【摘要】 采用三维有限元的方法，分析种植体数目对全下领种植覆盖义齿及其支持组织在受载下应力分布的影响。结果发现增加种植体数目可以降低种植体、骨界面及义齿的应力峰值，并减小基托下组织的受力，从而减少剩余牙糟嵴的吸收。因此增加种值体的数目有利于应力的分散和对剩余牙槽嵴的保护。更多还原

【Abstract】 The biomechanical compatibility of the implant den ture is one of the most important factors affecting its longterm success. The purpose of this study is to investigate the influence of implant numbers on stress distribution of the complete overdenture and its supporting structures under centric occlusion. The 3D-FE medel of the edentulous mandible, implants and the denture was established, and the results demonstrated that the most extreme principle stresses of implant and interface locate around the neck, the increase of the implant amount led to a decrease of the extreme principle stress of the implant, interface, alveolar ridge surface and the denture.更多还原