Survey on Condition and Orthodontic Treatment of Maxillary Lateral Incisors in Patients with Cleft Lip and Palate.
Abstract The aim of this study was to investigate the condition of the maxillary lateral incisors and evaluate the methods used for cleft closure in patients with cleft lip and palate, including the treatment of the maxillary lateral incisors. A total of 214 patients (260 clefts) with alveolar clefts who had started Phase II treatment and entered the maintenance period at the Department of Orthodontics at Tokyo Dental College, Chiba Hospital, between 1975 and 2014 were included. Panoramic, intraoral, and occlusal radiographs, as well as intraoral photographs and medical records, were used to investigate cleft clas...
Source: The Bulletin of Tokyo Dental College - June 10, 2020 Category: Dentistry Authors: Uchino M, Arima H, Kobayashi H, Nagata J, Yasumura T, Ishii T, Miyazaki H, Sakamoto T, Nojima K, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Comparison of Characteristics of Dental Malpractice Trials between Medical Malpractice and Ordinary Divisions in District Courts.
Abstract The purpose of this study was to elucidate the characteristics of dental malpractice trials undertaken by medical malpractice divisions and ordinary divisions in district courts. Dentistry disputes in a total of 84 trials held between 1977 and 2014 were investigated. A total of 45 were conducted by medical malpractice divisions, resulting in 18 approvals and 27 dismissals, while 39 were undertaken by ordinary divisions, leading to 24 approvals and 15 dismissals. The parameters analyzed comprised category of dental treatment, judgment, amount claimed, and amount accepted. The results revealed that the mean...
Source: The Bulletin of Tokyo Dental College - June 10, 2020 Category: Dentistry Authors: Kasahara N, Matsunaga S, Yamada M, Nakamura Y, Tashiro M, Hashimoto M Tags: Bull Tokyo Dent Coll Source Type: research

Three-Dimensional Evaluation of Change in Maxillary Alveolar Arch after Expansion in Unilateral Cleft Lip and Palate Patients.
In this study, the stability of expansion of the maxillary arch was investigated by examining 3-dimensional change in the maxillary arch during the treatment and post-retention periods. Three-dimensional measurements was performed on maxillary plaster models obtained from 8 unilateral cleft lip and palate patients (mean age, 12.5 years) who had undergone maxillary arch expansion using an edgewise appliance and quad helix (CLP group). The controls consisted of 8 unilateral cleft lip and alveolus patients (mean age, 12.9 years). Measurements were made during the pretreatment, post-treatment, and post-retention periods. In th...
Source: The Bulletin of Tokyo Dental College - June 10, 2020 Category: Dentistry Authors: Takahashi I, Sakamoto T, Ishii T, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Population Genetics in Malaysia and Japanese Populations Using Power Plex Y23 System.
Abstract Population flow between Southeast Asian countries and Japan continues to gather pace. Accordingly, the number of foreigners involved in incidents in Japan has markedly increased, which means that forensic dentistry is now increasingly being faced with the need to analyze DNA from persons of non-Japanese extraction. The DNA test currently used for personal identification mainly utilizes short tandem repeats (STRs) on autosomal chromosomes and the Y-chromosome. This test was developed for use in personal identification, not for distinguishing among races; nonetheless, the standard method for personal identi...
Source: The Bulletin of Tokyo Dental College - June 10, 2020 Category: Dentistry Authors: Nakamura Y, Samejima M, Minaguchi K, Nambiar P, Hashimoto M Tags: Bull Tokyo Dent Coll Source Type: research

Extraction of Maxillary Impacted Teeth with Simultaneous Immediate Full Mouth Loading Using Long Implant: A Case Report.
Abstract Here, we describe the provision of an implant-supported prosthesis in a patient with impacted teeth in the maxilla, which complicated implant placement and necessitated utilization of the extraction sockets of previously impacted teeth and residual submerged roots. The patient was a 63-year-old man who visited our clinic with the chief complaint of difficulty in mastication. Numerous residual roots were observed in the maxilla, and radiographic imaging revealed that the residual roots of teeth #13 and #16 were fully impacted. The patient complained of a strong sensation of a foreign body in the area of a ...
Source: The Bulletin of Tokyo Dental College - June 5, 2020 Category: Dentistry Authors: Shimoo Y, Uesugi T, Hiruta M, Ishiura Y, Nakayama K, Watanabe T, Yamada K, Hirouchi H, Yamamoto M, Matsunaga S, Abe S Tags: Bull Tokyo Dent Coll Source Type: research

Intentional Replantation to Treat Apical Periodontitis of Maxillary First Molar with Foreign Body Located Outside Apical Foramen Using CBCT: A Case Report.
Abstract The recent use of cone beam computed tomography (CBCT) in the field of dentistry to obtain 3-dimensional (3D) images has enabled more effective examination and diagnosis in endodontic treatment. Such information has also been reported to be of benefit in surgical endodontic treatment such as intentional replantation. Here, we report a case of intentional replantation with the assistance of CBCT in which a good therapeutic outcome was achieved. The patient was a 30-year-old woman who visited our hospital with the chief complaint of spontaneous pain in the right maxillary first molar. Dental radiographs rev...
Source: The Bulletin of Tokyo Dental College - June 5, 2020 Category: Dentistry Authors: Fujii R, Morinaga K, Asai T, Aida N, Yamada M, Sako R, Furusawa M Tags: Bull Tokyo Dent Coll Source Type: research

Acupuncture Combined with Trigger Point Injection in Patient with Chronic Myofascial and Referred Pain.
Abstract Here, we report a case in which acupuncture combined with trigger point injection was effective in a patient with chronic myofascial pain with referred pain in the masticatory muscles. The patient was a 46-year-old woman with the chief complaint of chronic persistent pain in the region of the left mandibular first molar, which had been extracted 5 months earlier. Stellate ganglion block was performed and amitriptyline administered at another hospital, but were ineffective. At her initial visit to our hospital, her primary complaint was chronic persistent pain in the region of the bilateral mandibular firs...
Source: The Bulletin of Tokyo Dental College - June 5, 2020 Category: Dentistry Authors: Handa T, Ichinohe T Tags: Bull Tokyo Dent Coll Source Type: research

Implant and Prosthetic Treatment in Esthetic Zone with Alveolar Ridge Preservation and Autotransplantation: Clinical Case Report with 16-year Follow-up.
Abstract Occlusal reconstruction comprising orthodontic treatment, autotransplantation, and implant treatment was performed in a 30-year-old woman with missing maxillary anterior teeth. An initial examination revealed marked root resorption of the maxillary anterior teeth. Both the maxillary canines were missing, causing constriction of the dental arch. Conserving the right maxillary central and lateral incisors, which were dislocated due to trauma, was considered to be too difficult, and a bridge was not selected as there was insufficient load bearing capacity in the adjacent abutment teeth, making the prognosis ...
Source: The Bulletin of Tokyo Dental College - June 5, 2020 Category: Dentistry Authors: Yotsuya M, Nakano M, Umehara K, Nomura T, Sato T Tags: Bull Tokyo Dent Coll Source Type: research

Temporomandibular Joint Hypofunction Secondary to Unilateral Partial Discectomy Attenuates Degeneration in Murine Mandibular Condylar Cartilage.
Abstract Mechanical overloading of the temporomandibular joint (TMJ) promotes both the initiation and progression of TMJ osteoarthritis (OA). New preclinical animal models are needed for the evaluation of the molecular basis of cellular load transmission. This would allow a better understanding of the underlying mechanisms of TMJ-OA pain and disability, and help identify new therapeutics for its early diagnosis and management. The purpose of this study was to evaluate the role of mechanical loading in the progression of TMJ-OA in surgical instability arising from unilateral partial discectomy (UPD) in a murine mod...
Source: The Bulletin of Tokyo Dental College - February 27, 2020 Category: Dentistry Authors: Yotsuya M, Iriarte-Diaz J, A Reed D Tags: Bull Tokyo Dent Coll Source Type: research

Luminal, Intramural Unicystic Ameloblastoma with Marked Fluid-Fluid Level: Validity of CT and MRI Findings.
In conclusion, extensive imaging including both standard CT and MRI together with CE-MRI and DCE-MRI allowed mural protrusions or nodules on a thick cystic wall and liquid content to be correctly identified. This suggests that such imaging can play an important role in diagnosing a UA, even though the results were at first misleading due to the marked fluid-fluid level. PMID: 32074583 [PubMed - as supplied by publisher] (Source: The Bulletin of Tokyo Dental College)
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Wakoh M, Matsuzaka K, Imoto K, Goto T, Kamio T, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Investigation of Surgical Site Infections and Bacteria Detected Following Neck Dissection in Patients with Oral Cancer.
Abstract During dissection for oral cancer, there is a high probability of bacteria indigenous to the oral cavity migrating to the surgical field in the neck due to the opening of new pathways of communication with the oral cavity. The risk of postoperative surgical site infection (SSI) in such patients is high due to malnutrition arising from perioperative eating disorders and dysphagia. Neck infections after neck dissection in oral cancer patients were investigated to elucidate the development of SSIs and their relationship with the results of bacterial culture.A total of 86 patients with oral squamous cell carc...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Iwamoto M, Morikawa T, Narita M, Shibahara T, Katakura A Tags: Bull Tokyo Dent Coll Source Type: research

Anxiety and Sleep Quality in Dental Students at a Private Brazilian University.
Abstract The aim of this cross-sectional study was to evaluate the impact of anxiety and quality of sleep on quality of life (QOL) in undergraduate dental students. A total of 141 students were enrolled. All were required to answer the following questionnaires: the State-Trait Anxiety Inventory (STAI) subscale state (S) (STAI-S); the Sleep Assessment Questionnaire (SAQ); and the simplified World Health Organization Quality of Life survey (WHO QOL-bref). The statistical analysis included univariate and bivariate analyses and Poisson regressions. The mean age of the participants was 22.9 (SD=5.2) years; 81.6% were w...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: V Machado A, O Castro C, R Botelho Filho C, D Bruzamolin C, Scariot R, Pizzatto E, C L Gabardo M Tags: Bull Tokyo Dent Coll Source Type: research

Plaque-removing Effects of Interdental Instruments in Molar Region.
Abstract Many types of interdental instrument, such as dental floss and interdental brushes, can be purchased easily and sell in large numbers. Many studies have compared the effects of such instruments. Few studies have investigated their relationship with regions of residual plaque, however. The purpose of this study was to compare rates of plaque removal from the mesial and distal surfaces of the bilateral maxillary and mandibular premolars and molars among 3 types of interdental instrument: finger-winding-dental floss, holder-type dental floss, and an interdental brush. Prior to the experiment, the artificial ...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Hisanaga R, Shinya A, Sato T, Nomoto S, Yotsuya M Tags: Bull Tokyo Dent Coll Source Type: research

Periodontal Regenerative Therapy with Enamel Matrix Derivative and Autogenous Bone Graft in Patient with Chronic Periodontitis: An 18-month Follow-up Report.
We report a case of generalized chronic periodontitis requiring periodontal treatment including regenerative therapy. The patient was a 57-year-old who man presented with the chief complaint of gingival swelling and mobile teeth in the right maxillary molar region. An initial examination revealed 55.3% of sites with a probing depth of ≥4 mm and 24.0% with bleeding on probing. Radiographic examination revealed vertical bone resorption in teeth #16, 17, 25, 26, 37, and 45; horizontal resorption was also noted in other areas. Based on a clinical diagnosis of severe chronic periodontitis, initial periodontal therapy consist...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Yoshikawa K, Saito A, Tomita S Tags: Bull Tokyo Dent Coll Source Type: research

A Case of Fibrolipoma of the Hard Palate.
Abstract An extremely rare case of fibrolipoma in the hard palate is presented and discussed with reference to the literature. An 85-year-old woman visited the Tokyo Dental College Chiba hospital in September 2016 with the chief complaint of a mass in the hard palate. The patient had first become aware of this mass several years earlier. An examination at another hospital in June 2009 resulted in a clinical diagnosis of lipoma. Regular examinations followed every 6 months until September 2014, at which time she stopped attending these appointments because there was no change. In August 2016, however, the patient r...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Hayashi K, Yamada S, Onda T, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

How to Increase Number of Present Teeth in Elderly: Consideration of Percentile Curves for Present Teeth in Tokyo.
Abstract Maintaining dental and oral health and increasing healthy life expectancy are important issues for Japan as it deals with the rapid aging of its population. The purpose of this study was to determine effective dental health measures aimed at increasing the number of present teeth in the elderly. Change in the number of present teeth was determined based on data obtained from the 2009 and 2014 "Good Teeth Tokyo (Ii-ha Tokyo)" surveys carried out by the Tokyo Metropolitan Government. The number of present teeth and percentile curves were compared between these two time points. The number only show...
Source: The Bulletin of Tokyo Dental College - February 20, 2020 Category: Dentistry Authors: Tashiro M, Hirata S, Oozawa K, Shirai J, Taniguchi K, Kasahara N Tags: Bull Tokyo Dent Coll Source Type: research

Vertical Displacement in Unilateral Extension Base Flexible Removable Dentures.
Abstract The need for flexible thermoplastic denture base materials has increased due to patient demand for better esthetic outcomes. Designs aimed at improving esthetic outcomes can cause difficulties for prosthodontists, however, from the viewpoint of function and maintenance. Therefore, the purpose of this study was to investigate vertical displacement in unilateral extension base denture models, comparing that obtained by flexible removable dentures with that by conventional metal clasp dentures. Models of unilateral extension base flexible removable dentures for mandibular defects were prepared. Periodontal l...
Source: The Bulletin of Tokyo Dental College - November 23, 2019 Category: Dentistry Authors: Horie N, Ouchi T, Nishiyama R, Usuda S, Morikawa S, Asoda S, Nakagawa T Tags: Bull Tokyo Dent Coll Source Type: research

Expression Profiles of NOS Isoforms in Dental Pulp and Odontoblasts in nNOS Knockout Mice.
Abstract Active oxygen and free radicals are involved in metabolism in cells and tissues. Immunohistological studies of related enzymes are few, and the morphological dynamics of these enzymes in dental pulp and odontoblasts remain to be elucidated. Nitric oxide synthase (NOS) has 3 isoforms: nNOS, iNOS, and eNOS. The aim of this study was to investigate the profiles of NOS isoforms in the absence of nNOS in dental pulp and odontoblasts. Five-week-old male C57BL/6 and nNOS knockout (KO) mice were sacrificed and expression of nNOS, iNOS, and eNOS determined immunohistochemically. Expression of nNOS was positive, wh...
Source: The Bulletin of Tokyo Dental College - November 23, 2019 Category: Dentistry Authors: Ishizuka Y, Yoshida M, Ambe K, Sasaki J, Sugihara N, Watanabe H Tags: Bull Tokyo Dent Coll Source Type: research

"Easy-to-eat Meals" for Outpatients Following Dental Treatment.
"Easy-to-eat Meals" for Outpatients Following Dental Treatment. Bull Tokyo Dent Coll. 2019 Nov 22;: Authors: Ohkubo M, Ueda T, Miura K, Sugito H, Ono K, Seshima F, Morioka T, Uchiyama S, Yoshida M, Yajima Y Abstract Patients often experience temporary difficulty in masticating during the period immediately following dental treatment. The purpose of this study was to investigate subjectively assessed satisfaction with a specially designed diet for such patients by means of a questionnaire. These "easy-to-eat meals" were planned and provided by this hospital in Japan, and comprised a...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Ohkubo M, Ueda T, Miura K, Sugito H, Ono K, Seshima F, Morioka T, Uchiyama S, Yoshida M, Yajima Y Tags: Bull Tokyo Dent Coll Source Type: research

Demographics of Postgraduate Training Course at Tokyo Dental College Department of Orthodontics and Alumni Working Trends.
Abstract The postgraduate training course at the Department of Orthodontics of Tokyo Dental College, which started in April 1975, comprises a 3-year curriculum aimed at fostering orthodontic specialists. A system of Accreditation for Orthodontists was introduced by the Japan Orthodontic Society in 1990, since which time, this postgraduate training course has also sought to provide the basic training required to obtain such certification. The purpose of this study was to investigate the demographics of the students on this course and the current work status of its graduates by means of a questionnaire-based survey....
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Miyazaki H, Motegi E, Sueishi K Tags: Bull Tokyo Dent Coll Source Type: research

Expression of Cytokeratin in Experimentally Created Inflammatory Cyst in Vivo and in Vitro.
Abstract The purpose of this study was to investigate the behavior of epithelial lining derived from Malassez's epithelial rest (MER) cells in experimentally created inflammatory cysts in vivo and in vitro. Porcine MER cells were cultured in vitro with or without interleukin (IL)-1β (1 ng/ml) or IL-6 (1 ng/ml). Cell proliferation was assessed and expression levels of CK19 and CK13 mRNA determined using RT-PCR. In vivo, a cavity was created in the first molar of Sprague-Dawley male rats and tissue repair observed using immunohistochemical methods. In vitro, treatment with IL-1β or IL-6 increased prolifera...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Nakauchi A, Shintani S, Kokubu E, Nakajima K, Matsuzaka K, Inoue T Tags: Bull Tokyo Dent Coll Source Type: research

Ten-year Clinical Trends among 575 Consecutive Oral Cancer Patients at Tokyo Dental College Oral Cancer Center.
Abstract The facilities comprising Tokyo Dental College (TDC) -the college itself and its medical institutions at Suidobashi, Ichikawa, and Chiba - have been officially recognized as a center for treating oral cancer. The TDC Oral Cancer Center (OCC) was established on April 1, 2006. It provides comprehensive medical care, including that aimed at recovery of postoperative function, such as restoration of stomatognathic function, dysphagia therapy, and placement of maxillary prostheses. The purpose of this study was to investigate patient trends at TDC-OCC over the 10 years following its establishment in order to d...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Sekikawa S, Kozakai A, Saito H, Kawachi H, Ogane S, Takano M, Nomura T, Katakura A, Shibahara T, Takano N Tags: Bull Tokyo Dent Coll Source Type: research

Surgical Management of Median Cleft Lip Extending as Far as Alveolus Using Bone Grafting.
Abstract Median clefts, which run through the midline of the upper lip, and alveolus are considered a type of craniofacial cleft. A Tessier number 0 median cleft lip is the rarest, and there are few reports concerning its surgical management. Here, we describe the case of a 6-year-old boy who presented at our hospital with a median cleft and alveolus of the upper lip with a shortened bifid frenulum. Inverted-V and Z-plasty incisions were performed for the median cleft and iliac bone grafting for the midline alveolus. At 1 year 5 months later, the postoperative course was uneventful, and proper approximation of the...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Watanabe A, Yoshida S, Ishii T, Saito C, Shibahara T Tags: Bull Tokyo Dent Coll Source Type: research

Effectiveness of Communication Studies Program at Tokyo Dental College Based on Comments from Members of Public in Educational Organization.
Abstract The purpose of this study was to investigate the effectiveness of the Communication Studies Program at Tokyo Dental College as a tool in behavioral education. The number of Patient Community members who had participated in multiple sets of the program for third-year students in the same year within the 3-year period spanning 2016 to 2018 (152, 148, and 129 students in 2016, 2017, and 2018 respectively), and the period during which they had participated in multiple sets were investigated. Comments on student behavior, including on hairstyle, clothes, and attitude, were also analyzed. The total number of me...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Takahashi N, Yamamoto H, Hirata S, Sugihara N, Mochizuki R, Takahashi T, Mataki S, Katakura A Tags: Bull Tokyo Dent Coll Source Type: research

Correlations between Interleukin-33 and -1 α Levels in Gingival Crevicular Fluid and Plasma in Patients with Chronic or Aggressive Periodontitis and Disease-free Subjects.
Correlations between Interleukin-33 and -1α Levels in Gingival Crevicular Fluid and Plasma in Patients with Chronic or Aggressive Periodontitis and Disease-free Subjects. Bull Tokyo Dent Coll. 2019 Nov 22;: Authors: Pai B S, Pradeep AR Abstract Interleukin (IL)-33 is a dual-function protein that may play important roles as both a cytokine and intracellular nuclear factor. It may also function similarly to prototypical alarmin IL-1α, as an endogenous danger signal to alert innate immune system cells to tissue damage during trauma or infection, as it can be released in the extracellular spac...
Source: The Bulletin of Tokyo Dental College - November 22, 2019 Category: Dentistry Authors: Pai B S, Pradeep AR Tags: Bull Tokyo Dent Coll Source Type: research

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