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Treatment of dentoskeletal bimaxillary protrusion: additional extraction of maxillary second molarsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract This case report describes the orthodontic treatment of an 18-year-old female patient with Class II malocclusion with dentoskeletal bimaxillary protrusion. An acceptable treatment result was obtained with a four first premolar extraction and an additional maxillary two second molar extraction plan. Standard edgewise appliances were placed after the premolars were extracted. A positive soft tissue response to treatment was achieved, and the patient’s profile was improved, with a reduction of lip protrusion and mentalis strain. Dentally, the interincisal angle improved significantly as both the maxi...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Relative efficiency of radiation sources for photopolymerizationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The aim of this study was to evaluate the characteristics of new-generation light-emitting diode (LED) units in comparison with the conventional tungsten-halogen, plasma arc, and first-generation LED units reported in our previous study. The irradiance of light from new-generation LED units, the temperature rise of the bovine enamel surface, and the depth of cure of composites exposed to each unit were investigated. The irradiances in the range 400–515 nm emitted from the new-generation LED units were greater than those from the first-generation LED units. The temperature increase was 15–25°C f...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Root and canal morphology of mandibular first and second permanent molar teeth in a Ugandan populationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract We investigated root and canal morphology of permanent mandibular molar teeth in a Ugandan population. Mandibular first (n = 224) and second (n = 223) molars were collected from patients visiting dental clinics in Kampala and prepared by a clearing technique. An endodontic access cavity was prepared in each tooth. The teeth were consecutively immersed in 5% sodium hypochlorite, 10% nitric acid, and 99% methyl salicylate. India ink was coronally injected into the pulp chamber and withdrawn apically by suction. The teeth were viewed under a magnifying lens and the numbers of root canals and their confi...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

The effect of angiotensin II on the proliferation of human gingival fibroblastsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Angiotensin not only raises blood pressure and modifies body fluids and electrolytes but also induces differentiation and proliferation of fibroblasts in the circulatory system in order to repair damage. The purpose of the present study was to observe the influence of the addition of angiotensin II (AngII) or nifedipine (NIF) alone or both sequentially on proliferative activity, the intracellular Ca2+ concentration ([Ca2+]i), and the inositol-1,4,5-triphosphate (IP3) level in cultivated human gingival fibroblasts. Addition of 10−8−10−4 M NIF or 10−5−10−4 M AngII alone increased the prolif...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Diagnosis and treatment of xerostomia (dry mouth)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Xerostomia (dry mouth) is a common complaint with widespread implications such as impaired quality of life, oral pain, and numerous oral complications. There are a variety of salivary and nonsalivary causes of xerostomia, the most frequent being medication side effects and systemic disorders. A systematic approach should be employed to determine the etiology of this condition, with distinctions made between patients with subjective complaints of xerostomia alone and those with measurable salivary gland dysfunction. Management is multidisciplinary and multimodal. This review summarizes the current li...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Evaluation of two dual-functional primers and a tribochemical surface modification system applied to the bonding of an indirect composite resin to metalsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract We evaluated the effects of two dual-functional primers and a tribochemical surface modification system on the bond strength between an indirect composite resin and gold alloy or titanium. Disk specimens (diameter, 10 mm; thickness, 2.5 mm) were cast from type 4 gold alloy and commercially pure titanium. The specimens were wetground to a final surface finish using 600-grit silicone carbide paper. The specimens were then air-dried and treated using the following four bonding systems: (1) air-abrasion with 50–70 μm alumina, (2) system 1 + alloy primer, (3) system 1 + metal link primer, and (4) trib...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Periodontal disease and risk of atherosclerotic coronary heart diseaseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Atherosclerosis is an important component of coronary heart disease (CHD), which is the leading cause of death worldwide, including in Japan. Because atherosclerotic processes are typified by chronic inflammatory responses, which are similar to those elicited by chronic infection, the role of infection in promoting or accelerating atherosclerosis has received considerable focus. Increasing evidence supports the notion that periodontitis is associated with increased risk of atherosclerosis through dysfunction of endothelial cells induced by either periodontopathic bacteria or their products, or infla...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Bone regeneration during distraction osteogenesisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Bone has the capacity to regenerate in response to injury. During distraction osteogenesis, the renewal of bone is enhanced by gradual stretching of the soft connective tissues in the gap area between two separated bone segments. This procedure has received much clinical attention as a way to correct congenital growth retardation of bone tissue or to generate bone to fill skeletal defects. The process of bone regeneration involves a complex system of biological changes whereby mechanical stress is converted into a cascade of signals that activate cellular behavior resulting in (enhanced) formation o...
Source: Odontology - July 28, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Histopathologic changes in the pulpal and periapical tissues after surgical removal of the coronal pulp chamber of rat lower molarEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract With the specific aim of the examination of tissue-damage and repair of surgically exposed pulp and periapical region in rat molar model, 14 female Sprague-Dawley rats were used. The coronal portion of lower first molars was surgically removed and the teeth remained untreated for 3 weeks prior to euthanasia of the animals. During this experimental period, all animals were injected with fluorochrome agents twice at the 12th and 19th days, in order to monitor formation of hard tissues in the exposed pulpal chamber and on the surfaces of cementum and alveolar bone. For histologic examination using micr...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Studies on penetration of peroral new quinolone, levofloxacin to rabbit oral soft tissues with influence of stomachics sankyo magen mittelEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract It is a well-known fact that theoretically the absorption of new quinolones in the intestinal tract is significantly inhibited as a result of their interaction with metal cations. In order to study the effects of S. M powder, which is frequently used in the department of dentistry, on the tissue transfer of new quinolones, we administered S. M powder in combination with levofloxacin (LVFX) to rabbits and made comparative studies of soft tissue transfer rates. Prior to the initiation of the present study, we confirmed that there is a significant difference in tissue transfer rates of ofloxacin (OFLX)...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A comparative morphological study on the tongue and the lingual papillae of some marine mammals —Particularly of four species of odontoceti and zalophus—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract We observed the structure of the tongues of some aquatic mammals in four species of Odontoceti (Stenella coeruleoalba, Lagenorhynchus obliquidens, Tursiops truncatus andMesoplodon stejnegeri) andZalophus californianus californianus using light microscopy (LM) as well as scanning electron microscopy (SEM) and compared the characteristics of the tongue of each animal species. In the four species of Odontoceti, the dorsal surface of the anterior part of the tongues had a smooth surface. However, after removal of the epithelium, slender conical connective tissue cores (CTCs) were densely distributed. At ...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A study on kinetic frictional properties in Begg/KB orthodontic appliances at posterior sitesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract In Begg and KB techniques, the kinetic frictional force generated between their characteristic orthodontic appliances at posterior sites and the orthodontic wire affects the efficiency of tooth movement. We compared the kinetic frictional force between the recent orthodontic appliances for posterior sites: the by-pass loop-KB buccal tube system (loop-KB tube system) and the conventional by-pass clamp-round buccal tube system (clamp-round tube system), and elucidated the frictional properties of the loop-KB tube system. We used 016"/018" round wires (016/018 round) and 022" × 016" ribbon wire (022 r...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

The rate of appearance intraoral pain and discomfort caused byCandidaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Patients sometimes complain of pains and/or discomfort in the tongue or oral mucosa, even though they are diagnosed to have no abnormalities at dental and prosthetic examinations and maintain good health. It is extremely difficult to identify the exact cause of pain in these patients, who have only the complaint of subjective symptoms, without any symptoms such as rubber or swelling. Such pains and discomfort might beCandida. However, reports of the rate of appearance were rare. In the present study, we examined patients with primary complaints of intraoral pain and discomfort thought to be caused...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

An anatomical study of the adult human face: Distribution of elastic fibers and collagen fibers in the skin and subcutaneus tissueEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study was carried out at the histochemical, immunohistochemical and scanning electron microscopic levels to elucidate morphology, distribution of elastic fibers and extracellular matrices (type I and III collagens). Specimens were collected from 26 cadavers (18 males and 8 females; 50–90 years of age) which had no muscular disease in the human face. 1. Observation by macroscopy: A tight attachment between skin and connective tissue was found in the frontal and inferior labial regions, but at the superior labial, orbital and modiolus regions showed loose attachment in the face skin. 2. Ob...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Modes of occlusion in humans: A comparison of traditional aborigines and modern JapaneseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract A study of the modes of occlusion of permanent teeth among Australian Aborigines was conducted at the University of Adelaide Faculty of Dentistry. From 1951 to 1971, 1,708 intra-oral plaster molds were taken at longitudinal changes from 444 Aborigines leading a traditional lifestyle in Northern Australia. Comparisons and analyses then were made with molds of modern Japanese. 1) In contrast to previous reports, occlusion among Aborigines was found to be characterized by a mixture of psalidodontia (approximately 55%), deep overbite (approximately 30%), and labidodontia, and in general this ...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A cohort study on prevalence of dental caries concerning primary schoolchildren in one village of Niigata PrefectureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract To review the previous preventive measures against the incidence of dental caries in children, we started to examine the state of dental health in children at the age of 18 months. The annual dental examination continued up to 12 years of age (sixgraders). Enrolled in this study were a total of 225 children living in a Town T and born between 1980 and 1982. Meanwhile, we made surveys in order to gauge the degree to which the subjects and their parents have concern for oral health. The findings and their relationships to the caries incidence were analyzed using an epidemiological technique. The ann...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Pantographic reproducibility of mandibular border movements in patients with craniomandibular disordersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The change of the reproducibility of maximum border movements in patients with CMD has been studied in the United States. Clayton and others reported a change of PRI, pantographic reproducibility index. There is no information on this in the Japanese population. Also, there is found no study on each section of a scribed line, pantographic reproducibility value (PRV). The purpose of this study is to analyze each section’s characteristics with a Japanese population. 30 craniomandibular disorder patients were used in study. The Denar pneumatic pantograph has used. The average PRI before treatment was...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Longitudinal changes in the permanent dentition of traditional aborigines: Movements of the first molar and the anterior dentitionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Changes in the permanent dentition that occur with growth in traditional Australian Aborigines have been reported by J. M. Barrett et al. (1965) and T. Brown et al. (1983–92). We undertook research on the longitudinal changes in the size of the permanent dentition of Aborigines by using a different method from that of the aforementioned studies. By focusing on the first molars, we analyzed movements in the anterior permanent dentition. We collected intra-oral plaster models of 50 male Aborigines and 50 female Aborigines, and measured the lengths and widths of the upper and lower dental arch tri...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Bonding effect of adhesive resin cement to ZrO2−Al2O3 composite ceramics (3Y20A)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract ZrO2−Al2O3 Composite Ceramics (3Y20A) has been discussed as a reinforcing material for castable glass ceramics. It is a goal of this study to obtain stable adhesive strength of 3Y20A using adhesive resin cement. As for the experimental conditions, four types of adhesive resins and three surface treatment methods were selected, and the effect of their bonding strength was compared. As a result, the surface roughness of 3Y20A was increased and its bonding strengh was improved with a 46% hydrofluoric acid treatment and 5-atm alumina sandblasting. In addition, the use of a silane coupling agent has ...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Clinical evaluation of analgesics against pulsating pain in dental diseasesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract To investigate the effect of analgesics on pulsating pains, we studied the effect of pyrazolone and salicylate analgesics on the onset time and duration of analgesia, the course of analgesics response, and the recurrence of pain. The overall effective rate was 90.2%, 97.4% for the pyrazolone analgesics tested and 83.3% for the salicylate analgesics. In the pyrazolone group, the onset time and duration of analgesia were shorter than in the salicylate group. The time course of analgesics response was as follows: Fifteen minutes after ingestion of the pyrazolone analgesics, “severe” pain was reduce...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Bactericidal effect of newly developed electrically oxidized water against several genera of bacteriaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The purpose of this study is to investigate the bactericidal effects of newly developed electrically oxidized water (EOW) against several genera of bacteria and fungi. This EOW contained hypochlorous acid with chloride ion cuncentrations at 31.1±0.77 ppm in pH 5.20±0.09. Each genus of bacteria (initial concentration of 108 cells/ml) was incubated with EOW for 30sec., one minute, two minutes and five minutes at room temperature. Then the survival rate was determined by colony formation. For the genusStreptococci, E. coli, A. viscosus, F. nucleatum, P. gingivalis andA. actinomycetemcomitans, survived...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Pharmacokinetic-pharmacodynamic modeling of pentazocine under general anesthesia —Effect of infusion period on respiratory rate—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The respiratory rates following intravenous administration of pentazocine during general anesthesia were measured, in order to determine the effect of pentzocine on respiration from immediately after administration. When respiratory rates were compared among infusion periods of pentazocine (1 mg/kg) for 1, 3 and 6 minutes, it was found that the faster the infusion rate, the shorter the duration to reach the maximum reduction of respiratory rate, showing a significant difference (p<0.05). However, the maximum reduction of respiratory rate did not significantly differ among different infusion pe...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Differential responsiveness against mechanical stress between osteoblastic cells and periodontal ligament cellsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Using the human osteosarcoma-derived osteoblastic cell line, HOS cells, and the human periodontal ligament-derived fibroblast-like cells (Periodontal ligament cells; PDL cells), we examined the responsiveness against mechanical stress (continuously applied compressive force) in HOS and PDL cellsin vitro. SDS-PAGE revealed that loading of mechanical stress (10 g/cm2) promoted intracellular protein production (approx. 30–35 kDa, 40kDa, 55kDa, 65–70kDa) in HOS cells, which are different sizes from those in PDL cells reported previously. Mechanical stress also enhanced heat shock protein (HSP) produc...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Statistics for the analysis of tenderness score summation in patient with craniomandibular disordersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Digital palpation has been used to evaluate patients with craniomandibular disorders. Tendemess at each site is classified on a 0 to 3 scale and evaluated as total summation. Tendernes were ranked on the scale. Nonparametric statistics were applied to analyze these data. 34 kind 64 sites makes 192 steps in total summation. Increase of step yielded similer results in parametric and nonparametric statistics. The purpose of this study is to clarify the difference in results between nonparametric and parametric statistics. 100 female CMD patient data were used to make group of 13, 25, 50 and 100 subject...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Establishment and characterization of cultured human gingival keratinocytes immortalized by Transfection of origin (−) SV40 DNA and c-fos geneEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract In order to establish human oral epithelial cell lines, secondary cultures of human oral keratinocytes from normal gingival tissues obtained from 20–29-yr-old females were transfected with origin (−) SV40 DNA (pRNS-1) and human c-fos gene (pBK 28) using Transfectam reagent® (Promega, WI). Out of 20 cultures transfected with pRNS-1, only one culture escaped senescence. After the transfection with origin(−) SV40 (87 days in culture), human c-fos (pBK 28) was introduced into ori− cells. Ori− cells and ori− cells transfected with c-fos, designated NDUSD-1 cells, were subjected to G418 selecti...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A study on the influence of preoperative radiotherapy to proliferating cell nuclear antigen (PCNA) for oral cancer cellsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract In order to evalute the effects of preoperative irradiation therapy on oral cancer, monoclonal antibody to proliferating cell nuclear antigen (PCNA) was used to calculate PCNA positive rates before and after 30Gy irradiation therapy. The subjects were 24 patientas with oral cancer. Based on the results, the relation between PCNA positive rate and the histolosical effects of irradiation therapy was quantitatively analyzed. The conclusions are summarized as follows. 1) The average pretreatment PCNA positive rate was 33.4±11.4% while the average posttreatment rate was 24.0±7.9%. 2)&nb...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Gold-silver-palladium alloys for laser irradiation —Effects of gold addition—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The clasp arms are fatigued by wearing a denture, by taking it off, and by occlusion. We routinely use laser irradiation to harden only the surface layer of clasp arms consisting of gold-silver-palladium alloy partially hardened by laser irradiation to resist fatigue. Recently we tested laser irradiation on silver-palladium-copper alloys, and obtained the following results: 1) The surface hardness of the mother alloy No. 12 (52.5Ag−12.5Pd−35.0Cu alloy (wt%)) was 299.7HV after laser irradiation, 155% harder than after casting. 2) The surface hardness of the 18Au−40Ag−...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Distribution of type II collagen in human mandibular condyle during development —Color image analyzer with computer system—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The formation of the cartilage in mandible of human fetuses, which ranged from 12 to 32 weeks gestation, was systematically investigated with immunohistochemystry linked to an image color analyzer. One of the extracellular matrix proteins (type II collagen) was found mainly in the hypertrophic layer of the condyle from 16 weeks gestation. The percentage of type II collagen per 10,000μm2 area using a computer system with an image color analyzer gradually increased from 16 weeks gestation. This analyzer system revealed the value of cell activity by using immunoperoxidase staining. These results sugge...
Source: Odontology - May 6, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Fluoride release from fluoride-releasing orthodontic materials and the effect of saliva on etched enamel Part 1. Evaluations of fluoride release in de-ionized water and factors influencing the fluoride rechargeable abilityEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of the present study was to determine the F release from two fluoride-releasing orthodontic materials in de-ionized water, and to evaluate the effects of the products, the F concentration of NaF solutions (0.02, 2%) and the immersion time (3, 6min) on the F rechargeable ability, during a two week trial. The results indicated that both the F releasing and the F rechargeable abilities were significantly different between products, and the effect of NaF immersion on the rechargeable ability was greater for the F concentration of NaF solution than for the effect of immersion time. Content Type Journal A...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

The effects of mutastein and dextranase on the synthesis of insoluble glucans byStreptococcus mutans B13Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The investigation of the effects of mutastein and dextranase on the crude GTF derived fromS. mutans B13, and liveS. mutans B13, were made, and the following results were ohtained. 1) The amount of insoluble glucans formed on the surface of the wall of a test tube in the presence of mutastein or dextranase decreased with the increase in the concentration of mutastein or dextranase. The amount of synthesized water-soluble glucans and insoluble non-adherent glucans increased with the increase in the concentration of mutastein or dextranase up to a certain point. 2) The formatio...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Histocytological study of the guided bone regeneration using the rat mandibleEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We examined the rat-mandibles which had been operated by the GBR technique and obtained following results: 1. Bone regeneration at both experimental sides promoted due to the obstruction of invasion of muscle tissue around the defect area. 2. The regeneration of small vessels was observed in the defective area on the both experimental sides, especially at the GTAM side. 3. Loose connective tissue was found for long periods on the both experimental sides. 4. Regenerated bone began at the bony edge of the defect area, and irregular sponge-like new bone was detected on the...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Terminal care for oral cancer patients in hospital dentistry and oral and maxillofacial surgery at a local areaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract A sequential study concerning suicide of patients with oral cancer, notification of oral cancer, terminal care of patients with oral cancer at home, etc. has been performed in our department. As part of the study, a possible role of hospital dentistry and oral and maxillofacial surgery at a local area was examined recently with reference to the terminal alleviating care provided to three patients with oral cancer at Joetsu General Hospital. The result was as follows: It is natural that most patients want to die at home in the presence of their family. In order to fulfill such a desire, it is cons...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A case of Papillon-Lefèvre syndrome —Longitudinal observation for 20 years—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract We have followed a case of Papillon-Lefèvre syndrome over 20 years since the patient was brought to our hospital at the age of four. During this period, we inserted two sets of primary dentition dentures each into the upper and lower jaws, and later five sets of permanent dentition dentures in the both jaws corresponding the changes in the oral condition tootn erupution, exfoliation and the number of remaining teeth. From the longitudinal odservation, we have arrived at the conclusions as follows: 1. The replacement of missing parts in the dental arch with plate dentures culd achieve res...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Surgical treatment of mandibular condylar fracture by direct approach to reach the facial nerveEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Surgical treatment of 10 condyles of 8 patients with mandibular condylar fracture by direct approach to reach the facial nerve was retrospectively discussed. In three lower condylar fractures, open reduction and fixation by means of a mini-plate system were perfomed under direct vision and resulted in successful clinical outcomes. In 7 upper condylar fractures, condylar segments were removed because they were not able to reduce and fix. Postoperatively, temporal facial paralysis of tomporal or zygomatic branches occured at five operated sites and completely recovered two to four months. We...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Anthropological studies of human skeletal remains from Cook Islands, Polynesia —Prehistoric skulls from Pukapuka atoll—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study describes several features revealed from analyses on the skulls of 6 males. 1) The craniometrical comparison of the skulls with the heads of modern Pukapukan males revealed a feature, that the prehistoric specimens were mesocranic, whereas the modern people showed brachycephalic. 2) The craniometrical comparison with prehistoric specimens from other islands in Oceania populations demonstrated that the prehistoric Pukapukan exhibited typical features of prehistoric Polynesians, that they are larger than the specimen from other regions in sagittal frontal arc, sagittal chord, bimaxill...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Dynamic studies of luting cement layer on full cast crownEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study was undertaken to elucidate the dynamic behavior of the cement layers of the full cast crowns under the following conditions: 1) four marginal designs 2) two material properties of the cement. Stress distribution and the three values at the margin of the cement layer were analyzed using the three-dimensional finite element model. The results can be summarized as follows: 1) When the model crown was vertically loaded, compression tended to decrease on the crown and there was no high stress concentration at any site. 2) When the crown model was obliquely loaded, compression tended t...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Fluoride release from fluoride-releasing orthodontic materials and the effect of saliva on etched enamel Part 2. Effect of fluoride release on etched enamel in artificial salivaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, a 2% NaF solution and a 6min immersion period for the rechargeable treatment were applied, and then F and Ca concentrations in the artificial saliva with etched or non-etcnhed bovine enamel were determined. Moreover, each enamel specimen was analyzed by EPMA. The results obtained are as follows: (1) F release in artificial saliva was significantly different between the products, but little F rechargeable abilities was observed. (2) A significant negative correlation was observed between F and Ca concentrations for the first two weeks. (3) EPMA analysis showed that the F uptake was increased with F relea...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Histological changes in the mouse submandibular gland subjected to parasympathetic nerve block or ischemia: Comparison between chorda tympani resection and trophic vessel transectionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The purpose of this study was to determine the effect of disorders of parasympathetic innervation or trophic vessels on the parenchymal tissue of the submandibular gland. ICR mice underwent resection of the chorda tympani nerve or transection of the trophic vessels. After treatment, the submandibular glands were removed at intervals and processed for examination using light and electron microscopy. 1. From 1 week after nerve resection, the submandibular gland parenchymal tissue showed expanded blood vessels, infiltration of wandering cells and growth of connective tissue fibers, etc. Deg...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Clinical study of patients whose dental implants were removedEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Twenty-nine cases including 13 males and 16 females, aged 24 to 71 years (average age of 53.7±11.6), whose dental implants were removed at our deparments for past thirteen years from 1985 to 1998 have been retrospectively discussed. Implants were placed in 26 partial edentulous and 3 totally edentulous, 14 for maxilla, 13 for mandible, 2 for both jaws were removed. These implants included 14 blade, 6 endosseous, 14 subperiosteal, 3 endodontic, and 2 home-made implants. Durations from implant placement to removal were 10 days to 20 years (average of 78.3±83.7 months). Causes of removal were 12 loca...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A study of the surface-roughness and fit of crowns made with gypsum-bonded investment mixed with smectite solutionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Gypsum-boned investment was mixed with various concentrations of water-solube smectite with marked thixotropy, and the effects of smectite on the surface-roughness and fit of crowns were studied. In the experiment, two kinds of commencial gypsum-bonded investment were mixed with four different concentrations of smectite solutions at the standard water mixing ratio Specular resin patterns and model crown wax patterns were used, and the moulds were heated at four different temperatures. Results: As the concentration of smectite increased, the fit of the cast crowns increased for cristobalite investm...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Influence of thickness on color stability of body and incisal porcelainsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Knowledge of the relationship between thickness and shade of body porcelain and incisal porcelain is essential for producing esthetic porcelain restoration. We thus performed an experimental study to clarify the effect of thickness on shade of body porcelain and incisal porcelain. The main results were: 1) In a two-layered restorstion of opaque porcelain and body porcelain, the values of L*, a* and b* decreased with increasing thickness of body porcelain. The effect of the thickness of body porcelain on shade was strongest in A1 and weakest in C4. 2) The effect of the thickn...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Stress analysis of tooth and supporting tissue using the finite element method —Effect of properties of periodontal membrane—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract We investigated changes in natural teeth under loading and the correspondence of simulated models to these results using the finite element method. Four kinds of models were analyzed according to loading conditions at the periodontal membrane. Two models for linear analysis and two models for nonlinear analysis were established. The influences of these 4 models on stress distribution were compared. The following results were obtained. 1) The differences Young’s modulus at the Periodontal membranes greatly affected the structure analysis; 2) a loading-deviation curve approximating actual values was...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A study on the fit of the base plate —Influence of canditions of storage—Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The aims of this study was to define the effect of storage conditions of base plates, which consist of self-curing resin. Examinantions were made on the dimensional accuracy with the passage of time of base plate stored in water and air on a plaster model for standerdized maxillary edentulous. The following conclusions were obtained; 1. The fit of base plate stored in water proved to be beter than that stored in air. 2. No significant difference was noted among 7 times points. 3. In terms of sites of measurement along the base plate, the more posteror the site of ...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Immersion test of the Ag−Pd−Cu alloy systemEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Silver-palladium alloys are widely used as substitutes for gold alloys. Pure silver, three Ag−Cu eutectics, three Ag−Pd solid solutions and nine Ag−Pd−Cu ternary alloys were prepared. The specimens were immersed in three kinds of solutions, Ringer’s, 0.1% sodium sulfide, and 1% lactic acid solutions. The change of the reflectance and the color was examined using CIE, Yxy notation. The reflectance of polished specimens was maximum in the pure silver specimen. It decreased with the decrease of silver content, or with the increase of palladium content. In Ringer’s solution, only A...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Classification of angioarchitectural structures of the rabbit tongue foliate papillae in scanning electron microscopic specimensEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Although may ultrastructural morphological studies have been undertaken on the lingual papillae of the rabbit tongue, relatively few have dealt with the microvascular structure and classification of the foliate papillae (FoP) in microvascular cast specimens (MVCS) by means of scanning electron microscopy (SEM). For the present study, a three-dimensional observation and classification was carried out by SEM. The morphological characteristics of the outer frame structure composed of the ascending and descending capillary branches, were observed by means of MVCS of FoPs which were located on both poste...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Restorative methods for the Er: YAG laser applicationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The purpose of this study was to determine if a cavity prepared using the Er: YAG laser could be restored with restorative materials other than composite resin. A class V cavity for the composite resin and a class I cavity for the amalgam, gold foil, and inlay, were prepared in the human premolars an using the Er: YAG. laser. The cavities were restored with these restorative materials. The boundaries between the teeth and the restorative materials were observed using a DIGITAL MICRO SCOPE-6300. The following results were odtained; 1. Because all the margins of the cavities were rough, it...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

A study on tooth mobility following periodontal surgeryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract The purpose of this study was to evaluate the quantitative changes in tooth mobility before and after periodontal surgery using a tooth mobility tester. The tester was so designed as to be able to measure the cycle of sympathetic vibrations produced when a tooth was tapped with a impact hammer. Initially the degrees of tooth mobility, which were clinically classified from 0 to 3, were observed and the mode of mobility was assessed by the tester. Then, we examined the changes of tooth mobility after flap surgery. The following is a summary of findings. 1) The coefficient of change in meas...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Clinical evaluation of urinary 6-hydroxymethylpterin (6-HMP) in patients with cancer of the digestive organsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions were as follows: 1. Cut off level of urinary 6-HMP was defined as 0.079 μg/ml, from 87 normal subjects. 2. The daily profile of urinary 6-HMP in normal subjects was highest in morning and lowest at bedtime and daily changes were continuously under the cut off level. 3. Sensitivity, specificity and accuracy of urinary 6-HMP were 64.2%, 77.6% and 70.5% respectively. 4. In patients with malignant diseases, the overall positive rate was 64.2% and was clearly higher than benign diseases. 5. The positive rate of urinary 6-HMP levels in malignant disea...
Source: Odontology - April 30, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Molecular mechanisms of taste transduction in vertebratesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Content Type Journal ArticleCategory ErratumDOI 10.1007/s10266-009-0098-3Authors Yoshiro Ishimaru, The University of Tokyo Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences 1-1-1 Yayoi, Bunkyo-ku Tokyo 113-8657 Japan Journal OdontologyOnline ISSN 1618-1255Print ISSN 1618-1247
Source: Odontology - February 25, 2009 Category: Dentistry Tags: Odontology Source Type: journals

Molecular mechanisms of taste transduction in vertebratesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Abstract Among the five senses, taste and olfaction play crucial roles in the detection of chemical substances in the environment and are referred to as chemical senses. In the past decade, much progress has been made in studies on molecular mechanisms of the gustatory system by methods such as those based on molecular and cellular biology, genetics, and bioinformatics. This review covers recent studies on taste receptors, intracellular signaling transduction in taste receptor cells, and taste coding at the periphery in vertebrates from fish to mammals. Content Type Journal ArticleCategory Review ArticleD...
Source: Odontology - January 29, 2009 Category: Dentistry Tags: Odontology Source Type: journals