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Occlusal Contacts and Function

咬合接触和功能

基本信息

批准号：
11470411
负责人：
MIURA Hiroyuki
金额：
$ 4.16万
依托单位：
Tokyo Medical and Dental University, Graduate School
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

During function, the tooth displacement path depends on occiusal contacts of the upper and lower teeth. Therefore, we must reconstruct occlusal relation carefully so as not to disturb physiological tooth displacement. In this investigation, tooth displacements were measured with the Displacement Transducer type M-3 in varying occlusal contact.The following conclusions were obtained.1. The location of occlusal contacts influenced the tooth displacement of the upper first molar. Especially, an occlusal contact on the lingual inclination of the lingual cusp, buccal cusp had great influence. The tooth showed displacement toward the buccal direction, and it differed from the physiological tooth displacement path during clencling at the intercuspal position.2. The location of occlusal contacts had little influence on the tooth displacement of the lower first molar. The tooth showed displacement toward the lingual direction. It was similar to the physiological tooth displacement.3. On the upper first molar, the location of occlusal force influenced the Stress-Strain curve. Especially, the occlusal force on the buccal cusp had great influence on the amount of tooth displacement.4. On the lower first molar, the location of occlusal force influenced the Stress-Strain curve. Especially, the occlusal force on the lingual cusp brought much displacement and a 2-phase displacement path, at times.Therefore, occlusal contacts have close relation to tooth displacement, and any occlusal reconstruction should harmonize with tooth displacement representing periodontal tissue distortion.

在功能过程中，牙齿的移位路径取决于上下牙的咬合接触。因此，我们必须仔细重建咬合关系，以免干扰牙齿的生理性移位。在本研究中，使用M-3型位移传感器测量了不同咬合接触状态下的牙齿位移。牙合接触位置对上颌第一磨牙的牙位移有影响。尤其是咬合接触对舌尖、颊尖舌向倾斜度的影响较大。结论：1.牙齿向颊向移动，与咬合牙尖错位时的生理移动路径不同。咬合接触位置对下颌第一磨牙牙位移量影响不大。牙齿向舌侧移位。这与生理性牙齿移位情况相似。在上颌第一磨牙上，咬合力的位置影响应力-应变曲线。尤其是颊尖牙合力对牙位移量的影响较大。在下颌第一磨牙上，咬合力的位置影响应力-应变曲线。尤其是舌尖上的咬合力有时会产生较大的位移和两相的位移路径，因此，咬合接触与牙齿移位密切相关，任何牙合重建都应与代表牙周组织变形的牙齿移位相协调。