临床上引起牙槽凹陷的原因有:(1)拔除唇侧牙槽骨已丧失的牙齿,(2)拔除患有牙周病或尖周病伴有进行性骨吸收的牙齿,(3)发育不良。在修复术中,曾通过改变固定义齿和活动义齿的设计试图补偿凹陷的牙槽嵴。如固定义齿可采用改变桥体高度和厚度的办法来解决上述问题。然而,其结果可能贮藏食物, The causes of alveolar recession clinically include: (1) removal of labial alveolar bone lost teeth, (2) removal of teeth suffering from periodontal disease or periapical disease with progressive bone resorption, (3) development bad. In the repair procedure, attempts have been made to compensate for the recessed alveolar ridge by changing the design of the fixed denture and the movable denture. Such as fixed denture can be used to change the bridge height and thickness of the way to solve the above problems. However, the result may be stored food,