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一、前言 固定桥行使功能时所产生的咀嚼力,是通过桥基牙的牙周膜传递到牙槽骨、颌骨上来承担的。研究桥基牙及其支持组织的受力状况,对于固定桥的合理设计,维护基牙健康及修复体的预后都是非常重要的。因此很多学者通过各种手段进行了这方面的研究。近年来,大多数学者应用各种应力分析方法对牙体、牙周支持组织,以及义齿本身等的受力状况进行了研究。光测应力方法是当前应用较多的实验应力分析方法之一。 光测应力分析方法,自50年代尤其70年代以来,已在口腔医学领域有较多的应用。
I. INTRODUCTION The chewing force produced by the function of fixed bridges is transmitted to the alveolar bone and jawbone through the periodontal ligament of bridge abutment. Studying the abutment teeth and the supporting tissues of them is very important for the rational design of the fixed bridge, the maintenance of abutment health and the prognosis of the prosthesis. Therefore, many scholars carried out this kind of research through various means. In recent years, most scholars use various stress analysis methods to study the stress state of tooth body, periodontal support tissues and denture itself. Optical stress measurement method is one of the most widely used experimental stress analysis methods. Optical stress analysis method, since the 1950s, especially since the 70s, has more applications in the field of stomatology.