著者

Hiroshi Koga Atsushi Yamagishi Atsushi Takayanagi Kohji Maeda Takashi Matsukubo

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.48, no.3, pp.119-128, 2007 (Released:2007-12-05)

参考文献数

16

被引用文献数

7 9

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Fluoride dentifrice has been accepted widely for use in caries prevention and its effectiveness has been confirmed. In order to enable the use of fluoride dentifrice effectively in daily brushing, the present study was performed to examine the relationship between fluoride uptake and the amount of fluoride dentifrice used and brushing time for adults. We examined the relationship between fluoride uptake into the surface layer (4-6 μm)of enamel and the active fluoride concentration in vitro and the relationship between the amount of fluoride dentifrice (1,000ppmF) used and the fluoride concentration in oral fluid in vivo. It became clear that fluoride uptake into the enamel was increased at the concentrations of 300ppmF or more. Fluoride uptake at 300ppmF was increased for 2min and became saturated thereafter. The results of the relationship between the fluoride concentration in the oral fluid and the amount of fluoride dentifrice used indicated that the amount of dentifrice that could maintain the mean fluoride concentration at 300ppm or more for 2min was 1.0g or more. From these results, the recommended amount of fluoride dentifrice (1,000ppmF) is 1.0g or more for adults.

著者

Kenichiro Suga Satoru Ogane Kyotaro Muramatsu Hitoshi Ohata Takeshi Uchiyama Nobuo Takano Takahiko Shibahara Jun Eguchi Satoshi Murakami Kenichi Matsuzaka

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.54, no.1, pp.19-25, 2013 (Released:2013-04-23)

参考文献数

14

被引用文献数

6 10

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Schwannomas (neurilemmomas) are benign neoplasms derived from Schwann cells of the neurilemma and appear most frequently on the auditory nerve or peripheral nerves of the skin. They arise in the oral and maxillofacial region infrequently, and very rarely in the center of the jaw. We herein present a case of a rare mandibular intraosseous schwannoma derived from the main trunk of the inferior alveolar nerve in a 33-year-old man. Fusiform expansion in the mandibular canal was observed and a mass showing the target sign in the mandibular canal was confirmed on T2-weighted and Gd contrastenhanced T1-weighted MRI. Based on these findings, an inferior alveolar nerve-derived schwannoma or other benign nervous system neoplasm was diagnosed. A buccal side cortical bone flap in the mandibular molar region was removed to expose the mass, which was then peeled away from the nerve fibers and completely removed. Some inferior alveolar nerve fibers that were connected to the mass were removed at the same time, but the remaining nerve fiber bundle was preserved. Histopathology confirmed the diagnosis of a schwannoma with Antoni type A and Antoni type B regions. Although the patient experienced extremely mild paresthesia in the skin over the mental region and mental foramen at immediately after surgery, this had almost entirely disappeared at 7 years and 4 months later, and there has been no tumor recurrence.

著者

Norio Kasahara Satoru Matsunaga Masashi Yamada Yasutaka Nakamura Munetsugu Tashiro Masatsugu Hashimoto

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

pp.2019-0015, (Released:2020-06-10)

参考文献数

14

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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 amount claimed in trials held by medical malpractice divisions (¥12,563,324) was lower than that sought in trials conducted by ordinary divisions. The amount accepted was also found to exceed 50% of the amount claimed in 6 trials held by ordinary divisions (maximum 75.2%), but in only 2 trials conducted by medical malpractice divisions (maximum 54.8%); the mean amount accepted in trials held by medical malpractice divisions was 24.2%. These results indicate that judgments in trials conducted by medical malpractice divisions place a stronger emphasis on resolution of dental malpractice dispute than on pursuing truth or carrying out proper legal procedures.

著者

Tsukasa Kurahashi Miki Kitagawa Takashi Matsukubo

出版者

東京歯科大学

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.58, no.2, pp.85-94, 2017 (Released:2017-07-19)

参考文献数

63

被引用文献数

1

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The purpose of this study was to identify which factors were associated with number of present teeth (PT) in older adults as their clarification might contribute to maintaining the number of PT in this population. These factors were investigated by means of a questionnaire on oral health condition, general health behavior, and anamnesis of diabetes mellitus together with a dental examination. Data were obtained from a total of 7,741 Japanese subjects (2,623 males and 5,118 females), all of whom were aged 40, 50, or 60 years. Significant differences were observed in the mean number of PT between a positive or negative response to questions on anamnesis of diabetes mellitus, current smoking, and having loose teeth in all age groups in males; significant differences were also observed for current smoking, lower intake of dairy milk products, having loose teeth, no experience of tooth brushing instruction, and poor oral hygiene status in all age groups in females. Stepwise logistic regression analysis revealed having loose teeth (odds ratio [OR], 1.82), gingival swelling (OR, 1.40), an anamnesis of diabetes mellitus (OR, 1.72), current smoking (OR, 1.86), lower intake of dairy milk products (OR, 1.22), preference for salty seasonings (OR, 1.23), frequent sweet intake (OR, 1.29), no experience of tooth brushing instruction (OR, 1.38), and poor oral hygiene (OR, 2.04) as significant risk factors for the number of PT being <24 after adjusting for age and sex. These results indicate that an anamnesis of diabetes mellitus, a history of smoking, the presence of loose teeth, and poor oral hygiene status in a self-reported evaluation of oral health might correlate with <24 PT in older adults.

著者

Takeshi Kawai Yutaka Watanabe Morio Tonogi Gen-yuki Yamane Shinichi Abe Yoshiaki Yamada Akiko Callan

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.50, no.4, pp.169-181, 2009 (Released:2010-02-23)

参考文献数

32

被引用文献数

7 11

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We focused on brain areas activated by audiovisual stimuli related to swallowing motions. In this study, three kinds of stimuli related to human swallowing movement (auditory stimuli alone, visual stimuli alone, or audiovisual stimuli) were presented to the subjects, and activated brain areas were measured using fMRI and analyzed. When auditory stimuli alone were presented, the supplementary motor area was activated. When visual stimuli alone were presented, the premotor and primary motor areas of the left and right hemispheres and prefrontal area of the left hemisphere were activated. When audiovisual stimuli were presented, the prefrontal and premotor areas of the left and right hemispheres were activated. Activation of Broca's area, which would have been characteristic of mirror neuron system activation on presentation of motion images, was not observed; however, activation of brain areas related to swallowing motion programming and performance was verified for auditory, visual and audiovisual stimuli related to swallowing motion. These results suggest that audiovisual stimuli related to swallowing motion could be applied to the treatment of patients with dysphagia.

著者

Yasutaka Nakamura Norio Kasahara Masatsugu Hashimoto

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

pp.2021-0035, (Released:2022-05-25)

参考文献数

15

被引用文献数

2

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Dentistry plays an important role in the identification of victims in large-scale disasters. The current poor status of and problems with victim identification work were highlighted in the aftermath of the Great East Japan Earthquake of March 11, 2011, in which some 10,000 people lost their lives. The techniques of dental identification therefore need to be improved if they are to cope with the problems associated with identification that will accompany the predicted Tokai earthquake and other unexpected large-scale disasters in the future. The purpose of this study was to determine the effectiveness of applying a digital impression-taking device employed in regular dental care to dental personal identification. The Trophy 3DI pro (Yoshida Dental) was applied to a total of 150 dental models. The diagnosis was accurate in 2,096 teeth from a sample of 2,100 comprising 1,240 non-treated teeth, 670 treated teeth, and 190 missing teeth, yielding a 99.8% level of statistical precision. These results suggest that the level of accuracy offered by this impression-taking device indicates that it would be a useful tool in establishing personal identification in disaster victims.

著者

TEIICHIRO AOYAGI KUNIHIRO HAYAKAWA KEISUKE MIYAJI HIROMICHI ISHIKAWA MAKOTO HATA

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.40, no.4, pp.215-217, 1999 (Released:2007-12-13)

参考文献数

6

被引用文献数

14 19

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A 53 year-old Japanese man was referred to our hospital for persistent priapism, which had been induced by 200mg (usual dose 25-50mg) of sildenafil citrate (Viagra™) three days earlier. He had a history of erectile dysfunction and had undergone penile injection therapy elsewhere; however, he had not used injection therapy this time. He obtained sildenafil personally without a doctor's prescription. He had not taken any other drugs that affect the metabolism of sildenafil, nor did he have any medical complications that might induce priapism. Since needle aspiration and irrigation were ineffective as first line therapy, surgical treatment was indicated to relieve the condition; a incision of tunica albuginea of both corpora cavernosa was made, and vigorous irrigation of saline washed out the blood clots. This is the first case report of priapism induced by sildenafil. Although this drug can be obtained through private commerce, it should be used under professional guidance as its abuse may lead to severe morbidity.

著者

Yasutaka Nakamura Mikayo Nakamura Norio Kasahara Masatsugu Hashimoto

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.61, no.3, pp.169-178, 2020 (Released:2020-09-04)

参考文献数

8

被引用文献数

1

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Victim identification following disasters is an important task for the dentist. Use of records of previous dental treatment proved effective in victim identification after the crash of Japan Airlines Flight 123 in 1985. This dental identification procedure can be problematic, however. In exceptional cases, the victim may have had very little or no prior treatment, making identification by this means impossible. The purpose of this study was to establish a new method of dental identification based on morphological comparison of the oral cavity, rather than on evidence of prior dental treatment. This new method involves superimposing 3-dimensional (3-D) models created by digital impression-taking devices, use of which is becoming increasingly widespread in present-day dental treatment. A total of 75 dental models were used to obtain 3-D models. These were then used in a total of 77 superimposition tests. The results demonstrated that the degree of similarity was 98.03-41.30%, and the degree of difference 0.17-29.69%. This indicated that differences among the dental models could be identified with 100% precision. Personal identification by superimposition of such 3-D models offers a useful tool that could compensate for the shortcomings of standard dental identification.

著者

Toshiyuki Handa Tatsuya Ichinohe

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

pp.2019-0017, (Released:2020-06-05)

参考文献数

8

被引用文献数

1

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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 first molars. Several tender points were found on the masseter, temporalis, and sternocleidomastoid muscles, with bilateral referred pain. The pain score according to the visual analogue scale was 85. No significant psychological factors were found, however. Based on these findings, the diagnosis was chronic myofascial pain with referred pain in the masticatory muscles. Therefore, stretching of masticatory muscle and trigger point injection were performed. Two months later, the patient requested trigger point injections to be performed at all tender points, as the previous injections had been effective. The total volume of local anesthetic that this would require was considered to be excessive as there was a large number of tender points, however, and it was feared that a toxic reaction might occur. Therefore, acupuncture in combination with trigger point injection was selected instead. The symptoms disappeared within 9 months after commencement of this therapy, and treatment was completed within 1 year. The present results suggest that acupuncture therapy is effective when used in combination with trigger point injection.

著者

Lopes Murilo Baena Consani Simonides Gonini-Júnior Alcides Moura Sandra Kiss McCabe John Francis

出版者

東京歯科大学

雑誌

The Bulletin of Tokyo Dental College

巻号頁・発行日

vol.50, no.3, pp.111-116, 2009

被引用文献数

10

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Microleakage in human and bovine teeth was compared. Cavities were prepared on the buccal surface in 20 human and 20 bovine teeth (3mm&times;2mm in depth). The teeth were divided into 4 groups (n=10) according to the substrate and adhesive (CLEARFIL SE Bond-CF or Scotchbond 1-SB1). Resin composite (Wave) was applied in two increments, each cured for 30 sec. Specimens were stored in 100% relative humidity at 37&deg;C for 24 hr and submitted to 1,000 thermal cycles, followed by immersion in 0.6% aqueous rhodamine for 48 hr. Specimens were rinsed and sectioned at the center. Microleakage length was measured and the score recorded using the following scale: 0-none, 1-up to enamel junction, 2-up to pulp wall, 3-in pulp wall, 4-beneath pulp wall. Percentage of leakage penetration into the cavity was submitted to an ANOVA and Tukey's test (5%) and the scores submitted to the Kruskal-Wallis and Dunn's multiple comparison tests (5%). When bovine teeth were used, SB1 (87.76%) showed a statistically higher penetration mean than CF (66.22%). When human teeth were used, no difference was found between SB1 (47.35%) and CF (36.01%). When scores were analyzed, SB1 showed no difference to CF. The differences found should be taken into consideration when evaluating adhesive microleakage using bovine teeth.

著者

Kitagawa Miki Kurahashi Tsukasa Matsukubo Takashi

出版者

東京歯科大学

雑誌

The Bulletin of Tokyo Dental College

巻号頁・発行日

vol.58, no.1, pp.1-8, 2017

被引用文献数

16

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<p>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). Approximately 40, 60, and 70% of men aged 40, 50, and 60 years, respectively, had a CPI score of ≥3. There were 10% fewer women than men at each age. Stepwise logistic regression revealed a BMI score of ≥30 kg/m²(OR, 1.44; 95% confidence interval [95%CI], 1.20–1.73); systolic blood pressure of ≥140 mmHg (OR, 1.09; 95%CI, 1.02–1.18); a fasting blood sugar level of ≥110 mg/dl (OR, 1.17; 95%CI, 1.04–1.30); high-density lipoprotein cholesterol level of <40 mg/dl (OR, 1.21; 95%CI, 1.06–1.37); smoker (OR, 1.59; 95%CI, 1.48–1.71); drinking ≥3 cups of Japanese <i>sake</i> per day (OR, 1.09; 95%CI, 1.05–1.14); use of salts for seasoning (OR, 1.17; 95%CI, 1.07–1.28); and fair and poor oral hygiene (OR, 2.27; 95%CI, 2.08–2.47) as significant risk factors for a CPI score of ≥3. These results suggest that smoking, oral hygiene status, and factors associated with metabolic syndrome are associated with periodontitis. This indicates that health guidance on tooth brushing, the importance of quitting smoking, and control of obesity may be effective in preventing the development of periodontal disease in adults.</p>

著者

YASUTOMO YAJIMA HIROYASU NOMA KIYOHIRO KASAHARA EIZO TAKEDA

出版者

東京歯科大学

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.41, no.4, pp.187-194, 2000 (Released:2007-02-01)

参考文献数

13

被引用文献数

4 4

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Systemic inflammatory response syndrome (SIRS) symptoms immediately after surgery have lately been regarded as potential warnings of impending postoperative complications and multiple organ failure. Reports discussing the relationship between operative stress and SIRS are found in the field of digestive surgery, but not in that of oral surgery. Forty oral cancer cases who had undergone neck dissection (Level III or higher) from January 1998 to June 1999 were involved in this study. We assigned 16 cases who met two of the several diagnostic criteria for SIRS and continued to meet them for at least 24 hours after surgery to the SIRS group. The other 24 patients were assigned to the non-SIRS group. Postoperative complications occurred in 56.3% of the SIRS group and 8.3% of the non-SIRS group (p<0.05). In two cases, the postoperative fluctuation of IL-6 level was evaluated. These results suggest the importance of careful management of postoperative SIRS patients to prevent complications.

著者

Mikio Ota Fumi Seshima Nobuki Okubo Takashi Kinumatsu Sachiyo Tomita Takeshi Okubo Atsushi Saito

出版者

Tokyo Dental College, Japan

雑誌

The Bulletin of Tokyo Dental College (ISSN:00408891)

巻号頁・発行日

vol.54, no.1, pp.51-57, 2013 (Released:2013-04-23)

参考文献数

22

被引用文献数

2 1

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As periodontal disease and diabetes mellitus (DM) have bidirectional interactions, an effective approach to periodontal treatment for patients with diabetes in the clinical setting is essential. This paper reports an effort in collaborative care for patients with periodontitis and diabetes between dental and medical professionals, and provides a preliminary evaluation regarding the clinical outcomes. We have introduced a clinical pathway program at our institution applicable to patients with periodontitis and DM. Physicians and dentists utilize the clinical pathway to share medical and dental information in order to provide the optimal care for each patient. So far, this clinical pathway has been applied to the treatment of 50 patients. We analyzed clinical outcomes in 10 patients with the chief complaint of periodontal problems who had also been diagnosed with type 2 DM. After initial periodontal therapy and diabetes care, a significant improvement in the mean value of glycated hemoglobin and fasting plasma glucose was observed, accompanied by clinical resolution of periodontal parameters. Within the limitations of the present study, the results suggest that collaborative care between periodontists and physicians based on the clinical pathway is effective in glycemic control of patients with periodontitis and type 2 DM. This indicates the need for closer collaboration between medical and dental professionals in improving the management of these diseases.