【摘要】 采用3D－FEM分析天然牙─游离端叶状种植体联合支持的固定义齿在分散载荷下的应力和位移规律，结果发现：垂直向加载时，天然基牙最大位移小于种植体最大位移，但二者很接近；天然基牙的应力集中区位于颈部，根尖部牙周膜应力值较低；种植体远中拉颈部及相应区域皮质骨界面为高应力区；斜向加我时各结构应力值较垂直加我相比增大显著，应力分布情况也发生改变，两种基牙的最大位移值仍很接近，更多还原

【Abstract】 In this research, the 3 - D FE model of a blade and natural teeth - supported free end fixed partial denturewas constructed, and the stress,displacement under the dispersed loading were analysed.The results showedthat:Under the vertical loading, the maximal displacement of natural teeth is less than that of the implant. butthey are very close; there is a stress concentration area in the cervical part of the natural ahutments, the stressin the apical part is low,the stress of cortical bone arotind distal post is high; the stress of each stryetureis increased gready under the oblique loading, and the location of stress concentration is changed too, thediplacement difference between two kinds of abutments is still very small.更多还原