种植体-基桩界面结构的三维有限元应力分析  

Three dimensional finite element analysis of stress distribution of implant-abutment interfaces

作　　者：黄茜[1] 王聪[2] 王少安[3] 李苏伶[1] 

机构地区：[1]重庆医科大学附属口腔医院修复科,400015 [2]成都市第三人民医院口腔科,610031 [3]四川大学华西口腔医院,成都610041

出　　处：《重庆医学》2010年第8期947-948,I0002,共3页Chongqing medicine

摘　　要：目的研究连接方式对种植体-基桩界面受力的影响。方法利用三维有限元方法,分析比较Spline、外六边、内六边及莫氏锥度连接方式的种植体、基桩及中央螺钉在预负荷、垂直载荷200、500 N及斜向载荷100 N作用下的应力分布情况。结果中央螺钉的最大应力值位于螺钉头部与螺杆交接处;Spline种植体的最大应力值位于突起根部,该连接方式的中央螺钉的应力值高于种植体和基桩;侧向载荷使种植体-基桩连接各部件的应力明显增大。结论Spline连接方式的中央螺钉可以起到弱连接的作用;临床上应尽可能减小种植义齿受到的侧向力,以保证种植体-基桩界面的长期稳定性。Objective To investigate the effect of interface on stress distribution of implant-abutment joint. Methods Three-dimensional finite element analysis was used to determine stress distribution of the implant, abutment and screw of different interfaces under preload,200 N and 500 N vertical load,and 100 N oblique load. Results Maximum Von Mises stress of screw concentrated at the joint of the screw head and the screw shank. Maximum Von Mises stress of the Spline implant located at the root of the projections. Lateral load caused dramatically increase of the stress of the implant-abutment joint. Conclusion Central screw of the Spline system plays a role of weak link. It is recommened to diminish the lateral stress of the implant restoration in order to ensure the stability of the implanbabutment joint.

关 键 词：种植体 应力分析 接触分析 三维有限元 

分 类 号：R783.6[医药卫生—口腔医学]