Relationship between Maxillofacial Morphology and Mandibular Function

颌面部形态与下颌功能的关系

基本信息

批准号：
02454455
负责人：
YAMAGUCHI Yoshinori
金额：
$ 4.1万
依托单位：
Shiga University of Medical Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

A balanced biomechanical relationship between the masticatory muscles, jaws,temporomandibular joints(TMJs),and teeth is necessary to achieve normal function. The purpose of this study was to determine if maxillofacial morphology in patients with existing mandibular dysfunction result in the TMJ dysfunction and pain.(1)Cephalometric Norms in Japanese Adults: There was greater skeletal facial convexity than in white American. The Maxilla in Japanese was positioned slightly anteriorly,and the chin posteriorly. Additionally, upper and lower lip protorution were greater than white american. There was a smaller nasolabial angle in Japanese than in white american.(2)Relationship between maxillofacial morphology and temporomandibular joint dysfunction(TMD): Asymmetry faces showed higher incidence of dysfunction as well as percentage of composition of various dysfunctions. Though there was not statistically significant between the type of maocclusion and TMD, most of TMD had functional occlusal interdelferences. From these findings , the occlusion of TMJ dysfunction group was characterized to be in the restricted interpospal condition, which might relate to the TMJ dysfunction.(3)Condylar position in the glenoid fossa: Evaluation of the TMJs of control group and TMD patients corrected by IVRO was made with corrected laminograms. The results showed that the dramatic change in the patient's symptoms and dysfunction concern with the condylar position in the glenoid fossa. The clinical effect of altering the disk-condyle position and / or condylar position was difficult to analyze critically without TMJ imaging or axiografic study. Obviously, further cumulative study is necessary. The investigator wishes to developdel this study in future.

咀嚼肌、颌骨、颞下颌关节 (TMJ) 和牙齿之间平衡的生物力学关系对于实现正常功能是必要的。本研究的目的是确定现有下颌功能障碍患者的颌面部形态是否会导致颞下颌关节功能障碍和疼痛。(1)日本成年人的头影测量标准：与美国白人相比，面部骨骼凸度更大。日本人的上颌骨稍微靠前，下巴靠后。此外，上唇和下唇的突出程度也高于美国白人。日本人的鼻唇角较美国白人小。(2)颌面部形态与颞下颌关节功能障碍(TMD)的关系：不对称的面孔表现出较高的功能障碍发生率以及各种功能障碍的构成比例。虽然咬合类型与TMD之间没有统计学意义，但大多数TMD都存在功能性咬合干涉。从这些结果来看，TMJ功能障碍组的咬合特征是处于受限的间质状态，这可能与TMJ功能障碍有关。（3）髁突在关节盂窝中的位置：对对照组和TMD患者的TMJ进行校正的评估IVRO 是用校正的层析图制作的。结果表明，患者症状和功能障碍的剧烈变化与关节窝髁突位置有关。如果没有 TMJ 成像或轴位图研究，很难严格分析改变椎间盘髁位置和/或髁位置的临床效果。显然，还需要进一步的积累研究。研究者希望将来开展这项研究。