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Bulletin of Tokyo Dental College

Mai Ohkubo, Takayuki Ueda, Hiroki Sugito, Akira Watanabe, Fumi Seshima, Toshiyuki Morioka, Yasutomo Yajima
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, conservative dentistry, oral and maxillofacial surgery (by both dentists and dietitians), oral implantation, and orthodontics...
2018: Bulletin of Tokyo Dental College
Mika Otonari-Yamamoto, Kei Nakajima, Junichiro Sakamoto, Kenichi Imoto, Motoko Watanabe, Shinya Kotaki, Migiwa Kuroda, Kenichi Matsuzaka, Takahiko Shibahara, Hugh D Curtin, Tazuko K Goto
On images, a dermoid cyst is often described as resembling a "sack of marbles" or "marbles in a bag". Typically, it comprises an inhomogeneity filled with multiple nodules in a fluid matrix on both computed tomography and magnetic resonance imaging (MRI). How it appears, however, will vary depending on its histological contents, which may cause confusion in arriving at a diagnosis. 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...
2018: Bulletin of Tokyo Dental College
Gentaro Mori, Takafumi Kobayashi, Taichi Ito, Yasutomo Yajima
Sjögren's syndrome (SS), an autoimmune disorder, affects the exocrine glands, including the lacrimal and salivary glands. It is characterized by symptoms of dry eye and dry mouth. As secretion of saliva decreases, patients with SS experience rampant caries, pain in the oral mucosa, inflammation and hardening of the salivary glands, abnormal taste, dysphagia, and loss of teeth earlier than healthy individuals. A removable partial denture is often used as a prosthesis after tooth loss. Compromised salivary lubrication, however, can produce traumatic ulceration of the mucosa, making use of a removable prosthesis in SS patients painful...
2018: Bulletin of Tokyo Dental College
Takeshi Onda, Kamichika Hayashi, Naoki Shiraishi, Nobuo Takano, Takahiko Shibahara
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...
2018: Bulletin of Tokyo Dental College
Masashi Eriguchi, Akira Watanabe, Kenichirou Suga, Youko Nakano, Teruo Sakamoto, Kenji Sueishi, Takeshi Uchiyama
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 treatment in the permanent dentition period; and at Time 3, on completion of active orthodontic treatment...
2018: Bulletin of Tokyo Dental College
Tetsuhide Makiguchi, Hiroki Imai, Aiko Arakawa, Ayako Tashiro, Takuro Yonezu, Seikou Shintani
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)...
2018: Bulletin of Tokyo Dental College
Koichiro Ogami, Takayuki Ueda, Masahiro Ryu, Sayaka Tajima, Kaoru Sakurai
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...
2018: Bulletin of Tokyo Dental College
Tadashi Kogou, Takashi Takaki, Takahiko Shibahara
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...
2018: Bulletin of Tokyo Dental College
Raghavendra S Medikeri, Vinayak Meharwade, Parikshit M Wate, Suresh V Lele
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...
2018: Bulletin of Tokyo Dental College
Toshihito Yoshimoto, Masamitsu Serikawa, Kazunari Higa, Kei Kitamura, Masaaki Kasahara, Masahito Yamamoto, Shinichi Abe
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...
2018: Bulletin of Tokyo Dental College
C N Guruprasad, A R Pradeep
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 II); 10 non-obese patients with chronic periodontitis (Group III); and 10 obese patients with chronic periodontitis (Group IV)...
2018: Bulletin of Tokyo Dental College
Naoki Tamura, Takashi Takaki, Nobuo Takano, Takahiko Shibahara
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...
2018: Bulletin of Tokyo Dental College
Akane Takenouchi, Hiroe Arai, Etsuyo Otani, Asami Fushimi, Takashi Matsukubo
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...
2018: Bulletin of Tokyo Dental College
Yuki Kojima, Mizuha Kojima, Kaori Nohara, Yutaka Sakaguchi
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...
2018: Bulletin of Tokyo Dental College
Katsutoshi Kokubun, Kenichi Matsuzaka, Yoshihiko Akashi, Masami Sumi, Kei Nakajima, Satoshi Murakami, Masato Narita, Takahiko Shibahara, Takashi Inoue
Congenital epulis is an unusual benign oral mucosal lesion in newborns with no tendency to recur after excision. The histogenesis of the lesion is unknown, but it is believed to be of mesenchymal origin. 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...
2018: Bulletin of Tokyo Dental College
Paulo Henrique Braz-Silva, Alan Motta do Canto, Leticia Oliveira, Fabiana Martins, Alessandro Antônio Pereira da Costa, João Adolfo Costa Hanemann
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...
2018: Bulletin of Tokyo Dental College
Daichi Kita, Takashi Kinumatsu, Yoshihito Ishii, Kazuya Yamanouchi, Atsushi Saito
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...
2018: Bulletin of Tokyo Dental College
Koichi Yoshino, Koji Ito, Masahiko Kuroda, Naoki Sugihara
Diagnosing vertical root fracture (VRF) is difficult. Here, we retrospectively investigated the duration from initial symptoms to a definite diagnosis of VRF in dental offices. Data were collected on patients with VRF between July 2013 and June 2015. Initial symptoms were ascertained from clinical records. The focus was on the maxillary second premolars and mesial roots of the mandibular first molars, where VRF is most frequent. All VRF in the bilateral dentition was analyzed. Only cases in which the buccal-lingual plane of the root was fractured were included...
2018: Bulletin of Tokyo Dental College
Svitlana Veniaminivna Kolomiiets, Kristina Oleksandrivna Udaltsova, Tetiana Andriivna Khmil, Alina Mykolaiivna Yelinska, Olena Anatoliivna Pisarenko, Viktoriya Ihorivna Shynkevych
Sialolithiasis is one of the most common and extensively obstructive disorders of the major salivary glands. Here, we report 3 cases of sialolithiasis in the submandibular salivary gland showing symptomatic similarities to other dental and non-dental disorders of the maxillofacial area. How the various clinical features of this condition and findings on 3D-CT may lead to a misdiagnosis are also discussed. In the first case, that of a 45-year-old woman, a final diagnosis of a non-radiopaque submandibular sialolith allowed the initially indicated surgical extraction of a malerupted and semi-impacted right mandibular 3rd molar to be abandoned...
2018: Bulletin of Tokyo Dental College
Hodaka Sasaki, Tomoki Hirano, Syuntaro Nomoto, Yasushi Nishii, Yasutomo Yajima
Here, we report a case of dental implant treatment involving computer-assisted surgery for bilateral agenesis of the maxillary lateral incisors. The patient was a 39-year-old woman with the chief complaint of functional and esthetic disturbance due to maxillary and mandibular malocclusion. The treatment plan comprised non-extraction comprehensive orthodontic treatment and prosthodontic treatment for space due to the absence of bilateral maxillary lateral incisors. A preliminary examination revealed that the mesiodistal spaces left by the absent bilateral maxillary lateral incisors were too narrow for implant placement (right, 5...
2018: Bulletin of Tokyo Dental College
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