【摘要】 目的 研究刃状螺纹型支抗种植体的螺纹顶角改变对骨界面应力分布的影响,以供临床筛选合适的支抗种植体。方法 用三维有限元方法给种植体施加150g近远中方向的载荷,分别对螺纹顶角为60°、75°、120°的三种支抗种植体-骨界面进行应力分析。结果 三种螺纹顶角种植体颈部的Von-Mises应力值分别为0.533 0 MPa、0.632 0 Mpa、0.591 0 Mpa;位移值分别为0.1630μm、0.1590μm、0.1520μm。结论 螺纹顶角为60°的种植体适合作正畸支抗体。更多还原

【Abstract】 Objective To investigate the effects of different implant screw angle on stress distribution in implant-bone inter-face, providing the appropriate shape for orthodontic anchorage. Methods The stress and strain in implant-bone interface for im-plants with different screw angle(60°, 75°, 120°), which was 150 grams loaded mesiodistally, were analyzed by 3-dimesion finiteelement analysis method. Results The Von-mises stress at cervices of these three implant screw angles was 0. 533 0 MPa, 0. 6320 MPa and 0. 591 0 MPa respectively. The alveolar bone deformation at the cervix of implants were 0. 163 0 μm, 0. 159 0 μm and0. 152 0 μm respectively. Conclusion The implant with 60°screw angle was suitable for orthodontic anchorage.更多还原