电子散斑干涉技术在口腔修复力学效果测量中应用

An Application of ESPI on Prosthodontics

介绍口腔修复领域中的一种新的变形检测技术电子散斑干涉技术。选用新鲜人尸离体颌骨，制备左下颌第一恒磨牙缺失模型，用双端固定桥修复。应用该技术测试基牙及其支持骨组织的变形，并作为固定桥设计方案选择的根据。本试验实时记录了静载荷下牙槽骨的离面变形条纹图，并经微机图象处理系统处理，实验结果证明，该技术可以全场、非接触、无损伤的实时显示物体离面位移，为口腔生物力学的基础研究提供了更接近真实的实验手段。

Electronic Speckle Pattern Interferometry(ESPI) was introduced to analyze the deformation of the alveolar bone on which the twoends bridge of prosthodontics was fixed. Four kinds of vertical loads applied to the abutment teeth were considered. Realtime deformation fringes of the bone was obtained by ESPI and recorded by video camera. After microcomputer image processing the corresponding outofplane displacements of the bone was measured. The experiments showed that this noncontact, nondestructive technique may serve as a useful tool for the design of denture structures.