平衡与非平衡咬合对种植全口义齿应力状况的影响  

Stress analysis of mandibular complete dentures supported by implants with various occlusions

作　　者：张少锋[1] 曾余庚[2] 马轩祥[1] 

机构地区：[1]第四军医大学口腔医学院修复科,陕西西安710033 [2]西安电子科技大学机电工程学院电子机械系,陕西西安710071

出　　处：《第四军医大学学报》2006年第14期1290-1292,共3页Journal of the Fourth Military Medical University

基　　金：国家自然科学基金项目(39600165)

摘　　要：目的:研究咬合平衡与否对种植全口义齿应力状况的影响.方法:建立种植全口固定义齿和种植全口覆盖义齿的三维有限元模型,然后进行侧方咬合平衡与不平衡、前伸咬合平衡与不平衡模拟加载分析.结果:种植全口固定义齿侧方咬合平衡与否,其骨界面和基托应力变化不大,但前伸咬合平衡者较不平衡者骨界面和基托应力显著降低;种植全口覆盖义齿侧方和前伸咬合平衡者均较不平衡者骨界面应力明显降低.结论:种植全口固定义齿侧方咬合平衡可不做为临床要求,而其前伸咬合平衡以及种植全口覆盖义齿侧方和前伸咬合平衡应做为临床常规设计.AIM： To investigate the stress status of mandibular complete dentures supported by implants with various balanced or unbalanced occlusion. METHODS： A 3-D finite element model of mandibular complete dentures supported by implants was established to analyze the stress status with protrusive or lateral occlusions. RESULTS： To the osseointegrated implant-supported fixed prosthesis, the stresses of implant-bone interface and denture base in protrusive balanced occlusion were lower than those in protrusive unbalanced occlusion, but no distinct different between balanced and unbalanced lateral occlusions. To the osseointegrated implant-supported overdenture, its stresses in protrusive and lateral balanced occlusions were lower than those in their unbalanced ones. CONCLUSION： A balanced occlusal scheme should pay attention to the implant-supported overdenture, also to the implant-supported fixed prosthesis in protrusive occlusion, but not to the implant-supported fixed prosthesis in lateral occlusion.

关 键 词：有限元分析 牙种植体 义齿 全口 咬合 牙应力分析 

分 类 号：R783.5[医药卫生—口腔医学]