At present the domestic investigations concerned the occlusion of middle-aged and elder mainly include tooth missing 、 tooth abrasion 、 occlusal trauma and so on but the studies on the occlusal support are also rare either in domestic or foreign .

目前国内有关中老年人咬合状态的调查研究，主要集中在牙齿缺失情况、牙齿磨耗、咬合 创伤等方面， 专门 描述 咬合支持 状态的研究报道还较少见。

PURPOSE to analyze the reasons of the occlusal disorder after posterior teeth lost trauma and serious wearing teeth to observe the masticatory efficiency and the clinical changes of temporomandibular disorders ( TMD ) after occlusal reconstruction using fixed prosthesis .

目的 临床分析咬合失调患者的病因，采用固定修复术重建 咬合， 测定 治疗前后的咀嚼效能及观察颞下颌关节紊乱病的临床变化。