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为了解义齿损坏的原因,研究固定桥负荷时的变形情况,利用传统的实验力学方法,灵敏度较低。干扰量度摄影是现代研究固定桥应力变形情况最有前途的方法之一,其优点是灵敏度高,负荷着力点的大小和性质符合固定桥的实际应用。作者以下颌固定桥做研究对象,3和7为桥基牙,654为桥体。干扰量度摄影用ЛГ—38型氦氖激光,波长0.633nm,用BP—Л型感光板,用双重曝光法拍摄固定桥负荷前、后的情况,
In order to understand the reason of the denture damage, the deformation of the fixed bridge is studied. The traditional experimental mechanics method is used to lower the sensitivity. Disturbance measurement photography is one of the most promising methods to study the stress and deformation of fixed bridges in modern times. The advantage of this method is its high sensitivity, and the size and nature of the load point are in line with the practical applications of fixed bridges. The author follows the mandibular fixed bridge as the research object, 3 and 7 for the bridge abutment, 654 for the bridge. Disturbance measurement photography using ЛГ-38-type He-Ne laser, wavelength 0.633nm, with BP-Л-type photosensitive plate, double exposure method taken fixed bridge load before and after the case,