除龋病外,老年患者因多数牙不适就诊最常见的病因是楔状缺损和牙齿磨损。牙齿磨损是牙体增龄性变化的显著特征,是指主要由于机械摩擦作用造成的牙体硬组织渐进性丧失。是在正常咀嚼过程中,随年龄的增长,牙齿咬合面和邻面由于咀嚼作用而发生的硬组织丧失。楔状缺损是指牙齿的牙颈部硬组织在某些因素的长期作用下逐渐丧失,形成由2个斜面组成的楔形缺损,以前磨牙最为多见[1]。老年患者常见好发于多个牙面,邻近数个牙齿,缺损程度不同,有时范围甚 In addition to dental caries, the most common causes of tooth discomfort in elderly patients are wedge-shaped defects and tooth wear. Tooth wear is a significant feature of the age-related changes in the teeth, refers to the main cause of mechanical friction caused by progressive loss of hard tissue. Is the loss of hard tissue that occurs as a result of chewing on the occlusal surfaces and adjacent surfaces of the teeth during normal mastication with age. Wedge-shaped defect refers to the tooth’s neck hard tissue under the long-term effect of some factors, the gradual loss of the formation of two bevel wedge-shaped defect, the most common premolar [1]. Elderly patients often occur in multiple teeth, adjacent to a few teeth, the degree of defect is different, and sometimes range