仿生种植牙模型的三维有限元研究论文.doc

仿生种植牙模型的三维有限元研究论文.doc仿生种植牙模型的三维有限元研究论文
王宗篪, 庄国铭, 谢培庆, 赖森财
【关键词】牙种植;牙周膜;牙模型;有限元分析;牙应力
摘要: 目的研究仿生种植牙、天然牙和骨性结合种植体3种模型骨界面上的应力分布,从理论上探讨种植体的新模型。方法应用螺旋CT对上颌中切牙标本进行扫描,分别建立仿生种植牙、天然牙和骨性结合种植体模型,对3个模型施加同样的载荷,应用Super , natural tooth and osseointegrated implant, and to study the neodel of the implant in theory. Methods The shape data of the central maxillary incisor are obtained by helixCT, then the threedimensional finite element models of the bionic implant, natural tooth and osseointegrated implant can be set up, distribution of the natural periodontal membrane, bionic periodontal membrane and the bone interface of the three models are calculated out by SuperSAP93, e load exerted to the three models. Results The stress change of the inside and outside surface of the natural periodontal membrane and bionic periodontal membrane is in the same tendency. The stress concentration appears in the cervix of the osseointegrated maximum Von Mises stress plant and the natural tooth changes evenly from their cervix to their roots, the stress concentration doesn't appear in the cervix. Conclusion The bionic periodontal membrane has the same function as the natural periodontal membrane. It has the dispersing and cushioning action against stress, and it make the stress of the bone interface of the bionic implant distribute evenly.
KEY ATOM Sensation 4,德国Seimens公司)对标本进