Autotransplantation of Impacted Third Molar Using 3D Printing Technology: A Case Report.
Abstract Here, we describe a case of autotransplantation of a mandibular horizontally impacted third molar using a 3-dimensional (3D) model based on limited cone-beam computed tomography (CBCT) images for diagnosis, 3D morphological evaluation, preoperative treatment planning, and surgical simulation. A 27-year-old woman visited this hospital for conservative treatment of the mandibular left second molar. Intraoral radiography and CBCT images revealed a C-shaped root canal in the mesial root, and compressive resorption of the distal root due to impingement of the crown of the horizontally impacted lower left third...
Source: The Bulletin of Tokyo Dental College - August 15, 2019 Category: Dentistry Authors: Kamio T, Kato H Tags: Bull Tokyo Dent Coll Source Type: research

Change in Anterior Crowding over 20 Years from Third Decade of Life in Untreated Angle Class I Crowding.
Abstract Many studies have investigated age-related change in normal occlusion and during the post-retention phase of orthodontic treatment. None, however, have investigated such change in malocclusion. The purpose of this study was to compare age-related change in Angle Class I crowding with that in normal occlusion. Dental casts obtained from 10 men and 2 women in their 20s and then again in their 40s were digitized with a 3-dimensional laser scanner to measure anterior crowding, angulation, inclination, andarch width and length. A paired t -test was used to evaluate change in these values betweenthe two sets of...
Source: The Bulletin of Tokyo Dental College - July 31, 2019 Category: Dentistry Authors: Saito Y, Tanoi A, Motegi E, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Factors Associated with Untreated Decayed Teeth in Male Sales Workers: An Internet Survey.
Abstract The purpose of this study was to identify factors associated with untreated decayed teeth (DT) in male sales workers. The participants were recruited by screening a pool of Japanese registrants in an online database for eligibility for inclusion in the study. Between 20 February 2015 and 11 March 2015, those deemed eligible were asked to complete a questionnaire on the status of their oral health. Responses from a total of 142 male sales workers aged between 30 and 49 years were analyzed. Of these, 40 reported DT and 102 no untreated decayed teeth (NDT). The percentage of participants with DT was higher t...
Source: The Bulletin of Tokyo Dental College - July 16, 2019 Category: Dentistry Authors: Ishizuka Y, Yoshino K, Suzuki S, Sato R, Onose Y, Eguchi T, Takayanagi A, Kamijo H, Sugihara N Tags: Bull Tokyo Dent Coll Source Type: research

Periodontal Regenerative Therapy Using Enamel Matrix Derivative in Patient with Chronic Periodontitis: a 3-year 6-month Follow-up Report.
Abstract Here, we report a case of chronic periodontitis requiring periodontal regenerative therapy. The patient was a 73-year-old man who visited Tokyo Dental College Suidobashi Hospital with the chief complaint of gingival swelling and mobile tooth in the mandibular incisor region. An initial examination revealed that 33% of sites had a probing depth (PD) of≥4 mm and 27% bleeding on probing. Radiographic examination revealed bone resorption extending as far as the root apex in #32 and 47, vertical bone resorption in #37, and horizontal resorption in other regions. Based on a clinical diagnosis of moderate chr...
Source: The Bulletin of Tokyo Dental College - July 16, 2019 Category: Dentistry Authors: Aoki H, Seshima F, Saito A Tags: Bull Tokyo Dent Coll Source Type: research

Treatment of Child with Four Lost Maxillary Incisors due to Traffic Injury.
Abstract Tooth injury is frequently encountered in pediatric clinical practice. A clinician may be requested to not only respond at the time of injury, but also properly diagnose how such injury will affect the teeth and dentition. Here, we present a case of a child who lost 4 bilateral maxillary incisors due to a traffic accident, and in whom marked mesial inclination of the bilateral maxillary canines and bilateral maxillary first premolars would subsequently occur. Dental management was provided over an extended period. The boy, aged 9 years 11 months, visited our department with the chief complaint of prematur...
Source: The Bulletin of Tokyo Dental College - July 16, 2019 Category: Dentistry Authors: Homma H, Okada M, Nakauchi A, Osawa E, Nagai N, Sakurai A, Shintani S Tags: Bull Tokyo Dent Coll Source Type: research

Morphological Investigation of Residual Ridge in Japanese Edentulous Elderly for Fabrication of Edentulous Stock Tray.
The objective of this study was to determine the size of the residual ridge in edentulous elderly Japanese persons for preparation of edentulous stock trays and clarify any correlations among the items measured. The participants comprised 74 patients requesting construction of a complete denture for the maxilla, mandible, or both. The length, width, and anterior and posterior height of the maxillary and mandibular residual ridge was measured on a prepared working model using a caliper. For each of the maxillary and mandibular edentulous residual ridges, correlations among measurement items were analyzed employing Pearson's...
Source: The Bulletin of Tokyo Dental College - July 16, 2019 Category: Dentistry Authors: Ryu M, Nakamura M, Izumisawa T, Ishizaki K, Ueda T, Sakurai K Tags: Bull Tokyo Dent Coll Source Type: research

Reducing Dental Plaque Scores in Long-term Care Facilities Using a Checklist and Random Inspections: A Pilot Study.
This study investigated whether an intervention comprising the daily use of a checklist for oral care by nursing staff supplemented by random inspections by a charge nurse resulted in lower dental plaque scores in patient participants at a long-term care facility (n=19) as compared with in those at another long-term care facility that did not receive the intervention (n=13). All participants received a dental cleaning at baseline. At a follow-up examination at 6 to 8 weeks post-baseline, significant differences were observed in the plaque scores between the participants at each location, with the median plaque scores in th...
Source: The Bulletin of Tokyo Dental College - June 20, 2019 Category: Dentistry Authors: Laurence B, Rogers I, Grant-Mills D, Smith D, Tefera E, Barbarinde A, Champagne D, Thomas M Tags: Bull Tokyo Dent Coll Source Type: research

Effect of Different Bracket Prescriptions on Orthodontic Treatment Outcomes Measured by Three-dimensional Scanning.
Abstract Various types of bracket are currently available, and different prescriptions are provided for the same type of tooth. There are no definite criteria, however, on which to base bracket selection. The purpose of this study was to investigate differences in the angulation and inclination of orthodontically aligned teeth when using different prescription brackets. Thirty patients undergoing orthodontic treatment for maxillary protrusion and crowding were enrolled. After orthodontic treatment with a pre-adjusted appliance, angulation and inclination were measured on dental casts obtained from these patients (...
Source: The Bulletin of Tokyo Dental College - April 10, 2019 Category: Dentistry Authors: Soboku T, Motegi E, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Relationship between Blood HbA1c Level and Decayed Teeth in Patients with Type 2 Diabetes: A Cross-sectional Study.
Abstract The purpose of this cross-sectional study was to determine whether there is an association between hemoglobin A1c (HbA1c) level and the presence or absence of decayed teeth in patients with type 2 diabetes mellitus. The patients and data on their age and sex, the presence or absence of dental claims, medical history of diabetes mellitus, and workplace dental examinations were obtained from a Japanese healthcare database available for epidemiological studies. The HbA1c levels were obtained from results of the Specific Health Checkups and Specific Health Guidance tests conducted by the Japanese Ministry of ...
Source: The Bulletin of Tokyo Dental College - April 10, 2019 Category: Dentistry Authors: Suzuki S, Yoshino K, Takayanagi A, Ishizuka Y, Satou R, Nara N, Kamijo H, Sugihara N Tags: Bull Tokyo Dent Coll Source Type: research

Esthetic Improvement through Orthodontic Treatment Involving Extraction: Use of Orthodontic Anchor Screws.
Abstract Here, we report two cases of dental bimaxillary protrusion in which orthodontic anchor screws were used to improve the esthetics of the mouth and lips and facilitate complete closure of the mouth. Case 1 was a woman with dental maxillary protrusion and constriction of the dental arches, with the main complaint of protrusion of the lips and mandibular crowding. The maxillary and mandibular dental arches were first widened and traction applied to the maxilla via orthodontic anchor screws. The maxillary incisors were retracted 10 mm and the mandibular incisors 3 mm, resulting in upper lip retraction of 3 mm ...
Source: The Bulletin of Tokyo Dental College - April 10, 2019 Category: Dentistry Authors: Katada H Tags: Bull Tokyo Dent Coll Source Type: research

Role of Dental Implant Superstructure in Patients with Severe Periodontal Disease.
Abstract Many studies have investigated the relationship between periodontal disease and the onset of peri-implantitis. It is important to devise practical measures for preventing the development of peri-implantitis in patients with periodontal disease if the success of implant treatment is to be secured. Here, we report the role of the superstructure in two cases of implant treatment in patients with severe periodontal disease. Both patients had severe periodontitis and underwent implant treatment after improving the state of the disease, thereby ensuring that the implant superstructure could be maintained. Both ...
Source: The Bulletin of Tokyo Dental College - April 10, 2019 Category: Dentistry Authors: Ito T, Nishimura K, Ogasawara R, Furuya Y, Yajima Y Tags: Bull Tokyo Dent Coll Source Type: research

Surgical Orthodontic Treatment Involving Mandibular Premolar Extraction in Patient with Mandibular Retrusion Associated with Temporomandibular Joint Osteoarthritis.
Abstract Here, we report retention following surgical orthodontic treatment in a patient with vertical maxillary excess associated with temporomandibular joint osteoarthritis (TMJOA) and marked mandibular retrusion. The patient was a man aged 20 years 10 months who presented with the chief complaint of maxillary protrusion. The facial profile was of the convex type due to marked mandibular retrusion. In addition, the patient had a gummy smile. Intraoral findings revealed a Class II molar relation, +11 mm overjet, and 0 mm overbite. Mandibular dentition arch length discrepancy showed crowding of -2 mm, and the maxi...
Source: The Bulletin of Tokyo Dental College - April 10, 2019 Category: Dentistry Authors: Nojima K, Nagata M, Ootake T, Nishii Y, Yakushiji T, Narita M, Takano N, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Periodontal Regenerative Therapy Using Enamel Matrix Derivative for Treatment of Generalized Severe Chronic Periodontitis: A 2-year Case Report.
Abstract Here, we describe the treatment course and 2-year follow-up in a case of multiple deep intrabony defects treated with periodontal regenerative therapy. The patient was a 50-year-old woman presenting with the chief complaint of mobile teeth in the maxillary molar region. Examination at her initial visit revealed sites with a probing depth of ≥7 mm in the molar region. Radiographic examination revealed generalized bone resorption. Angular bony defects were evident in the molar region. Initial periodontal therapy was commenced based on a clinical diagnosis of generalized chronic periodontitis. At re-evalu...
Source: The Bulletin of Tokyo Dental College - March 15, 2019 Category: Dentistry Authors: Seshima F, Kigure T, Saito A Tags: Bull Tokyo Dent Coll Source Type: research

Intra- and Inter-Investigator Reliability of Measurement of Lip-Seal Strength in Adults.
Abstract The purpose of this methodological study was to clarify intra- and inter-investigator reliability of lip-seal strength measurement in adults. Lip-seal strength was measured with a digital medical strain gauge using the button-pull method. The coefficient of variation (CV) of intra-investigator reliability of measurement in 24 healthy adult volunteers (16 men, 8 women; mean age, 26±3 years) ranged from 0.088 to 0.103 (mean for 3 investigators, 0.098). The intraclass correlation coefficient (ICC [1,1]) of intra-investigator reliability of this method of lip-seal strength measurement ranged from 0.759...
Source: The Bulletin of Tokyo Dental College - March 15, 2019 Category: Dentistry Authors: Ueda T, Oki T, Ohta M, Ogami K, Sakurai K Tags: Bull Tokyo Dent Coll Source Type: research

Periodontal Regenerative Therapy with Enamel Matrix Derivative in Patient with Chronic Periodontitis: A 3.5-year Follow-up Report.
Abstract Here, we report periodontal treatment including regenerative therapy in a patient with generalized chronic periodontitis. The patient was a 53-year-old woman who presented with the chief complaint of gingival swelling and tooth mobility in the right maxillary molar region. An initial examination revealed 36% of sites with a probing depth of ≥4 mm and 15.5% with bleeding on probing. Radiographic examination revealed vertical bone resorption in #15, 24, 27, 34, 37, 45, and 47. Horizontal resorption was noted in other regions. The clinical diagnosis was moderate chronic periodontitis. Initial periodontal ...
Source: The Bulletin of Tokyo Dental College - March 15, 2019 Category: Dentistry Authors: Bizenjima T, Osuka Y, Tomita S, Saito A Tags: Bull Tokyo Dent Coll Source Type: research

Finite Element Analysis of Stress in Maxillary Dentition during En-masse Retraction with Implant Anchorage.
Abstract The goal of this study was to investigate how the height of the archwire hook and implant anchor affect tooth movement, stress in the teeth and alveolar bone, and the center of resistance during retraction of the entire maxillary dentition using a multibracket system. Computed tomography was used to scan a dried adult human skull with normal occlusion. Three-dimensional models of the maxillary bone, teeth, brackets, archwire, hook, and implant anchor were created and used for finite element analysis. The heights of the hook and the implant anchor were set at 0, 5, or 10 mm from the archwire. Orthodontic f...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Suzuki M, Sueishi K, Katada H, Togo S Tags: Bull Tokyo Dent Coll Source Type: research

Evaluation of Normal Epiglottis on Computed Tomography with Special Attention to Thickness.
Abstract To our knowledge, this is the first study to investigate the thickness of the normal epiglottis on computed tomography (CT) in a Japanese population. The focus was on determining the thickness of a normal epiglottis, which could then serve as a reference in detecting abnormalities. We believe that this would facilitate diagnosing and determining the extent of cancerous invasion of the supraglottis and secondary invasion of the epiglottis. This retrospective study was based on a review of radiographic data in patient charts. Cervical CT scans obtained from 79 Japanese patients (44 men [55.7%] and 35 women ...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Baba A, Okuyama Y, Yamauchi H, Ogino N, Dorgu M, Kobashi Y, Yamazoe S, Munetomo Y, Mogami T, Ojiri H Tags: Bull Tokyo Dent Coll Source Type: research

Evaluation of Liquid Based Cytology for Tongue Squamous Cell Carcinoma: Comparison with Conventional Cytology.
Abstract Oral exfoliative cytology is now used by general practitioners in Japan to screen for oral cancer. With conventional cytology, however, the number of cells that can be sampled is small. Moreover, cell deformation and piling of cells when preparing specimens has been reported. The purpose of this study was to compare conventional and liquid based cytology (LBC), which has been employed with increasing frequency in recent years. We believe that identifying potential pitfalls in oral exfoliative cytology will help improve diagnostic accuracy. A total of 153 patients with tongue squamous cell carcinoma who we...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Osaka R, Hayashi K, Onda T, Shibahara T, Matsuzaka K Tags: Bull Tokyo Dent Coll Source Type: research

Inhibitory Effects of Lingonberry Extract on Oral Streptococcal Biofilm Formation and Bioactivity.
Abstract Phenolic compounds in fruits such as cranberries have been shown to promote a number of biological activities. The purpose of this study was to investigate the effects of polyphenolic compound-containing lingonberry extract on oral streptococci and compare them with the known anti-cariogenic activity of cranberries. Water-soluble and polyphenol-rich fractions (Fractions I and II, respectively) were isolated from cranberries and lingonberries. The effects of those fractions on the biofilm formation ability and bioactivity of Streptococcus mutans MT8148R, Streptococcus sobrinus 6715, and Streptococcus sangu...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Kokubu E, Kinoshita E, Ishihara K Tags: Bull Tokyo Dent Coll Source Type: research

Parental Satisfaction with Ambulatory Anesthesia during Dental Treatment for Disabled Individuals and Their Preference for Same in Future.
Abstract The purpose of this study was to survey parental satisfaction with ambulatory anesthesia during dental treatment in disabled patients. Factors associated with parental preference for general anesthesia during future dental treatment in such patients were also investigated. A questionnaire was mailed to the parents of 181 disabled individuals who underwent dental treatment under ambulatory anesthesia at Tokyo Dental College Suidobashi Hospital between 2012 and 2016. A total of 71 responses were received (39.2%). The mean patient age was 18 years, and disabilities included autism spectrum disorder, intellec...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Ohtawa Y, Yoshida M, Fukuda K Tags: Bull Tokyo Dent Coll Source Type: research

Effect of Mongolian Herbal Tea on Growth of Candida albicans.
Abstract Candida albicans, one of the main pathogens in the oral cavity, is involved in the development of oral candidiasis. Various components of tea, and especially polyphenols, are believed to be effective against the growth of yeast or bacteria. The purpose of this study was to investigate the effect of polyphenols in Mongolian herbal tea on growth of C. albicans. Tea extract was prepared from Mongolian herbal tea and diluted with distilled water (DW) at concentrations of 10, 20, 30, 40, or 50%. Distilled water was used as the control. Acidification of the medium was determined by measuring its pH; the presenc...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Davaadorj M, Ser-Od T, Al-Wahabi A, Kokubu E, Inoue T Tags: Bull Tokyo Dent Coll Source Type: research

Effect of Differences in Axial Thickness and Type of Cement on Fracture Resistance in Composite Resin CAD/CAM Crowns.
Abstract The purpose of this study was to investigate the influence of differences in axial thickness and type of cement on fracture load in CAD/CAM crowns. Assuming the mandibular first premolar to be the abutment tooth, 4 types of crown with different axial thicknesses and radii of curvature were prepared. To unify external design, the morphology of the crown margins was set at 0.15, 0.30, 0.45, or 0.60 mm, thus maintaining uniform axial form of the crowns. The CAD/CAM crowns and abutment teeth were bonded using each of 2 types of resin cement or polycarboxylate cement. The fracture load value was measured using...
Source: The Bulletin of Tokyo Dental College - January 31, 2019 Category: Dentistry Authors: Masuda T, Nomoto S, Sato T, Kanda Y, Sakai T, Tsuyuki Y Tags: Bull Tokyo Dent Coll Source Type: research

Mandibular Reconstruction with Free Vascularized Fibular Graft.
Abstract An iliac block graft is the most commonly used biomaterial for reconstruction following resection of the mandible. Its use has some disadvantages, however, including limitations on the amount of bone that may be harvested, and the subsequent increase in burden on the iliac bone. Therefore, recently, free vascularized fibular grafts have been used as an alternative in some cases. Here, we report the advantages of, and issues related to reconstruction using free vascularized fibular grafts observed at Tokyo Dental College Chiba Hospital. Eight patients undergoing mandibular reconstruction using free vascula...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Yamamoto N, Morikawa T, Yakushiji T, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Factors Associated with Undergoing Regular Dental Check-ups in Healthy Elderly Individuals.
In conclusion, the results revealed that individuals undergoing regular dental check-ups had 20 or more residual teeth, cleaned their teeth/denture 3 or more times per day, and had a higher GOHAI score. This indicates that the best predictive factor for undergoing regular dental check-ups in healthy elderly individuals is their GOHAI score. PMID: 30333368 [PubMed - as supplied by publisher] (Source: The Bulletin of Tokyo Dental College)
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Eguchi T, Tada M, Shiratori T, Imai M, Onose Y, Suzuki S, Satou R, Ishizuka Y, Sugihara N Tags: Bull Tokyo Dent Coll Source Type: research

Influence of Smoking on Interleukin-34 Levels in Gingival Crevicular Fluid and Plasma in Periodontal Health and Disease: A Clinico-biochemical Study.
Abstract Interleukin-34 (IL-34), an alternative ligand for macrophage colony-stimulating factor receptor, plays an important role in osteoclastogenesis. The aim of this study was to analyze the effect of smoking on IL-34 levels in gingival crevicular fluid (GCF) and plasma in individuals with healthy periodontium and chronic generalized periodontitis (CP). A total of 60 individuals ranging in age from 25 to 55 years were enrolled in the study. The participants were divided into 4 groups: Group A, 30 samples (15 GCF and 15 plasma) obtained from 15 non-smokers with healthy periodontium; Group B, 30 samples (15 GCF a...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: N Guruprasad C, R Pradeep A Tags: Bull Tokyo Dent Coll Source Type: research

Treponema denticola Induces Epithelial Barrier Dysfunction in Polarized Epithelial Cells.
In this study, the MDCK cell profile was investigated following infection with T. denticola (ATCC 35405) wild-type, as well as with its dentilisin-deficient mutant, K1. Basolateral exposure of MDCK cell monolayers to T. denticola at a multiplicity of infection (MOI) of 104 resulted in a decrease in transepithelial electrical resistance (TER). Transepithelial electrical resistance in MDCK cell monolayers also decreased following apical exposure to T. denticola (MOI=104), although this took longer with basolateral exposure. The effect on the TER was time-dependent and required the presence of live bacteria. Meanwhile, MDCK c...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Kikuchi Y, Kimizuka R, Kato T, Okuda K, Kokubu E, Ishihara K Tags: Bull Tokyo Dent Coll Source Type: research

Comparative Study of Mandible Ramus Morphology Using 3-dimensional CT in Sagittal Split Ramus Osteotomy.
Abstract The purpose of the present study was to investigate the relevance of the external morphology of the mandibular ramus, internal bone tissue structure, and maxillofacial morphology at the site for sagittal split ramus osteotomy among different facial skeletal patterns. A total of 80 patients with jaw deformities who underwent sagittal split ramus osteotomy were included in the study. The patients were divided into two groups based on facial skeletal type (skeletal Class II or skeletal Class III). A further 7 patients with no skeletal abnormalities were established as the control group (skeletal Class I). Co...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Hirota M, Suga K, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Change in Autonomic Nervous Activity during Ingestion of Soft Food in Older Nursing Home Residents.
In conclusion, autonomic nervous activity increased during chewing soft foods compared to that during the resting level in older adults. PMID: 30333372 [PubMed - as supplied by publisher] (Source: The Bulletin of Tokyo Dental College)
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Ohta M, Ueda T, Sakurai K Tags: Bull Tokyo Dent Coll Source Type: research

Difference in Bilateral Timing of Eruption of Permanent Teeth.
Abstract The aim of this study was to obtain basic data that might serve as criteria in the diagnosis of delayed eruption of the permanent teeth. The synchronicity of the eruption of corresponding contralateral teeth was determined. Data were obtained on both the deciduous and permanent dentition based on records made every 2 months at the Department of Pediatric Dentistry of Tokyo Dental College. These data were then used to investigate bilateral differences in the timing of eruption of the permanent teeth. Over 80% of incisors, first molars, mandibular canines, and maxillary first premolars erupted within 4 mont...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Makino E, Tsujino K, Ishii T, Shintani S, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Implant Treatment after Sagittal Splitting Ramus Osteotomy and Alveolar Ridge Augmentation in Patient with Mandibular Prognathism and Multiple Missing Maxillary Teeth.
Abstract An abnormal maxillomandibular ridge relationship frequently hinders oral implant treatment in patients with jaw deformities. Here, we describe a patient who was experiencing difficulty using dentures due to multiple maxillary tooth loss and mandibular prognathism. Treatment comprising sagittal splitting ramus osteotomy and alveolar ridge augmentation using bone grafts harvested from the mandibular ramus followed by implant treatment yielded good outcomes. The patient was a 47-year-old woman presenting with an unstable upper partial denture. Although prior prosthetic treatment for mandibular prognathism ha...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Furuya Y, Yamamoto M, Ito T, Takaki T, Shibahara T, Yajima Y Tags: Bull Tokyo Dent Coll Source Type: research

Squamous Cell Carcinoma of Maxillary Gingiva Progressing to Disseminated Carcinomatosis of Bone Marrow.
Abstract Disseminated carcinomatosis of the bone marrow (DCBM) is characterized by diffuse metastasis to bone marrow and sudden mortality. To the best of our knowledge, no studies to date have reported progression of oral squamous cell carcinoma to DCBM. Herein, we report a case of squamous cell carcinoma in the maxillary gingiva suspected of progressing to DCBM. A 64-year-old woman presented with white lesions on the left maxillary gingiva. The lesions were diagnosed as squamous cell carcinoma (T2, N0, M0), and partial maxillectomy performed. Two years and 5 months after surgery, metastasis was noted in the left ...
Source: The Bulletin of Tokyo Dental College - October 18, 2018 Category: Dentistry Authors: Sato K, Suzuki T, Sanjo Y, Ushioda T, Hashimoto K, Saito H, Ogane S, Takano N, Nomura T Tags: Bull Tokyo Dent Coll Source Type: research

Three-dimensional Analysis and Evaluation in Orthognathic Surgical Cases with Facial Asymmetry.
Abstract Two-dimensional cephalometric analysis is commonly used in planning and evaluating the outcome of orthognathic surgery. It is difficult to arrive at an accurate evaluation with this method, however, as the jaw bones overlap in profile. Therefore, the purpose of this study was to use 3-dimensional (3-D) orthognathic treatment planning software for measurement of distances and angles to evaluate change in dentofacial morphology and stability after orthognathic surgery in patients with jaw deformity and facial asymmetry. Computed tomography with SimPlant O&O® (Materialize Dental, Belgium) was used to...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Kogou T, Takaki T, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Evaluation of Factors Associated with Tongue Coating Status in Elderly with Care Needs.
Abstract The tongue surface in older people requiring nursing care is often coated with a layer believed to comprise, keratinized products of degeneration, food residue, bacteria, and leukocytes attached to the tongue papillae. Which factors affect the status of this tongue coating remain to be elucidated, however. The purpose of this study was to evaluate factors related to tongue coating status in older people requiring nursing care. The study participants comprised 41 individuals admitted to special nursing homes for the elderly. After undergoing tooth brushing and tongue cleaning by the facility staff, the par...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Ogami K, Ueda T, Ryu M, Tajima S, Sakurai K Tags: Bull Tokyo Dent Coll Source Type: research

Development of Jaw and Deciduous Teeth in Japanese Children -Comparing Size of Crown and Alveolar Area between Today and 40 Years Ago.
Abstract The purpose of the present study was to investigate change in the size of the jaw and deciduous teeth in Japanese children over the past 40 years by performing measurements on plaster models of the dental arch obtained from children born between 2007 and 2009 (2000s group) and children born between 1968 and 1974 (70s) group. A total of 61 children were enrolled in the 2000s group, comprising 25 boys (average age, 4 years 5 months) and 36 girls (average age, 4 years 4 months), and 93 children in the 70s group, comprising 45 boys (4 years 6 months) and 48 girls (4 years 4 months). The mesiodistal width of t...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Makiguchi T, Imai H, Arakawa A, Tashiro A, Yonezu T, Shintani S Tags: Bull Tokyo Dent Coll Source Type: research

Growth of Palate in Unilateral Cleft Lip and Palate Patients Undergoing Two-stage Palatoplasty and Orthodontic Treatment.
Abstract The purpose of this study was to investigate the long-term effects of two-stage palatoplasty on the morphology of the maxillary alveolar arch and occlusion using plaster models of the maxilla and mandible obtained from patients with unilateral complete cleft lip and palate who also underwent orthodontic treatment. A total of 20 patients undergoing two-stage palatoplasty by Perko's method (Group T) were enrolled. Plaster models of the maxilla and mandible were obtained from each patient at Time 1, on commencement of orthodontic treatment in the mixed dentition period; at Time 2, on that of orthodontic trea...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Eriguchi M, Watanabe A, Suga K, Nakano Y, Sakamoto T, Sueishi K, Uchiyama T Tags: Bull Tokyo Dent Coll Source Type: research

Verruciform Xanthoma with Equivocal Exfoliative Cytological Diagnosis.
Abstract Verruciform xanthoma (VX), a papillary or wart-like lesion of the mucosa, is histopathologically characterized by papillary projection of the epithelium and an aggregation of foam cells in the lamina propria. Here, we describe a case of VX in the posterior mandibular gingiva, initially suspected to be a benign lesion based on clinical findings and cytology prior to an excisional biopsy. The patient was a 62-year-old man who had visited a local dentist approximately 1 year earlier, presenting with a white lesion in the left posterior mandibular gingiva that resisted removal by scraping. The lesion was left...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Onda T, Hayashi K, Shiraishi N, Takano N, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Implant-supported Prostheses in Patient with Sj ögren's Syndrome: Clinical Report with 3-year Follow-up.
This report describes dental implant treatment in an SS patient, a 50-year-old woman who presented with the chief complaint of masticatory dysfunction and pain due to a removable partial denture. Eight implants were placed in the maxillary and mandibular first molar tooth and second molar tooth regions. Following a 4-month non-loading period, second-stage surgery and provisional restoration with a screwretained implant temporary crown were performed. Screw-retained superstructures were fitted by means of a customized titanium abutment and zirconia crown as the final restoration. No complications, including inflammation of ...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Mori G, Kobayashi T, Ito T, Yajima Y Tags: Bull Tokyo Dent Coll Source Type: research

Atypical MRI and Histopathological Findings in Dermoid Cyst.
This report describes a dermoid cyst in the floor of the mouth of a 55 year-old woman that showed an atypical internal appearance on MRI. Most of the lesion showed homogeneous high signal intensity on T1 - and T2-weighted images, suggesting that it was derived from fat. A small area within the mass, however, showed moderate signal intensity almost equal to that of muscle on T1-weighted images and high signal intensity on fat-suppressed T2-weighted images. Given the location of the lesion, a dermoid cyst was one possible diagnosis. A lipoma or lipoma variants were also considered, however, based on signal intensity. Histopa...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Otonari-Yamamoto M, Nakajima K, Sakamoto J, Imoto K, Watanabe M, Kotaki S, Kuroda M, Matsuzaka K, Shibahara T, D Curtin H, K Goto T Tags: Bull Tokyo Dent Coll Source Type: research

Two-year Survey of Trends at Food Introduction Booth at Suidobashi Hospital of Tokyo Dental College.
Abstract A working group established at Tokyo Dental College Suidobashi Hospital considered how to manage patients experiencing difficulties with food intake during the process of dental treatment. This resulted in the opening of an in-hospital booth dedicated to providing advice on such problems. A survey was performed to determine the number of patients utilizing this facility and the department which they were attending with the aim of investigating factors involved in eating-related problems. The results revealed that patients were being referred to the booth from the departments of dental prosthetics, conserv...
Source: The Bulletin of Tokyo Dental College - September 19, 2018 Category: Dentistry Authors: Ohkubo M, Ueda T, Sugito H, Watanabe A, Seshima F, Morioka T, Yajima Y Tags: Bull Tokyo Dent Coll Source Type: research

Treatment of Gingival Fenestration with Connective Tissue Graft: A Case Report.
Abstract Here, we report a case of gingival fenestration requiring periodontal plastic surgery. The patient was a 32-year-old man presenting with the chief complaint of esthetic impairment and gingival twitching due to gingival fenestration. Baseline examination revealed localized periodontal breakdown, including gingival fenestration in the lower right central incisor (#41). Periodontal examination revealed 3% of sites with a probing depth of ≥4 mm and 8.9% with bleeding on probing. Radiographic examination revealed vertical bone loss in #15 and 36, together with buccal fenestration in #41. Based on a clinical...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Kita D, Kinumatsu T, Ishii Y, Yamanouchi K, Saito A Tags: Bull Tokyo Dent Coll Source Type: research

Sclerosing Polycystic Adenosis of Tongue.
nn J Abstract Sclerosing polycystic adenosis (SPA) is a rare benign lesion of the salivary glands which appears histologically similar to sclerosing adenosis and fibrocystic disease of the mammary gland. To date, 67 cases of SPA have been reported in the literature, with the lesion arising in the minor salivary glands in only 9. The present report describes the 10th case of SPA. The patient was a 39-year-old Brazilian man who presented with an asymptomatic nodule on the ventral surface of the tongue. Based on a clinical diagnosis of benign salivary gland neoplasm, an excisional biopsy of the lesion was performed. ...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Henrique Braz-Silva P, Motta do Canto A, Oliveira L, Martins F, Antônio Pereira da Costa A, Adolfo Costa Hanemann J Tags: Bull Tokyo Dent Coll Source Type: research

Congenital Epulis: A Case and Review of the Literature.
We describe a case of congenital epulis (20×10 mm) in the mandibular gingiva of a newborn. The mass, which was smooth-surfaced and pedunculated with a healthy color, was surgically removed at 5 months post-birth. Histologically, the tumor consisted mainly of large eosinophilic granular cells. Immunohistochemical studies revealed intense staining for vimentin, STRO-1, and CD44, suggesting that it was derived from mesenchymal cells. The literature and immunohistochemical profile of congenital epulis are also discussed. PMID: 29962420 [PubMed - in process] (Source: The Bulletin of Tokyo Dental College)
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Kokubun K, Matsuzaka K, Akashi Y, Sumi M, Nakajima K, Murakami S, Narita M, Shibahara T, Inoue T Tags: Bull Tokyo Dent Coll Source Type: research

Dental Treatment Effect on Deep Brain Stimulation System in Parkinson's Disease.
Abstract Parkinson's disease (PD) is a highly prevalent, long-term neurodegenerative disorder that is sometimes treated by deep brain stimulation (DBS), which significantly reduces the need for dopaminergic drug therapy and improves quality of life. Such patients are cautioned, however, that dental instruments such as a dental turbine or ultrasonic scaler may adversely affect the functioning of such a system. Here, we report dental treatment for right maxillary tooth pain in a 65-year-old woman undergoing DBS for PD. The diagnosis was occlusal trauma. After verification with occluding paper each time, treatment co...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Kojima Y, Kojima M, Nohara K, Sakaguchi Y Tags: Bull Tokyo Dent Coll Source Type: research

Effects of Ultrasonic Debridement on Oral Hygiene Status.
Abstract The aim of this randomized-controlled, single-blinded study was to compare the effects of mechanical tooth cleaning (MTC) and ultrasonic debridement (UD) on oral hygiene status in healthy young adults. Thirty-seven participants (mean age: 20.3±0.62 years) were divided into 3 groups after pre-examination: group A, receiving MTC; B, receiving MTC+UD using a universal insert (UDUI); and C, receiving MTC+UD using a probe-shaped insert (UDPI). All participants were required to abstain from oral hygiene for 24 hours after the allocated intervention, after which they were examined. A masked examiner deter...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Takenouchi A, Arai H, Otani E, Fushimi A, Matsukubo T Tags: Bull Tokyo Dent Coll Source Type: research

Three-dimensional Finite Element Analysis of Bone Fixation in Bilateral Sagittal Split Ramus Osteotomy Using Individual Models.
Abstract The purpose of this study was to investigate factors involved in stress on locking mini-plate/screws used in orthognathic surgery based on patient-specific 3-dimensional finite element analysis. Data were obtained from 10 patients undergoing mandibular advancement by bilateral sagittal split ramus osteotomy. All underwent osteosynthesis with 2.0-mm titanium locking mini-plate/screws. A 3-dimensional finite element model of the mandible was created for each patient and each model subjected to the same loading conditions, which produced different stress values on locking mini-plate/screws. When the contact ...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Tamura N, Takaki T, Takano N, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Interleukin-34 Levels in Gingival Crevicular Fluid and Plasma in Healthy and Diseased Periodontal Tissue in Presence or Absence of Obesity: A Clinico-biochemical Study.
Abstract Interleukin (IL)-34 has recently been identified as an alternative ligand for colonystimulating factor-1 receptor and plays an important role in osteoclastogenesis. The aim of this study was to assess and compare IL-34 levels in gingival crevicular fluid (GCF) and plasma in obese individuals in the presence or absence of periodontal disease and to determine whether they showed a correlation with disease severity. Forty patients aged between 25 and 40 yr were enrolled and categorized into 4 groups: 10 non-obese patients with healthy periodontium (Group I); 10 obese patients with healthy periodontium (Group...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Guruprasad CN, Pradeep AR Tags: Bull Tokyo Dent Coll Source Type: research

Effect of Mesenchymal Cells on Myoblast Sheets Embedded in Collagen Gel.
The objective of this study was to investigate the effects of mesenchymal cells on myoblasts in long-term cultivation of myoblast cell sheets. Sheets of myoblasts and mesenchymal cells from Japanese rabbit oral mucosa were generated and analyzed by histochemistry, Western blot, and reverse transcription-polymerase chain reaction. The presence of desmin and type IV collagen, which is seen in normal muscle tissue, was also confirmed in all the sheets produced. Expression of desmin and type IV collagen showed a decrease under co-culture conditions. In addition, expression of genes important in maintaining the undifferentiated...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: Yoshimoto T, Serikawa M, Higa K, Kitamura K, Kasahara M, Yamamoto M, Abe S Tags: Bull Tokyo Dent Coll Source Type: research

Effect of PRF and Allograft Use on Immediate Implants at Extraction Sockets with Periapical Infection -Clinical and Cone Beam CT Findings.
Abstract Immediate implant placement can be successful, even at infected sites. The adjunctive effects of concomitant use of platelet-rich fibrin (PRF) and decalcified freeze-dried bone allografts (DFDBA) at periapically infected sites remains to be determined, however. The purpose of this prospective study was to investigate the effect of combined use of PRF and DFDBA on immediate implant survival at tooth extraction sites exhibiting periapical lesions. Implants were immediately placed in 8 patients under a standard chemotherapeutic protocol. Adin titanium implants were used in all cases. The combination of PRF a...
Source: The Bulletin of Tokyo Dental College - July 4, 2018 Category: Dentistry Authors: S Medikeri R, Meharwade V, M Wate P, V Lele S Tags: Bull Tokyo Dent Coll Source Type: research

Condition-specific Quality of Life Assessment at Each Stage of Class III Surgical Orthodontic Treatment -A Prospective Study.
Abstract Surgical orthodontic treatment has been reported to improve oral health-related quality of life (OHRQL). Such treatment comprises three stages: pre-surgical orthodontic treatment; orthognathic surgery; and post-surgical orthodontic treatment. Most studies have focused on change in OHRQL between before and after surgery. However, it is also necessary to evaluate OHRQL at the pre-surgical orthodontic treatment stage, as it may be negatively affected by dental decompensation compared with at pre-treatment. The purpose of this prospective study was to investigate the influence of surgical orthodontic treatmen...
Source: The Bulletin of Tokyo Dental College - March 28, 2018 Category: Dentistry Authors: Tachiki C, Nishii Y, Takaki T, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Nitric Oxide Synthase (NOS) Isoform Expression after Peripheral Nerve Transection in Mice.
Abstract Localization of the nitric oxide (NO)-producing enzyme, nitric oxide synthase (NOS), and its functions are currently being investigated in several tissues and organs. It has been suggested that NO is involved in nerve cell death and the development of neurodegenerative disease. The purpose of this study was to immunohistochemically investigate expression of NOS to clarify its function in the degeneration and regeneration of transected mouse sciatic nerve. Scattered neuronal NOS (nNOS)-positive Schwann cells observed on the central side of the stump on day 1 after transection showed an increase in number o...
Source: The Bulletin of Tokyo Dental College - March 28, 2018 Category: Dentistry Authors: Kikuchi R, Ambe K, Kon H, Takada S, Watanabe H Tags: Bull Tokyo Dent Coll Source Type: research