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Change in horizontal mandibular position after gothic arch tracing in edentulous patients

无牙颌患者哥特式牙弓追踪后下颌水平位置的变化

基本信息

批准号：
14571867
负责人：
ARAKAWA Ichiro
金额：
$ 2.11万
依托单位：
The Nippon Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571867/
关键词：
gothic arch tracing tapping movement maxillomandibular relation record 6-degrees of freedom tracking TMJ tomography condylar position 下顎運動記録

项目摘要

The purpose of this experiment was to investigate whether the practice of tracing gothic arch influence the condylar position in edentulous patient. Results were the following.Three healthy males in the twenties were selected. The anterior and bilateral border movement and the tapping movement of the mandible were recorded by mean of the K3DMS2 system with 6-degrees of freedom, and a program that can analyzed quantitatively the gothic arch and the tapping point was developed. The program was able to display the mandibular movement during gothic arch tracing, and at the same time the length of the anteriorly and bilaterally traced path, the border angle, the overlapping of tapping point over the gothic arch traced path, the average point of the ten tapping points, its positional coordinates, standard deviation, and coefficient of variation.For the six edentulous patients the anterior and bilateral border movement and the tapping movement of the mandible were recorded, and the bite was recorded at the apex of gothic arch (record A). Then the subjects were asked to trace gothic arch repeatedly till making clearly apex, and the bite was recorded (record B). The condylar positions for the record A and the record B were recorded using a tomography. The length of anterior and bilateral border movement for the record B was significantly longer than that for the record A. The maximal diameter of tapping points for the record B was significantly smaller than that for the record A. The condylar displacement index for the record B was significantly smaller than that for the record A.From these results it was suggested that the practice of tracing gothic arch brought about expansion of mandibular movement, stability of tapping movement, and improvement of condylar position in edentulous patient.

本实验旨在探讨无牙颌患者追踪哥特式弓的练习是否影响髁突的位置。结果如下：选择三名20岁左右的健康男性。利用K3DMS2六自由度测量系统记录下颌骨前缘、双侧缘运动和叩击运动，并编制了能定量分析哥特弓和叩击点的程序。该程序能够显示哥特式弓追踪过程中的下颌运动，同时显示前方和双侧追踪路径的长度、边界角、敲击点在哥特式弓追踪路径上的重叠、10个敲击点的平均点、其位置坐标、标准差、对6例无牙颌患者，记录下颌骨前缘、双侧缘运动和叩击运动，并在牙弓尖记录咬合（记录A）。然后要求受试者重复描记哥特式弓，直到清晰地描记尖部，并记录咬合（记录B）。使用断层扫描记录记录A和记录B的髁状突位置。记录B的前缘和双侧缘移动长度显著长于记录A。记录B的最大攻丝点直径显著小于记录A。记录B的髁突位移指数显著小于记录A。从这些结果可以看出，跟踪哥特式弓的实践带来了下颌运动的扩展，攻丝运动的稳定性，改善无牙颌患者的髁突位置。