种植义齿在行使咬合功能时,受到的咬合力经由种植体上部结构传递至种植体,再进入周围骨组织,然后分散入颌骨内。颌骨组织有对轴向力负荷能力强,对侧向力、剪切力和张力承受极限低的特点[1]。咬合运动中产生的侧向力、剪切力会在种植体-骨界面产生应力集中,使种植体与骨界面有相对位移的 The occlusal force received by implant denture during occlusal exercise is transmitted to the implant via the superstructure of the implant and into the surrounding bone tissue, which is then dispersed into the jawbone. Jawbone has the ability to load axial force, lateral force, shear stress and tension to withstand low limit [1]. Lateral and shear forces generated during occlusal movement can result in stress concentrations at the implant-bone interface, displacing the implant from the bone interface