【摘要】 本文用牙体光弹性实验研究证实了牙颈部应力集中的客观存在,作者认为:牙颈部长期的应力集中,可能出现疲劳裂纹,如若伴随化学腐蚀的作用(如酸类),则可能加速疲劳裂纹的形成与发展,最终形成楔状缺损。更多还原

【Abstract】 The existence of stresses concentration in tooth neck was proved by the photoelastic experiment. The result suggested that the stresses concentration in tooth neck be possibly the cause of fatigue crackles in tooth neck. With the effect of chemical corrosiveness, the formation and development of fatigue crackles can be hastened, and then dental erosion can be formed.更多还原