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Study on arrising factors of TM disorders and food habits -Survey on the Central American Indian, whose origin are the same as Japanese-

TM障碍发生因素及饮食习惯研究-与日本同源的中美洲印第安人调查-

基本信息

批准号：
10041193
负责人：
OHNISHI Masatoshi
金额：
$ 4.16万
依托单位：
YAMANASHI MEDICAL UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

The present study consists of two objectives: an epidemiological study of the incidence of temporomandibular symptoms(TMS) and an investigation to clarify the relationship between the dental attrition and morphological change of condyle using dried cranial bone samples.In order to conduct the survey, we selected a population consisting mainly of the native inhabitants of Honduras and Guatemala in Central America, who have the same radical roots as the Japanese and whose living environment, especially eating habits, are different from those of Japanese. As for the latter investigation, we collected data on native indians in Central America.Results: The ranking of incidence of TMS, from lowest to highest, was a Honduran native indians, living in the mountain[31.7%(20/63)], Guatemalan native indian[42.1% (43/02)], a Honduran native Indian on the Coasu of the Caribbean Sea[46.8%(74/58)] and the citizens of Tegucigalpa, the capital of Honduras[50.0%(26/52)].Attrition Broca(B)was used to evalvate the degree to attrition and all patients with TMS were classified as either class 1 or class 2.Regarding the relationship between dental attrition and the morphological change of mandibular condyle, the B1-B3 mild attrition group was classified as convex type, while the B2-B4 group was classified as fiat type. The present study demonstrated that the number of cases of fiat type increased as attrition progressed from a mild to severe degree.Discussion: The results obtained in this study suggested that the patients with TMS were in a state of poor adaptability character; zed by mild attrition and slight remodeling of the mandibular condyle.

本研究包括两个目标：本研究选择中美洲洪都拉斯和危地马拉的土著居民为研究对象，对颞下颌关节症状（TMS）的发生率进行了流行病学调查，并利用干燥的颅骨标本对牙齿磨损与髁突形态变化的关系进行了研究。他们与日本人有着相同的激进根源，他们的生活环境，特别是饮食习惯，与日本人不同。至于后一项调查，我们收集了中美洲土著印第安人的数据。TMS发病率从低到高依次为：居住在山区的危地马拉土著印第安人[31.7%（20/63）]，危地马拉土著印第安人[42.1%（43/02）]，加勒比海科阿苏的印第安土著居民[46.8%（74/58）]和特古西加尔帕的公民，洪都拉斯首都[50.0%（26/52）]. Atelia Broca（B）根据牙体磨耗程度的不同分为1级和2级。关于牙体磨耗与下颌骨形态变化的关系，髁状突，B1-B3轻度磨耗组为凸面型，B2-B4轻度磨耗组为平面型。本研究表明，随着磨损程度由轻到重，扁平型的病例数增加。讨论：本研究结果表明，TMS患者处于一种适应性差的状态，由轻度磨损和轻微的髁状突重塑。