覆盖义齿在临床广泛应用以来,业已证明该种修复方法具有以下优点:可以减少与延缓牙槽骨的吸收;增进义齿的固位与稳定;同时还不同程度的保留了牙周膜的本体感受力。目前,对覆盖义齿的研究已转而注视如何延长其使用时间。据报告龋病与牙周病而致基牙脱落是影响延长覆盖义齿使用的主要原因。为此,我们于1983年对1979年前 Since the widespread application of overdenture in clinical practice, it has been proved that this method of repair has the following advantages: it can reduce and delay the absorption of alveolar bone; enhance the retention and stability of the denture; meanwhile, it also retains the body sensation of periodontal ligament to varying degrees . At present, research on overdenture has turned to how to extend its use of time. It is reported that dental caries and periodontal disease caused by abutment loss is the main reason affecting prolonged use of overdenture. For this reason, we were in 1983 to 1979