随着人类寿命的延长,多数老年人口腔内有不同程度的牙龈萎缩,牙根外露,根面龋及楔状缺损形成残根残冠,造成牙列缺损或缺失。再有不同程度的心脑血管疾病,给口腔治疗带来很多困难,因此,利用残根残冠进行固定修复以利于恢复老年人的牙齿功能和牙列完整,对老年人可以保留进行固定修复的 With the extension of human life expectancy, the majority of elderly people with varying degrees of oral gingival recession, root exposure, root caries and wedge-shaped defect residual root residual crown formation, resulting in dentition defect or missing. There are different degrees of cardiovascular and cerebrovascular diseases, oral treatment to bring a lot of difficulties, therefore, the use of residual roots and crown for fixed restoration in order to facilitate the restoration of elderly patients with dental function and dentition integrity, the elderly can be retained for fixed repair