三种不同连接方式的天然牙—游离端种植体联合支持的固定义齿集中载荷应力分析

Three-dimensional finite element analysis of three different connectors used in fixed partial denture supported by the combination of an natural tooth and extensional implant—stress analysis under concentrated loading

目的 研究三种不同连接方式的天然牙———游离端种植体联合支持的固定义齿在集中载荷下的应力值和应力分布。方法 应用三维有限元应力分析法。结果 ①固定连接式固定义齿的种植体基牙应力峰值高于天然牙 ;②刚性栓道式固定义齿的种植体基牙应力峰值最高 ;③缓冲式固定义齿的种植体基牙应力峰值最低。结论 ①固定连接式固定义齿设计可能损伤种植体基牙 ,需采取适当措施 ;②刚性栓道式固定义齿设计对种植体基牙损伤最大 ;

Objective To analyze the stress value and the stress distribution under concentrated loading for three different connectors used in the fixed partial denture supported by the combination of an natural tooth and extensional implant.Methods Three-dimensional finite element stress analysis method was used.Results ①The maximal stress value of the implant abutment was higher than the maximal stress value of the nature tooth for the rigid connector of fixed partial denture;②When we used rigid attachments.The maximal stress value of the implant abutment was the highest;③When resilient attachment was used the maximal stress value of the implant abutment was the lowest.Conclusion ①Rigid connector of fixed partial denture may damage the implant abutments and the protect measurement must be taken;②Rigid attachment of fixed partial denture destructs the implant abutment mostly;③Resiliant attachment design is the protection function for the implant abutments.