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昭和60年における冠・架工義歯補綴に関する統計的観察 その2 架工義歯について
Get PDFapplication/pdfA study was made of 260 bridges which were fabricated for patients at the Prosthodontic Clinic of Matsumoto Dental College during 1985. Some of the results were as follows: 1) 46.02% of the patients were males and 53.98% were females. 2) 86.94% of the patients were between 20 and 59 years old. 3) 64.62% of the bridges were fabricated as 3-unit bridges; 4) 82.31% were fabricated as 1-pontic bridges. 5) There were fewer bridge retainers for the lower anterior segment than for other segments. 6) 49.84% of bridges retainers were fabricated as full cast crowns. 7) 47.77% were fabricated for vital teeth. 8) Of pontics, 30.70% were replaced for the lower molar segment. 9) Compared with a similar study in 1984, the number of bridges decreased by 91.journal articl
舌炎と頸動脈瘤を伴った第3期梅毒の1例
Get PDFapplication/pdfAlthough the oral lesions of acquired syphilis were described as long ago as the year 1900, more recent interest in the oral manifestations of this disease had waned with the rarity of these lesions. With the spectacular development of various antibiotics, tertiary syphilis is rarely seen in modern clinics of oral and maxillofacial surgery. A case of tertiary syphilis found at the tip of the tongue and the carotid of a 55-year-old man is presented. The swelling at the tip of the tongue revealed a 10×40mm lesion, which was hard and firm with burning and aching. Extraoral examination revealed freely movable nodes in the left submaxillary area. There were no cervical nodes palpable, bat the carotid body revealed enlargement, which was soft and without pain. Biopsy was performed on the oral lesion, revealing granulomatous inflammation. Treponemal serologic tests showed lues, and the two symptoms stated above were thought to be affected with lues. Luic aneurysm are discussed regarding the frequency and the mechanism of formation.journal articl
骨格性下顎前突症の外科的矯正手術における低血圧麻酔の検討
Get PDFapplication/pdfThis study examines the effects of induced hypotension anesthesia with intravenous administration of nitrogycerin by means of micro-infusion technique in 16 patients undergoing sagittal split mandibular ramus osteotomy for prognathism. The hypotension level of 80 mmHg in systolic arterial pressure was achieved and maintained during the osteotomy of both mandibular sides. The following effects were observed. 1. Both surgical and anesthetic duration decreased markedly. The average duration of surgical procedure was shortened from 6 hours and one minute at control group to 3 hours and 4 minuten at hypotensive group, and the anesthetic duration reduced from 7 hours and 16 minutes to 4 hours and 19 minutes. 2. The average of blood loss during surgey fell from 1224. 6ml to 329. 1ml. 3. Blood transfusion was not necessary for any of the hypotensive group. 4. Postoperative complication due to the induced hypotention was not encountered. These rusults suggest that the marked decrease of bleeding during the surgical procedure owed to the both reduction of operative time and improvement of surgical technique, added to the useful effects of controlled hypotension anesthesia.journal articl
ヒドロキシアパタイトおよびアルミナ溶射インプラント周囲組織についての組織学的観察
Get PDFapplication/pdfMetal implants such as cobalt-chromiun alloy or titanium have been used as materials of endossesous dental implants. These metal implants are surrounded by connective tissue in the alveolar bone. Recently, a variety of biocompatible ceramic implants have been apllied to endossesous implants in the expectation of tighter bonding. Hydroxyapatite ceramic implants are anchored to the bone without the exsistence of the connective tissue. The brittle characteristic of hydroxyapatite ceramics, however, makes it difficult to shape the blade-type implant which offers a wide area of contact with the bone. A blade-type implant of titanium coated by hydroxyapatite, designed by M. Ito and K. Suzuki in 1981, overcame this difficulty. Preliminary experiments showed that the hydroxyapatite coated implant could be tightly anchored to the mandibular bone of test monkeys. In the present study, more detailed architecture of the tissue-implant interface was observed by light microscopy and compared implants coated with various mixtures of almina. In addition, the calcified appearance of the surrounding bone was investigated by microradiography and X-ray microanalysis. The results were as follows: 1) In the case of a pure aluminina-coated implant, the ingrown bone as well as thin fibrous connective tissues surrounded the implant within 6 months after insertion. 2) In the case where a pure hydroxyapatite coated implant was inserted for 6 months, the trabecular bone grew close to, or in contact with the coated surface of the implant. After 12 months, the implant was connected directly to the remodeled bone, without any soft tissues. 3) By increasing of mixture percentage of hydroxyapatite, fibrous connective tissue between the implant and the bone, which was marked in a pure alumina-coated implant, became thinner. The result of 80% hydroxyapatite - 20% alumina coating seemed to be satisfactory, considering the necessity of alumina to increae the strength of the coating. 4) The calcified appearance of the bone surrounding the implants was shown by means of contour mapping using an X ray analyzer. More abundant calcium was observed in the ingrown bone in the case of pure hydroxyapatite-coating implant than those of pure alumina coating. In case of 80% hydroxyapatite -20% alumina coating, the distribution of calcium in the addiotional bone near the implant was the same as those of pure hydroxyapatite after 6 months. Later, the distribution of calcium became dense and there was no remarkable difference between the newly formed bone and the existing bone after12 months.journal articl
ホルマリン・グアヤコールを根管消毒剤として使用した臨床成績について 第3報 最終報告
Get PDFapplication/pdfIn 1888 cases (1031 patients) of pulpectomy and infected root canals treated by dentistsor intern students, Formarin-Guaiacol "NEO" (FG) was used as a disinfectant in the root canals until the root canal filling was completed. The results obtained were as follows: 1. Unfavolable symptoms happened in 3 (0.3%) out of 783 pulpectomy cases. 2. 19 (1.7%) out of 1150 asymptomatic chronic apical periodontitis cases resulted in exacerbation of periodentitis. 3. It was recognized that Formalin-Guaiacol kept in clinic, was less subject to a change in quality than formocresol. 4. It was concluded that Formalin-Guaiacol could be used safely as a disinfectant for intracanal medication in endodonticallv treated teeth.journal articl
Endocaterの臨床使用経験について 第2報 抜髓ならびに感染根管治療への応用
Get PDFapplication/pdfTooth length has been commonly measured in the clinic by the radiographic or electronic method. This study was done to determine whether Endocater (EC), a new electronic device for determining the length of tooth, was useful in cases of extirpation of vital pulp and infected root canal treatment clinically. A Root Canal Meter (R. C. M.) that had been usually used in our clinic, was utilized as a control. The results obtained were as follows : 1. For extirpation cases of vital pulp, R. C. M. could determine the lengths of teeth in all of 42 cases, but EC could not determine 15 of 42 cases (35.7%). On the other hand, at the first appointment for infected root canal treatment, EC could not measure the lengths of teeth in 3 of 32 cases (9.4%). The teeth lengths of the failure cases could be determined at the next appointment. 2. The teeth lengths determined by EC were from 0.5 to 1.0mm shorter than those measured by R. C. M. in most cases.journal articl
Oral Examination of Students of Matsumoto Dental College, School of Hygiene (Department of Dental Hygienists, Department of Dental Technicians)
Get PDFapplication/pdfThe oral condition was examined in students of Matsumoto Dental College, School of Hygiene, and the following results were obtained. 1) A questionnaire about the dietary and brushing habits suggested a better oralhygienic condition in the sophomores than freshmen of the Hygienist Department, and the 1-year education on dental hygiene appeared to be effective. Also, the students of the Hygienist Department were considered to have higher degree of knowledge on dental hygiene than those of the Technician Department. 2) The results of caries activity tests (Cariostat and RD TEST) were consistent with the findings of the questionnaire.journal articl