云纹干涉法测量不同载荷条件下金属-瓷标本的位移

背景：云纹干涉法是现代光力学测试技术，是实验力学范畴。另外，金瓷修复体以其较好的生物相容性，色泽美观，坚固而广泛应用于临床，将云纹干涉技术应用口腔领域得到医学工程中所需位移量，体现学科交叉，较好的实现学科互补。目的：详细介绍了云纹干涉法原理以及试件栅的复制，针对临床经常发现口腔中瓷剥落等破坏行为，应用云纹干涉法来研究金瓷复合材料受力后的位移量。方法：采用云纹干涉技术测试金瓷试件在不同载荷下的水平和竖直位移情况，该方法灵敏度高，操作简便，适用于面内位移测量，位移量以条纹形式显示。结果和结论：该方法能够获得到口腔材料代表面内位移的干涉图，得到不同载荷作用下试件变形量。云纹干涉法能够被用来测试金瓷修复体的位移，操作简便，结果以干涉条纹显示。

Application of moiré interferometry method in measurement of displacement of metal-porcelain restorations

BACKGROUND:Moiré interferometry method which belongs to the range of experiment mechanics is a modern photo-mechanics test technique. On the other hand, metal-porcelain restorations characterized as beautiful, compatible and stable properties are widely used in oral medicine domain. Moiré interferometry technique is applied in the oral restoration and some mechanics data can be obtained. It can be realized in discipline complementation and interaction between mechanics and bio-medicine engineering.OBJECTIVE:To introduce the moiré interferometry technique in details, and to study the displacement of metal-porcelain restorations under different loads by using the moiré interferometry technique as it is found that porcelains often flake off from the base of restorations in oral clinic.METHODS:The horizontal and vertical displacement of metal-porcelain restorations were measured by using the moiré interferometry method which is sensitive and easy to operate, and suitable for in-plane displacement measurement. The displacement was shown in the form of interferometry patterns.RESULTS and CONCLUSION:The interferometry patterns which represented the in-plane displacement of specimens were obtained and the displacement was linearly related with the loading changes. Moiré interferometry method can be used in measuring the displacement of restorations. Operation is simple and results are shown by interferometry patterns.