Dental Research Institute, Nanjing Medical University, Nanjing, China .
Int J Oral Sci. 2012 Jun;4(2):101-8. doi: 10.1038/ijos.2012.35.
The objective of this study was to investigate the mechanical characteristics of implant-abutment interface design in a dental , using nonlinear finite element analysis (FEA) method. This finite element simulation study was applied on three commonly used commercial dental implant systems: model I, the reduced-diameter 3i implant system (West Palm Beach, FL, USA) with a hex and a 12-point double internal hexagonal connection; model II, the Semados implant system (Bego, Bremen, Germany) with combination of a conical (450 taper) and internal hexagonal connection; and model III, the Brinemark implant system (Nobel Biocare, Gothenburg,Sweden) with external hexagonal connection. In simulation, a force of 170 N with 45" oblique to the longitudinal axis of the implant was loaded to the top surface of the abutment. It has been found from the strength and stiffness analysis that the 3i implant system has the lowest maximum von Mises stress, principal stress and displacement while the Br Bnemark implant system has the highest. It was concluded from our preliminary study using nonlinear FEA that the reduced-diameter 3i implant system with a hex and a 12-point double internal hexagonal connection had a better stress distribution, and produced a smaller displacement than the other two implant systems.
本研究旨在通过非线性有限元分析（FEA）方法研究牙科种植体-基台界面设计的力学特性。该有限元模拟研究应用于三种常用的商业牙科种植系统：模型 I，具有六方和十二点双内六角连接的减小直径 3i 种植系统（美国西棕榈滩，FL）；模型 II，Semados 种植系统（德国不来梅的 Bego），采用锥形（450 锥度）和内六角连接相结合的方式；模型 III，Brinemark 种植系统（瑞典哥德堡的 Nobel Biocare），采用外六角连接。在模拟中，将 170 N 的力以 45°的斜角加载到基台的顶部表面。通过强度和刚度分析发现，3i 种植系统的最大 von Mises 应力、主应力和位移最小，而 Brinemark 种植系统最大。我们通过非线性 FEA 的初步研究得出结论，具有六方和十二点双内六角连接的减小直径 3i 种植系统具有更好的应力分布，并且产生的位移比其他两种种植系统小。
