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Bulletin of Tokyo Dental College

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https://www.readbyqxmd.com/read/28381737/alveolar-growth-in-japanese-infants-a-comparison-between-now-and-40-years-ago
#1
Hiroki Imai, Tetsuhide Makiguchi, Aiko Arakawa, Ayako Tashiro, Takuro Yonezu, Seikou Shintani
To investigate differences in alveolar growth during the primary dentition period among different age groups, dental arch width, length, and height were measured in 93 dental arch plaster models obtained from 4-year-olds born between 1968 and 1974, 88 from 5-year-olds born between 1968 and 1974 (70s group), 61 from 4-year-olds born between 2007 and 2009, and 56 from 5-year-olds born between 2006 and 2008 (2000s group). A comparison was also performed to determine whether there was any difference in change between 4 and 5 years of age...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381736/relationship-between-time-from-full-pulpotomy-to-definitive-diagnosis-of-vertical-root-fracture-and-patient-age
#2
Koichi Yoshino, Koji Ito, Masahiko Kuroda, Naoki Sugihara
The goal of this study was to investigate length of time between full pulpotomy and a definitive diagnosis of vertical root fracture (VRF), as well as the age at which this was made. The participants comprised 63 dental patients (40 men and 23 women) with a mean age of 65.7±10.4 years in whom a definitive diagnosis of VRF had been made between July 2013 and June 2015, and who had also undergone a full pulpotomy. The data on all these cases were obtained from 22 dental clinics belonging to a clinical study group...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381735/status-of-clinical-training-at-tokyo-dental-college-and-subsequent-career-pathway-focusing-on-training-facilities-and-programs
#3
Ryuichi Hisanaga, Toshiyuki Takahashi, Toru Sato, Mamoru Yotsuya, Akimasa Shinya, Nahoko Miyake
The goal of the present study was to clarify the status of training in clinical dentistry at training facilities belonging to Tokyo Dental College by investigating trainee quota fill rates and analyzing the relationship between selection of training program and subsequent career pathway. The trainees were divided into 4 groups based on career pathway after training: those entering graduate school; those becoming residents; those remaining at the college or hospital to take specialized clinical courses or for other purposes; and those starting work outside the college...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381734/implant-supported-oral-rehabilitation-in-child-with-ectodermal-dysplasia-4-year-follow-up
#4
Thaisa Cezária Triches, Marcos Ximenes, João Gustavo Oliveira de Souza, Armando Rodrigues Lopes Pereira Neto, Antônio Carlos Cardoso, Michele Bolan
Ectodermal dysplasia (ED) is an anomaly determined by genetic factors that alter ectodermal structures such as skin, hair, nails, glands, and teeth. Children affected by this condition require extensive, comprehensive, and multidisciplinary treatment. An 8-year-old female patient visited the Dentistry Clinic of the Federal University of Santa Catarina with the chief complaint of multiple missing teeth. The mother reported that the patient had ED. Clinical and radiographic examination revealed the congenital absence of several primary and permanent teeth and tooth germs...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381733/tooth-auto-transplantation-an-alternative-treatment
#5
Jawaad Ahmed Asif, Tahir Yusuf Noorani, Mohammad Khursheed Alam
Auto-transplantation is the repositioning of an autogenously erupted, partially erupted, or unerupted tooth from one site to another in the same individual. The purpose of this case report is to describe the auto-transplantation of the mandibular third molars as an alternative means of replacing second molars requiring extraction. An orthopantomogram revealed horizontal impaction of teeth #37 and 47 and mesio-angular impaction of teeth #38 and 48. Cone beam computed tomography revealed that the roots of #37 and 47 were in close proximity to the inferior alveolar canal bilaterally...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381732/intentions-and-factors-regarding-selection-of-workplace-by-postgraduate-dental-trainees-after-clinical-training
#6
Yoshikazu Okawa, SoIchiro Hirata, Ikuo Nasu, Yukio Hirata
The purpose of the present study was to investigate the reasons governing selection of geographical location of workplace by postgraduate dental trainees. We believe that such data would aid in the development of measures aimed at reducing regional disparities in the number of dentists. A total of 10 dental colleges and faculties in Japan were invited to participate in the study. Anonymous, self-completed questionnaire surveys were given to 739 dentists at 13 clinical training facilities following training in 2012 and 2013; 713 responses were analyzed...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381731/efficiency-of-closed-mastication-of-gummy-evaluated-with-gnatho-hexagraph
#7
Chiharu Shima, Etsuko Motegi, Akiyo Horiuchi, Takenobu Ishii, Mayumi Nomura, Makoto Nakao, Kenji Sueishi
The aim of this study was to determine whether chewing with closed lips improved masticatory efficiency compared with open lips. A total of 21 adults comprising 10 men and 11 women with a mean age of 26.2±3.5 years and normal masticatory function were included in the study. The study participants were instructed to chew a fresh gummy under two conditions for 30 seconds each, one after the other: the first with closed lips, and the second with open lips. The average size of the fragmented gummies was calculated and graded from 1 to 4 according to a specific scale...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381730/swallowing-rehabilitation-affects-period-of-hospitalization-after-surgery-for-tongue-cancer
#8
Mai Ohkubo, Tetsuya Sugiyama, Mariko Ohira, Masanao Yamamoto, Tatsuya Iguchi, Takahiko Shibahara, Nobuo Takano, Ryo Ishida
Functional rehabilitation has been reported to improve swallowing. The effect of the presence or absence of such rehabilitation has yet to be compared in oral cancer patients, however. The purpose of this study was to investigate its effect on correlations between the period of hospitalization and the period of tube feeding (from the day of surgery to termination of tube feeding) and period of oral nutrition (from termination of tube feeding to discharge). Body weight was also measured on admission and discharge and the difference calculated...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381729/relationship-between-general-health-lifestyle-oral-health-and-periodontal-disease-in-adults-a-large-cross-sectional-study-in-japan
#9
Miki Kitagawa, Tsukasa Kurahashi, Takashi Matsukubo
The aim of this study was to investigate how general health, oral conditions, and lifestyle were associated with periodontal disease in adults, as clarifying this relationship may be useful in preventing periodontal disease. Medical checkups were conducted on individuals aged 40, 50, or 60 years. Data were obtained for analysis on a total of 36,110 patients (men, 12,784; women, 22,896). A stepwise logistic regression model was used to calculate the odds ratio (OR) for patients who were ≥code 3 according to the Community Periodontal Index (CPI)...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049978/analysis-of-needlestick-and-similar-injuries-over-10-years-from-april-2004-at-tokyo-dental-college-chiba-hospital
#10
Kazuki Morinaga, Keiko Hagita, Takashi Yakushiji, Hitoshi Ohata, Kenji Sueishi, Takashi Inoue
Here we investigated needlestick and similar injuries reported over a 10-year period between April 2004 and March 2014. The purpose of this study was to prevent recurrence and reduce the incidence of such injuries at Tokyo Dental College Chiba Hospital. The Division of Medical Risk Management at Chiba Hospital anonymized the data to protect personal information prior to analysis. A total of 213 injuries occurred over the 10-year period investigated, but the number of cases decreased yearly. Many cases involved dental undergraduate students and dentists, followed by trainee dentists, students at the school of dental hygiene, nurses, dental hygienists, and cleaners...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049977/cbct-based-diagnosis-of-periapical-lesion-of-maxillary-first-premolar-mimicking-that-of-second-premolar
#11
Rie Fujii, Masataka Suehara, Sayo Sekiya, Norihito Miyayoshi, Tomohiro Asai, Kazuki Morinaga, Takashi Muramatsu, Masahiro Furusawa
Apical periodontitis is usually diagnosed based on clinical findings and dental X-rays. Recently, however, dental cone beam computed tomography (CBCT), which provides 3-D images of the maxillofacial region, has enabled dentists to examine patients undergoing endodontic therapy more effectively, improving diagnostic accuracy. Here, we describe a positive treatment outcome achieved using CBCT to diagnose apical periodontitis of the maxillary premolars, which had proven difficult to diagnose based on clinical findings and dental radiography alone...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049976/posterior-open-bite-due-to-failure-of-maxillary-molar-eruption
#12
Toshihiko Yasumura, Kenji Sueishi
Posterior open bite can cause problems with occlusion. It arises from systemic or local factors such as physical or functional interference, ankylosis, and failure of eruption. Primary failure of eruption (PFE) is a rare condition that is difficult to differentiate from ankylosis and requires complex treatment strategies. Here we report a 12-year-old girl who was referred to our hospital by her dentist for re-evaluation of eruption failure of the left maxillary secondary premolar and first and second molars with congenitally missing maxillary lateral teeth...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049975/bilateral-scissor-bite-treated-by-rapid-mandibular-expansion-following-corticotomy
#13
Teruo Sakamoto, Kotaro Hayakawa, Takenobu Ishii, Kunihiko Nojima, Kenji Sueishi
Scissor bite is defined as buccal displacement of the maxillary posterior teeth, with or without contact between the lingual surface of the maxillary lingual cusp and the buccal surface of the buccal cusp of its mandibular antagonist. Here we report treatment of bilateral scissor bite in the posterior region using rapid expansion following corticot-omy. The patient was a boy aged 17 years and 11 months in whom skeletal maxillary prognathism with bilateral scissor bite was diagnosed. The distance between the tips of canines and the mesial buccal cusps of the first molars was increased by use of a bonded rapid expansion appliance following corticotomy...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049974/periodontal-surgery-involving-modified-widman-flap-procedure-and-connective-tissue-graft-for-generalized-aggressive-periodontitis-a-case-report
#14
Kentaro Imamura, Yuri Okamura, Yasugi Matsumoto, Yuko Mashimo, Sachiyo Tomita, Hiroki Sugito, Atsushi Saito
We report a case of generalized aggressive periodontitis (AgP) requiring periodontal treatment including flap surgery and ridge augmentation. The patient was a 39-year-old woman who presented with the chief complaint of pus discharge from tooth #36. No other obvious signs of gingival inflammation were observed. Periodontal examination revealed multiple sites with a probing depth of ≥10 mm. Radiography showed pro-nounced bone defects in the maxillary incisors and molar region. Real-time PCR was used to detect Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, and Tannerella forsythia in subgingival plaque; all 3 pathogens were found...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049973/radix-entomolaris-a-report-of-two-cases
#15
Dakshita Joy affSinha, Sunita Mahesh, Natasha Jaiswal, Agrima Vasudeva
A comprehensive knowledge of the anatomy of the root canal is a basic prerequisite for the success of endodontic treatment. Mandibular molars may have an additional root located lingually (radix entomolaris) or buccally (radix paramolaris). An awareness of the potential for and understanding of unusual external and internal root canal mor-phology contributes to the successful outcome of root canal treatment. Here, we report two cases of radix entomolaris to increase awareness and understanding of this unusual morphology so that procedural errors during endodontic therapy might better be avoided...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049972/expression-of-cytokeratin-13-14-17-and-19-in-4-nitroquinoline-1-oxide-induced-oral-carcinogenesis-in-rat
#16
Tomoyoshi Saitoh, Kazumichi Sato, Morio Tonogi, Yoichi Tanaka, Gen-Yuki Yamane
The management of epithelial dysplastic spread around an oral squamous cell carci-noma is very important, particularly intraoperatively. Both cytokeratin (CK) 14 and CK19 are believed to be involved in the development of precancerous lesions, and their expression profiles are quite specific in these and early cancer lesions. Here, expression of CK13, 14, 17, and 19 was investigated in a rat model of 4-nitroquinoline-1-oxide-induced tongue cancer during a series of carcinogenetic processes to determine their value in assessing the features of epithelial dysplastic spread around a cancer...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049971/population-genetics-of-identifiler-system-in-malaysia
#17
Yasutaka Nakamura, Michinaga Samejima, Kiyoshi Minaguchi, Phrabhakaran Nambiar
Short tandem repeat (STR) polymorphisms were investigated in 341 unrelated Malay individuals (218 males and 123 females) living in or around Kuala Lumpur by using a forensic analysts kit. The following STRs were targeted: D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, vWA, TPOX, D18S51, D5S818, and FGA. The purpose of this study was to elucidate population genetics in Malaysia and calculate statistical parameters for forensic and anthropological research. Data on these STRs in the target population were obtained and subjected to statistical analysis...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049970/regional-anatomical-observation-of-morphology-of-greater-palatine-canal-and-surrounding-structures
#18
Masashi Suzuki, Yuya Omine, Yoshiaki Shimoo, Masahito Yamamoto, Akihiro Kaketa, Masaaki Kasahara, Masamitu Serikawa, Sunki Rhee, Tadatoshi Matsubayashi, Satoru Matsunaga, Shinichi Abe
In maxillary molar region implant therapy, support is sometimes obtained from trabecular bone comprising the maxillary tuberosity, pterygoid process of the sphenoid bone, and pyramidal process of the palatine bone. Great care is necessary in such cases due to the presence of the greater palatine canal, which forms a passageway for the greater palatine artery, vein, and nerve. However, clinical anatomical reports envisioning embedding of pterygomaxillary implants in this trabecular bone region have been limited in number...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28049969/correlation-between-finger-length-and-occlusal-vertical-dimension-in-adult-sudanese-women
#19
Mohammed Nasser Alhajj, Nassir J Musaad, Ibrahim A Ismail
The objective of this study was to investigate the correlation between the length of each of three fingers (the index finger, 2D; ring finger, 4D; and little finger, 5D) and the occlusal vertical dimension (OVD). If such a relationship were established, it would simplify and facilitate the prediction and reestablishment of the OVD in the construction of complete dentures. The correlation between the OVD and the length of 2D or 5D has already been investigated in a number of studies. However, to our knowledge, no study has investigated the relationship between the length of 4D and the OVD...
2016: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/27665697/participation-of-patient-community-members-in-communication-classes-for-dental-students-at-tokyo-dental-college
#20
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
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