Joint Epidemiological Survey of Temporomandibular Joint Diseases in Honduras Central America

为了阐明颞下颌关节病的发病与咀嚼方式之间的关系，我们对洪都拉斯人和Xicaque人进行了比较调查，他们是洪都拉斯原住民，与日本人有相同的根源。方法与材料：调查对象包括颞下颌关节的发生频率、饮食习惯、牙磨损和下颌髁的形态变化。从1994年到1995年的两年里，研究对象是60名西卡克人和249名其他洪都拉斯人。其中，来自31名西卡克人的60个颞下颌关节，来自123名其他洪都拉斯人的203个关节，以及来自27名伦夸人的52个关节通过关节造影进行了研究。结果：在饮食习惯方面，80.5%的西克人和73.9%的其他洪都拉斯人更喜欢软食，这两个数字大致相同。54.5%的西克人和29.4%的其他洪都拉斯人患有颞下颌关节病，22.7%的西克人和4.2%的其他洪都拉斯人不习惯刷牙，差异相当大。在牙齿磨损方面，布罗卡的I、II和III分类比例为：西卡的5:7:3，伦夸的5:4:4，其他洪都拉斯人的3:8:2。此外，通过对美国史密森博物馆和美国密歇根大学收藏的172个美洲印第安人颅骨/颌骨的颞下颌关节进行初步研究，结果表明，随着Broca分类从I到II再到III，下颌髁形态从圆形到凸形、扁平到超扁平的变化越多。通过x射线发现，与其他洪都拉斯人和日本人相比，Xicaque人的骨骼系统，包括颞下颌关节，并不发达。髁状突的重塑趋向于小。

In order to clarify the relationship between onset of temporomandibular arthrosis and masticatory pattern, we conducted a comparative investigation of Hondurans and Xicaque, who are aboriginal Hondurans and have the same roots as Japanese.1. Methods and materials : Items investigated were frequency of temporomandibular arthrosis, dietary habits, dental attrition and morphological changes in the mandibular condyle. Subjects studied over two years from 1994 to 1995 were 60 Xicaque and 249 other Hondurans. Among them, 60 temporomandibular joints from the 31 Xicaque, 203 from 123 other Hondurans and 52 from 27 Lenqua were referred to via roentogenography.2. Results : In terms of dietary habits, 80.5% of Xicaque and 73.9% of other Hondurans prefer soft food, with these figures being roughly the same. 54.5% of the Xicaque and 29.4% of other Hondurans suffer temporomandibulararthrosis, and 22.7% of Xicaque and 4.2% of other Hondurans do not habitually brush their teeth, a considerable difference. In terms of dental attrition, Broca's classification I, II and III ratio were 5 : 7 : 3 for Xicaque, 5 : 4 : 4 for Lenqua and 3 : 8 : 2 for other Hondurans.In addition, based on preliminary research of 172 temporomandibular joints from American Indian skull/jaw bones owned by smithonian Museum, U.S.A., and the University of Michigan, results were obtained that as the Broca's classification advanced from I to II to III, the more the mandibular condyle morphology changed from round to convex to flat to ultraflat.The skeletal system, including the temporomandibular joint, of the Xicaque was found through X-rays to be not welldeveloped, compared to that of other Hondurans and Japanese. Remodeling of the condyle tended to be small.