measured...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Miranda RB, Fidel SR, Boller MA Tags: Braz Dent J Source Type: journals

Shelf-life of a 2.5% sodium hypochlorite solution as determined by arrhenius equation.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Accelerated stability tests are indicated to assess, within a short time, the degree of chemical degradation that may affect an active substance, either alone or in a formula, under normal storage conditions. This method is based on increased stress conditions to accelerate the rate of chemical degradation. Based on the equation of the straight line obtained as a function of the reaction order (at 50 and 70 degrees C) and using Arrhenius equation, the speed of the reaction was calculated for the temperature of 20 degrees C (normal storage conditions). This model of accelerated stability test makes it possible to predic...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Nicoletti MA, Siqueira EL, Bombana AC, Oliveira GG Tags: Braz Dent J Source Type: journals

Antimicrobial activity of calcium hydroxide pastes on Enterococcus faecalis cultivated in root canal systems.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The effectiveness of calcium hydroxide pastes: Calen and PMCC-Calen associated to chemo-mechanical preparation was assessed on Enterococcus faecalis grown within root canals. Seventy incisors were inserted into TSB medium, sterilized and contaminated with E. faecalis. Culture medium was replaced each 24 h and incubated at 37 degrees C for 72 h. After chemo-mechanical preparation, root canals were filled with Calen or PMCC-Calen (7 or 14 days). Pastes were removed and teeth were inserted into test tubes containing Enterococcosel broth. Calen paste (maintained for 7 and 14 days) induced 70% elimination of enterococci and...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Lana PE, Scelza MF, Silva LE, Mattos-Guaraldi AL, Hirata Júnior R Tags: Braz Dent J Source Type: journals

Effect of APF gel application time on enamel demineralization and fluoride uptake in situ.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This in situ crossover and blind study was conducted to investigate the effect of professional acidulated phosphate fluoride (APF) gel application time on the subsequent inhibition of enamel demineralization. During 3 phases of 28 days each, 15 volunteers wore palatal appliances containing 4 enamel blocks, which were subjected to 3 treatment groups: not treated (control) and pre-treated with APF gel for 1 or 4 min. Dental plaque was allowed to accumulate on the blocks and the appliances were immersed in 10% sucrose solution 3 times a day simulating a cariogenic challenge. After each phase, the blocks were removed to ev...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Villena RS, Tenuta LM, Cury JA Tags: Braz Dent J Source Type: journals

Impact of refrigeration on the surface hardness of hybrid and microfilled composite resins.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This in vitro study evaluated the Knoop hardness of the composite resins Charisma (C) and Durafill VS (D) polymerized in 3 different conditions: at room temperature (A) (23 +/- 1 degrees C); refrigerated at 4 +/- 1 degrees C and immediately photo-activated after removal from the refrigerator (0); and, refrigerated at 4 +/- 1 degrees C and photo-activated after a bench time of 15 min at room temperature (15). One hundred and twenty specimens (4 mm diameter and 2 mm depth) were made using a stainless steel mold and following manufacturer's instructions. All specimens were tested immediately after polymerization (I) and a...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Osternack FH, Caldas DB, Rached RN, Vieira S, Platt JA, Almeida JB Tags: Braz Dent J Source Type: journals

Effect of 10% carbamide peroxide bleaching on sound and artificial enamel carious lesions.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, bleaching procedures on enamel with CL did not exacerbate the demineralization, but should be indicated with caution. PMID: 19466231 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Pinto CF, Paes Leme AF, Cavalli V, Giannini M Tags: Braz Dent J Source Type: journals

Compressive strength of esthetic restorative materials polymerized with quartz-tungsten-halogen light and blue LED.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the compressive strength of the tested materials photoactivated with a QTH and a LED light source was influenced by the energy density employed and the chemical composition of the esthetic restorative materials. PMID: 19466232 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Silva CM, Dias KR Tags: Braz Dent J Source Type: journals

Root surface defect produced by hand instruments and ultrasonic scaler with different power settings: an in vitro study.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to evaluate the root surface defect produced by hand curettes and ultrasonic tips with different power settings. Forty root surfaces were divided into 4 groups according the treatment: Gracey curettes, ultrasonic scaler at 10% power, ultrasonic scaler at 50% power and ultrasonic scaler at 100% power. Each specimen was instrumented with 15 strokes and the and divided in the middle to evaluate: (1) the defect depth produced by the instrumentation and (2) contact area of the instrument tips, which was analyzed by scanning electron microscopy. ANOVA and Tukey's test were used for statistical analy...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Casarin RC, Ribeiro FV, Sallum AW, Sallum EA, Nociti-Jr FH, Casati MZ Tags: Braz Dent J Source Type: journals

Immunohistochemical expression of E-cadherin and CD44v6 in squamous cell carcinomas of the lower lip and tongue.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, SCCs of the lower lip and tongue did not reveal significant differences in the expression of E-cadherin and CD44v6. The expression of these adhesion molecules revealed association only with tumor histological grading of malignancy. Therefore, these results suggest that E-cadherin and CD44v6 may not help elucidating the differences between the biological behavior of SCCs of the lower lip and tongue. PMID: 19466234 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Cruz MC, Pereira AL, Lopes FF, Nonaka CF, Silva RR, Freitas Rde A, Souza LB, Pinto LP Tags: Braz Dent J Source Type: journals

Oral health knowledge and habits in children with type 1 diabetes mellitus.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, although the diabetic children seemed to have better oral health habits than the control children, there is a need for more information regarding oral hygiene and healthy habits. PMID: 19466235 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Alves C, Brandão M, Andion J, Menezes R Tags: Braz Dent J Source Type: journals

Dental needs in Brazilian patients subjected to head and neck radiotherapy.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In spite of its recognized benefits in the treatment of malignant tumors, radiation therapy have several side effects in the head and neck region. The evaluation of oral conditions by a dentist is important to prevent or minimize these problems. The aim of this retrospective review was to analyze the dental needs in 357 patients who received radiotherapy in the head and neck region and were treated at Orocentro/FOP/UNICAMP, between January 1990 and December 2004. Review of patient files showed that dental examination before radiotherapy was not performed in 148 patients (41.5%) and was done in 209 patients (58.5%). Fro...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Rosales AC, Esteves SC, Jorge J, Almeida OP, Lopes MA Tags: Braz Dent J Source Type: journals

Comparative study of intermaxillary relationships of manual and swallowing methods.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, the swallowing method produced smaller mandibular posterior displacement than the other methods. PMID: 19466237 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Alvarez MC, Turbino ML, Barros C, Pagnano VO, Bezzon OL Tags: Braz Dent J Source Type: journals

Bilateral mandibular canines with two roots and two separate canals: case report.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The mandibular canine is usually considered a single-rooted tooth with a single root canal. However, two canals and more rarely two roots may also occur. This paper reports the case of a patient with bilateral mandibular canines with two roots and two root canals. The initial periapical radiographs of the mandibular right and left canines for endodontic treatment revealed the presence of two roots in each tooth. After coronal opening, the cervical third was prepared with a SX file of the ProTaper system and root canal length was confirmed using Root ZX electronic apex locator. Root canal preparation was completed with ...
Source: Braz Dent J - June 27, 2009 Category: Dentistry Authors: Victorino FR, Bernardes RA, Baldi JV, Moraes IG, Bernardinelli N, Garcia RB, Bramante CM Tags: Braz Dent J Source Type: journals

Inflammation markers in healthy and periodontitis patients: a preliminary data screening.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, some of the selected markers of inflammation are differentially expressed in healthy and periodontitis patients. Cytokine profile analysis may be further explored to distinguish the periodontitis patients from the ones free of disease and also to be used as a measure of risk. The present data, however, are limited and larger sample size studies are required to validate the findings of the specific biomarkers. PMID: 19031648 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - November 29, 2008 Category: Dentistry Authors: de Queiroz AC, Taba M, O'Connell PA, da Nóbrega PB, Costa PP, Kawata VK, Trevisan GL, Novaes AB, de Souza SL, Palioto DB, Grisi MF Tags: Braz Dent J Source Type: journals

Immunohistochemical evaluation of the inflammatory response in periodontal disease.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In order to contribute to the knowledge of the pathogenesis of periodontal disease, an immunohistochemical analysis of the density of inflammatory mononucleated cells and the number of dendritic cells was performed using anti-CD4, anti-CD20, anti-CD25, anti-CD68 and anti-protein S-100 antibodies in 17 cases of chronic gingivitis (CG) and 25 of chronic periodontitis (CP). The CD4+ and CD68+ cells exhibited a diffuse distribution in the connective tissue. CD20+ cell distribution was predominantly in groups and the CD25+ cells exhibited a diffuse or focal distribution. The S-100+ cells were identified in the epithelium an...
Source: Braz Dent J - November 29, 2008 Category: Dentistry Authors: Lins RD, Figueiredo CR, Queiroz LM, da Silveira EJ, Freitas Rde A Tags: Braz Dent J Source Type: journals

Role of apoptosis in erosive and reticular oral lichen planus exhibiting variable epithelial thickness.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of this study was to evaluate the occurrence of apoptosis and epithelial thickness in reticular and erosive forms of OLP. 15 samples of OLP each type (reticular and erosive) plus 10 of healthy mucosa were collected and processed. After morphometry, the apoptotic index and epitelial thickness were obtained. TUNEL and M30 CytoDEATH immunohistochemical assay were used to validate the morphologic criteria used. Apoptosis in the erosive OLP was significantly more intense than in the reticular type and both forms of OLP presented more apoptosis than the healthy oral mucosa. Healthy oral mucosa was thicker than both...
Source: Braz Dent J - October 26, 2008 Category: Dentistry Authors: Brant JM, Vasconcelos AC, Rodrigues LV Tags: Braz Dent J Source Type: journals

Comparative analysis of the mast cell density in normal oral mucosa, actinic cheilitis and lip squamous cell carcinoma.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Previous studies have shown that the number of mast cells is increased in ultraviolet (UV) irradiated skin and in neoplasias. Actinic cheilitis (AC) is a lesion caused by excessive exposure to sunlight that can transform into lip squamous cell carcinoma. The aim of this study was to compare the number of mast cells in 4 groups: NOM = normal oral mucosa (n=6); MDAC = mild dysplasia in actinic cheilitis (n=13); SDAC = severe dysplasia in actinic cheilitis (n=13); and LSCC = lip squamous cell carcinoma (n=15). The sections were stained by histochemical technique of blue toluidine and visual counting was performed with the...
Source: Braz Dent J - October 26, 2008 Category: Dentistry Authors: Gomes AP, Johann JE, Lovato GG, Ferreira AM Tags: Braz Dent J Source Type: journals

Effects of nystatin, fluconazole and propolis on poly(methyl methacrylate) resin surface.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, PRO was able to induce changes in PMMA surface properties, such as roughness, which could be related to microbial adhesion. PMID: 18949289 [PubMed - in process] (Source: Braz Dent J)
Source: Braz Dent J - October 26, 2008 Category: Dentistry Authors: Silva WJ, Rached RN, Rosalen PL, Del Bel Cury AA Tags: Braz Dent J Source Type: journals