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Bulletin of Tokyo Dental College

Naoko Takahashi, Hitoshi Yamamoto, Satoshi Murakami, SoIchiro Hirata, Naoki Sugihara, Riuji Mochizuki, Toshiyuki Takahashi, Yuko Sato, Eiji Kawada
In 2009, the Ministry of Education, Culture, Sports, Science and Technology launched its "Program for Promoting University Education and Student Support, Theme A: Program for Promoting University Education Reform". The ministry's stated aims were to 1) enhance student training centered on the needs of the individual patient; 2) improve their ability to make comprehensive diagnosis and treatment plans; and 3) instill high ethical standards and good communication skills. One of the main pillars of this project was to establish an educational organization aimed at encouraging public participation, the "Patient Community"...
2016: Bulletin of Tokyo Dental College
Maryam Gharechahi, Parisa Dastmalchi
Here, we report the diagnosis and treatment of an extraoral cutaneous sinus tract originating in a mandibular second molar with a C-shaped root canal system. The patient was referred to our department by a dermatologist after a series of unsuccessful treatments, including antibiotics. Diffuse radiolucency on a preoperative radiograph revealed that earlier root canal treatment had been only partially successful. Consequently, we performed retreatment of the root canal comprising removal of the former restoration and gutta-percha, cleaning and shaping, and passive irrigation with sodium hypochlorite...
2016: Bulletin of Tokyo Dental College
Seitaro Suzuki, Yuki Kojima, Atsushi Takayanagi, Koichi Yoshino, Yoichi Ishizuka, Ryouichi Satou, Naoko Takahashi, Masakazu Tazaki, Hideyuki Kamijo, Naoki Sugihara
The purpose of this study based on a cross-sectional internet survey was to investigate the relationship between risk of obstructive sleep apnea (OSA) and self-assessed oral health status. The participants, who comprised individuals registered with an online research company, were required to complete a self-reported questionnaire. Those answering in the affirmative to both of the following two questions were placed in the OSA-risk group, while those answering in the negative were assigned to the control group: 'Have other people noticed pauses in your breathing while you are sleeping?' and 'Do you feel excessively sleepy during the daytime?'...
2016: Bulletin of Tokyo Dental College
Toshiyuki Handa, Takaaki Onodera, Yoshifumi Honda, Yoshihiko Koukita, Tatsuya Ichinohe
This study retrospectively compared blood loss during sagittal split ramus osteotomy in patients receiving propofol-remifentanil (R group) and those receiving propofol-fentanyl (F group). All patients underwent sagittal split ramus osteotomy under general anesthesia during the 3-year 4-month period between October 2007 and February 2011 in an operating room at Tokyo Dental College Suidobashi Hospital. Blood loss in the R group was significantly less than that in the F group. Mean arterial pressure and heart rate, measured at 20 and 15 min after tracheal intubation, respectively, were both lower in the R group...
2016: Bulletin of Tokyo Dental College
Takenobu Ishii, Teruo Sakamoto, Munetada Ishikawa, Toshihiko Yasumura, Haruyo Miyazaki, Kenji Sueishi
The present study targeted patients with unilateral cleft lip and palate (UCLP) undergoing either one - (Wardill technique) or two-stage palatoplasty (Perko technique). Correlations between Goslon Yardstick scores and orthodontic appliances used and whether an osteotomy was performed were investigated. No differences were observed between the two types of palatoplasty in terms of Goslon Yardstick scores. A palatal expander and protraction facemask were used in Phase I of orthodontic treatment. The palatal expander was selected for most patients with UCLP in Phase I, regardless of the surgical technique used...
2016: Bulletin of Tokyo Dental College
Taeko Kanemoto, Hiroki Imai, Atsuo Sakurai, Hongwei Dong, Sizhen Shi, Masashi Yakushiji, Seikou Shintani
The prevalence of dental caries has been decreasing among kindergarten children in Shanghai, China, over recent years, although it still remains at an unacceptably high level. The purpose of this study was to identify which factors were important in providing oral health guidance and achieving further improvement in the oral health status of kindergarten children in urban China. A survey was conducted on dental caries in 128 Japanese and 368 Chinese kindergarten children and a questionnaire given to their parents/guardians on each child's lifestyle and dietary habits from birth to the present...
2016: Bulletin of Tokyo Dental College
Masato Narita, Takahiko Shibahara, Nobuo Takano, Rie Fujii, Katsuji Okuda, Kazuyuki Ishihara
Periapical periodontitis usually results from microbial infection, with these microorganisms occasionally migrating to the root canal, which can lead to further, potentially life-threatening, complications. Here, the susceptibility of 27 bacterial strains to various antimicrobial agents was evaluated. These strains comprised 13 species; 16 of the strains were clinical isolates from periapical lesions. Each strain was inoculated onto blood agar plates containing one of the antimicrobial agents. The plates were incubated anaerobically at 37°C for 96 hr and the minimal inhibitory concentrations (MICs) determined...
2016: Bulletin of Tokyo Dental College
Shinya Takahashi, Ryuta Kikuchi, Kimiharu Ambe, Toshihiro Nakagawa, Satoshi Takada, Takashi Ohno, Hiroki Watanabe
Type I diabetes, an autoimmune disease, induces insulin deficiency, which then disrupts vascular endothelial cell function, affecting blood and lymphatic vessels. Nitric oxide (NO) is an immune-induced destructive mediator in type I diabetes, and inhibition of its production promotes arteriosclerosis. In this study, lymphangiogenesis and expression of NO synthase (NOS) during the healing process after tooth extraction were investigated immunohistochemically in control (C57BL) and Akita mice as a diabetes model...
2016: Bulletin of Tokyo Dental College
Daisuke Irokawa, Asako Makino-Oi, Takahisa Fujita, Shigeki Yamamoto, Sachiyo Tomita, Atsushi Saito
Here we report a case of generalized aggressive periodontitis treated with periodontal therapy including adjunct antimicrobial therapy and periodontal surgery. The patient was a 22-year-old woman who presented with the chief complaint of gingival recession. Baseline examination revealed generalized plaque deposition and gingival inflammation. Thirty-nine percent of the sites had a probing depth (PD) of 4-6 mm and 2% a PD of ≥7 mm; 63% exhibited bleeding on probing (BOP). Radiographic examination revealed vertical bone loss in the molars and horizontal bone loss in other teeth...
2016: Bulletin of Tokyo Dental College
Fumi Seshima, Makiko Nishina, Takashi Namba, Atsushi Saito
We report a case of generalized chronic periodontitis and type 2 diabetes mellitus requiring periodontal treatment including regenerative therapy. The patient was a 66-year-old man who presented with the chief complaint of gingival inflammation and mobile teeth in the molar region. He had been being treated for type 2 diabetes mellitus since 1999. His glycated hemoglobin (HbA1c) level was 7.8%. An initial examination revealed sites with a probing depth of ≥7 mm in the molar region, and radiography revealed angular bone defects in this area...
2016: Bulletin of Tokyo Dental College
Kamichika Hayashi, Takeshi Onda, Hitoshi Ohata, Nobuo Takano, Takahiko Shibahara
Here we report a case of Kussmaul's disease, or sialodochitis fibrinosa. This rare disease is characterized by recurrent swelling of the salivary glands, which then discharge clots of fibrin into the oral cavity. An 80-year-old man with a history of allergic rhinitis visited our department with the chief complaint of pain in the bilateral parotid gland area on eating. An initial examination revealed mild swelling and tenderness in this region, and indurations could be felt around the bilateral parotid papillae...
2016: Bulletin of Tokyo Dental College
Adriano C do Nascimento, André A F Marques, Emílio C Sponchiado-Júnior, Lucas F R Garcia, Fredson M A de Carvalho
Taurodontism is a developmental tooth disorder characterized by lack of constriction in the cementoenamel junction and consequent vertical stretch of the pulp chamber, accompanied by apical displacement of the pulpal floor. The endodontic treatment of teeth with this type of morpho-anatomical anomaly is challenging. The purpose of this article is to report the successful endodontic treatment of a hypertaurodontic mandibular molar using a reciprocating single-file system.
2016: Bulletin of Tokyo Dental College
Takaharu Sakayori, Yoshinobu Maki, Mai Ohkubo, Ryo Ishida, SoIchiro Hirata, Takuo Ishii
Change in oral function was evaluated longitudinally in elderly persons participating in an Exercises for Healthy Oral Function program implemented as part of the Long-Term Care Prevention Project. The participants comprised high-risk and healthy persons aged 65 yr or over. A questionnaire was used to classify them into two groups ('every day or sometimes' or 'rarely') at the end of the study for a comparison of change in repetitive saliva swallowing test (RSST) scores and oral diadochokinesis between 3 time points: at before, at immediately after, and at 1 yr after completion of the program...
2016: Bulletin of Tokyo Dental College
Yasushi Ogino, Syuntaro Nomoto, Toru Sato
The purpose of this study was to investigate the influence of the cross-sectional form and area of the connector on fracture resistance in three-unit zirconia fixed partial denture (FPD) frameworks for the upper anterior region. Sixty FPD framework specimens were fabricated using the CAD/CAM system. The cross-sectional form (Type I, II, or III) and area (9.0, 7.0, 5.0, or 3.0 mm(2)) of the connectors differed. The specimens were fixed to a jig capable of applying a load axially to the abutment teeth at an angle of 135 degrees...
2016: Bulletin of Tokyo Dental College
Mina Zarei, Maryam Javidi, Maryam Gharechahi, Moaied Kateb, Reza Zare, Ziba Shirkhani Kelagari
The purpose of this study was to compare the biocompatibility of two types of calcium hydroxide paste in subcutaneous tissue in rat. Twenty-two Wistar rats were divided into 4 experimental (n=5 each) and one control (n=2) group. A polyethylene tube filled with either Dentsply or Sure-Paste was implanted in each rat in the experimental groups, while an empty polyethylene tube was used in the control group. After 15 or 60 days, the animals were sacrificed and histopathological examination carried out. Tissue reaction was assessed by inflammatory cell infiltration using a 4-point scoring system, ranging from 0 to 3...
2016: Bulletin of Tokyo Dental College
Takashi Muramatsu, Sadamitsu Hashimoto, Fumio Ide
No abstract text is available yet for this article.
2016: Bulletin of Tokyo Dental College
Takeo Shibui, Takeshi Nomura, Nobuo Takano, Akira Katakura, Yoko Nakano, Kenichiro Suga, Masato Narita, Akira Watanabe, Kyotaro Muramatsu, Kiyoshi Takamatsu
Remarkable technological advances have been made in the field of medicine in recent years, one result of which is that a prenatal diagnosis of cleft lip and/or cleft palate (CL/P) is now possible. In this situation, it is extremely important to provide the parents with mental care from the moment they are informed. Here, we describe cases of CL/P treated at our hospital and how such a diagnosis and prenatal counseling are handled. A survey was carried out on 4 cases seen at our department between April 2013 and March 2014...
2016: Bulletin of Tokyo Dental College
Dakshita Joy Sinha, Ashish Amit Sinha, Prem Prakash, Natasha Jaiswal
Multiple canals in the root are part of the normal morphology of the tooth. A canal may sometimes be overlooked, however, and this may lead to failure of treatment. The first step in successful endodontic treatment, therefore, is gaining access to the pulp chamber and locating all the canals. In order to achieve this goal, practitioners need to be familiar with all possible variations in root canal morphology, and should thoroughly explore roots to ensure that all canals are identified, debrided, and obturated...
2016: Bulletin of Tokyo Dental College
Jun Yoshizumi, Kenji Sueishi
The purpose of this study was to compare post-treatment stability in Angle Class III cases grouped by treatment modality into extraction, non-extraction, or surgical. Twenty-seven Angle Class III patients (9 men, 18 women) were selected from among the records of qualified retention cases treated at the Department of Orthodontics, Tokyo Dental College. The patients were divided into the following groups: Group 1, extraction (n=10); Group 2, non-extraction (n=9); and Group 3, surgery (n=8). Lateral cephalograms, panoramic X-rays, and study casts were obtained at baseline (T0), after active treatment (T1), and after retention (T2)...
2016: Bulletin of Tokyo Dental College
Marcos Ximenes, Carolina Mayumi Cavalcanti Taguchi, Thaisa Cezaria Triches, Neimar Sartori, Luis Alberto Pereira Dias, Elaine Bortoleti de Araujo, Mariane Cardoso
Proper cleaning of the root canal is key to the success of endodontic treatment as it allows more effective diffusion of medication throughout the dentinal tubules. The aim of this in vitro study was to investigate the efficacy of 17% ethylenediaminetetraacetic acid (EDTA) in enhancing diffusion of hydroxyl (OH(-)) and calcium ions (Ca(2+)) throughout the root canal in primary teeth. The canals of 25 primary tooth roots were cleaned with endodontic files and 1% sodium hypochlorite. Three groups (G) were then established: GI, in which final irrigation was performed with 1% sodium hypochlorite; GII, in which 17% EDTA was used; and GIII, in which no irrigation was performed...
2016: Bulletin of Tokyo Dental College
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