A study on occlusal contact phase and the onset of the temporomandibular joint in para-functional mandibular movements

下颌功能异常运动中咬合接触相和颞下颌关节起始的研究

• 批准号: 04671204
• 负责人: TANAKA Kiyoo
• 金额: $ 1.15万
• 依托单位: Aichi-Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04671204/
• 关键词: temporomandibular joint disorders; para-functional mandibular movement; occlusal contact; lateral excursion; protrusive excursion; 前方滑走運動; 咬合接触状態

This study was to investigate the relationship between the onset of temporomandibular joint (TMJ) disorders and functional and para-functional mandibular movements, and their occlusal contacts on the location.Noraml subjects were selected to examine the time for the onset of TMJ disorders, while maintaining their mandibular in functional and para-functional positions, and at the same time, we measured occlusal contacts on the location and it's area.1. In lateral excursions, the distance from intercuspal position (IP) to the right canine edge-to-edge position (R2) was 3.9(〕SY.+-.〔)1.4 mm, and IP to the left canine edge-to-edge position (L2) was 3.7(〕SY.+-.〔)1.6 mm. The distance from IP to the right limit lateral excursive position (R4) was 10.1(〕SY.+-.〔)0.7 mm, and IP to the limit lateral left position (L4) as 10.5(〕SY.+-.〔)1.0 mm. In protrusive excursions, IP to the incisal edge-to-edge position (P2) was 3.2(〕SY.+-.〔)1.1 mm, and IP to limit protrusive position (P4) was 7.4(〕SY.+-.〔)0.5 mm.2. The total number of occlusal contact points were as follows ; IP : 26.6(〕SY.+-.〔)8.9, P1 - P4 : 4.8(〕SY.+-.〔)4.2 - 2.4(〕SY.+-.〔)1.1, R1 - R4 : 8.2(〕SY.+-.〔)3.9 - 2.6(〕SY.+-.〔)2.1, L1 - L4 : 6.6(〕SY.+-.〔)4.6 - 1.0(〕SY.+-.〔)0.1.3. The total amount of occlusal contact areas were as follows ; IP : 16.2(〕SY.+-.〔)9.0 mm^2, Pl - P4 : 2.4(〕SY.+-.〔)2.4 mm^2 - 1.2(〕SY.+-.〔)0.7 mm^2, R1 - R4 : 6.1 (〕SY.+-.〔)3.1 mm^2 - 1.9(〕SY.+-.〔)1.8 mm^2, L1 - L4 : 4.7(〕SY.+-.〔)3.7 mm^2 - 0.3(〕SY.+-.〔)0.2 mm^2.No subject had TMJ disorders in the intercuspal position, but some subjects complained of TMJ disorders when the distance of lateral and protrusive movements were increased. Especially, over tooth edge-to-edge in lateral and protrusive mandibular position, more than 80% of the subjects complained of TMJ disorders.It seems there were some relationships between the onset of TMJ disorders and para-functional mandibular movements and their occlusal contact phase.

本研究旨在探讨功能性和非功能性下颌关节运动与TMJ紊乱发病的关系，并对正常受试者在保持下颌功能性和非功能性下颌关节紊乱的同时，对下颌关节紊乱的发病时间进行测量，同时测量下颌关节紊乱的部位和面积。在侧移中，尖牙间隙位置(IP)至右尖牙边缘至边缘位置(R2)的距离为3.9±1.4 mm，IP至左侧尖牙边缘至边缘位置(L2)的距离为3.7±1.6 mm。IP至右外偏位(R4)的距离为10.1±0.7 mm，IP至L4的距离为10.5±1.0 mm。在前移中，切缘到边缘位置(P2)的IP为3.2(±1.1)mm，限制前突位置(P4)的IP为7.4(±0.5)mm。牙合接触点总数如下；IP：26.6()sy.+-.()8.9，P1-P4：4.8()sy.+-.()4.2-2.4()sy.+-.()1.1，R1-R4：8.2()sy.+-.()3.9-2.6()sy.+-.()2.1，L1-L4：6.6()sy.+-.()4.6-1.0()sy.+-.()0.1.3牙合接触面积总和如下；IP：16.2()sy.+-.()9.0 mm^2，Pl-P4：2.4()sy.+-.()2.4 mm^2-1.2()sy.+-.()0.7 mm^2，R1-R4：6.1()sy.+-.()3.1 mm^2-1.9()sy.+-.()1.8 mm^2，L1-L4：4.7(Sy.+-.)3.7 mm^2-0.3(Sy.+-.()0.2 mm^2)。牙尖间位无TMJ障碍，但随着侧向和前伸距离的增加，部分受试者出现TMJ障碍。尤其是在侧位和前伸位时，超过80%的受试者以TMJ紊乱为主诉，TMJ紊乱的发生似乎与下颌的非功能性运动和咬合接触时相有关。