不良刷牙方法，唾液酸性环境的作用，牙颈部结构薄弱，咬合应力集中共同致牙颈部实质缺损。
结果老年牙齿楔状缺损好发于第一双尖牙，且楔缺损害以盘型、2度更为常见；
Results Wedge-shaped defects in the first premolar were commonly seen in elderly patients, moreover, the disc wedge and type 2 degrees were more common in the lack of damage.
目的研究牙颈部楔状缺损与牙齿咬合接触的关系。
Objective To investigate the relationship between tooth occlusive contact in the laterotrusion and wedge-shaped defects.
楔状缺损这样的人，谁吃轻冷，热，酸，甜的食物可能会导致严重的甚至牙齿疼痛，可引起牙髓炎，使你不安牙痛。
Wedge-shaped defects such people, who eat light cold, hot, sour, sweet foods can cause tooth pain, in serious cases can cause pulpitis, so that you get restless toothache.
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