关于创伤的计算机辅助光研究

Computer aided photocclusion analysis of traumatic occlusion

目的为了定量研究创伤，确定可以协助临床诊断咬合病人的客观指标及鉴别正常与创伤的依据。方法利用计算机图像处理技术，自行编制计算机软件程序及硬件系统用于光分析，可全面提取，分析咬合信息。结果可识别每个牙及全牙列的咬合接触区数目、面积、接触应力和接触力等定量指标，能准确、迅速地评价咬合的性质与状态。结论创伤有以下特点。①与正常比较，创伤有明显的异常接触区，该区的接触面积或接触力明显增大。②从牙列远—近中向分析，会有某项观察指标梯度颠倒的表现，违反由磨牙区向切牙区逐渐递减分布的规律。③牙弓两侧存在有严重的不协调、不对称现象。

Objective This study was designed to analyse traumatic occlusion quantitatively. Methods A photocclusion method using computer image processing technique is described, the processing software provide the occlusal contact area, contact point numbers, contact force, maximum stress, and average stress distribution of all teeth by tables and figures. Results (1)The traumatic contact area was larger and contact force was greater than that of the normal occlusal contact. (2) There was an irregularity force distribution from molars to incisal area. (3) The symmetrical distribution of contact forces and contact areas were destroyed. Conclusion Computer aided photocclusion method can be used to diagnose traumatic occlusion.