论文部分内容阅读
目的:分析平台转换种植体周围的力学分布特点。方法:利用CATIA画图软件,建立种植体支持的上颌第一前磨牙三维模型,分析垂直向和斜向加载条件下平齐对接(PM)和平台转换(PS)种植体周围的应力分布差异;比较不同材料基台平台转换冠修复后种植体周围的应力分布差异。结果:①PS型种植体在垂直加载和斜向加载时种植体周围骨组织内最大von Mises应力值均较PM型小。②不同材料基台种植体周围应力分布云图相似,应力均集中在种植体颈部。结论:①PS种植体周围骨组织最大应力值较PM种植体小,但基台、中央螺丝、种植体的应力增大。②斜向加载较垂直向加载种植体周围应力值大大增加,特别是基台及种植体部位较为明显。③基台材料对种植体周围应力值无明显影响。
OBJECTIVE: To analyze the mechanical distribution around the implants for platform conversion. Methods: The three-dimensional model of implant supported maxillary first premolar was established by using CATIA drawing software to analyze the difference of stress distribution around flush implant (PM) and platform transfer (PS) implant under vertical and oblique loading conditions. Differences in stress distribution around implants after the conversion of the crown on the platform. Results: ① The maximum von Mises stress in the bone tissue around the implants of PS implants was smaller than that of PM implants under vertical loading and oblique loading. ② The distribution of stress distribution around the implants on different abutments is similar, stress is concentrated on the neck of implant. Conclusions: ① The maximum stress of bone tissue around PS implants is smaller than that of PM implants, but the stress of abutments, central screws and implants are increased. (2) Compared with the vertical loading, the loading stress in the oblique loading greatly increased, especially in the abutment and implant sites. ③ abutment material on the stress around the implant had no significant effect.