Non-linear 3D Evaluation of Different Oral Implant-Abutment Connections
Non-linear 3D Evaluation of Different Oral Implant-Abutment Connections
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DOI：
10.1177/0022034512463396
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发表时间：
2012-12-01
影响因子：
7.6
通讯作者：
Flach, M.
中科院分区：
文献类型：
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作者：
Streckbein, P.;Streckbein, R. G.;Flach, M.
种植体-基牙连接中的微间隙和骨质过载是种植体周围骨吸收和种植失败的最常见原因。这些不受欢迎的事件可以在标准化的三维有限元模型上通过射线照相方法可视化。本研究观察了7种不同种植基牙连接方式的种植体系统(ankylos、Astra、Bego、BrAyennemark、Camlog、Struann和XIVe)在体外对骨超载和微间隙形成的影响。种植体的各个几何形状被转移到三维有限元模型中。在非线性分析中，考虑了咬合螺丝的预加载、种植体与基牙之间的摩擦、锥角对骨应变的影响以及微间隙的出现。增加的骨应变与较小的(<；15度)锥角相关。锥形种植体-基牙连接有效地避免了微小间隙，但对种植体周围骨应变有负面影响。具有较大壁厚(Ankylos)或较小锥角(Bego)的植入物可降低骨应变。我们的硅胶研究结果为减少种植体周围骨应变和种植体-基牙连接中的微小间隙以提高长期稳定性提供了坚实的基础。
Micro-gaps and osseous overload in the implant-abutment connection are the most common causes of peri-implant bone resorption and implant failure. These undesirable events can be visualized on standardized three-dimensional finite element models and by radiographic methods. The present study investigated the influence of 7 available implant systems (Ankylos, Astra, Bego, BrAyennemark, Camlog, Straumann, and Xive) with different implant-abutment connections on bone overload and the appearance of micro-gaps in vitro. The individual geometries of the implants were transferred to three-dimensional finite element models. In a non-linear analysis considering the pre-loading of the occlusion screw, friction between the implant and abutment, the influence of the cone angle on bone strain, and the appearance of micro-gaps were determined. Increased bone strains were correlated with small (< 15 degrees) cone angles. Conical implant-abutment connections efficiently avoided micro-gaps but had a negative effect on peri-implant bone strain. Bone strain was reduced in implants with greater wall thickness (Ankylos) or a smaller cone angle (Bego). The results of our in silico study provide a solid basis for the reduction of peri-implant bone strain and micro-gaps in the implant-abutment connection to improve long-term stability.