Balik Ali, Karatas Meltem Ozdemir, Keskin Haluk
Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
J Oral Implantol. 2012 Sep;38 Spec No:491-6. doi: 10.1563/AAID-JOI-D-10-00127. Epub 2011 May 16.
The stability of the bone-implant interface is required for the long-term favorable clinical outcome of implant-supported prosthetic rehabilitation. The implant failures that occur after the functional loading are mainly related to biomechanical factors. Micro movements and vibrations due to occlusal forces can lead to mechanical complications such as loosening of the screw and fractures of the abutment or implants. The aim of this study was to investigate the strain distributions in the connection areas of different implant-abutment connection systems under similar loading conditions. Five different implant-abutment connection designs from 5 different manufacturers were evaluated in this study. The investigation was performed with software using the finite element method. The geometrical modeling of the implant systems was done with CATIA virtual design software. The MSC NASTRAN solver and PATRAN postprocessing program were used to perform the linear static solution. According to the analysis, the implant-abutment connection system with external hexagonal connection showed the highest strain values, and the internal hexagonal implant-abutment connection system showed the lowest strain values. Conical + internal hexagonal and screw-in implant abutment connection interface is more successful than other systems in cases with increased vertical dimension, particularly in the posterior region.
种植体支持的修复体长期良好的临床效果需要骨-种植体界面的稳定性。功能加载后发生的种植体失败主要与生物力学因素有关。咬合力引起的微运动和振动会导致机械并发症，如螺钉松动、基台或种植体骨折。本研究的目的是在相似加载条件下，研究不同种植体-基台连接系统连接区域的应变分布。本研究评估了来自5个不同制造商的5种不同的种植体-基台连接设计。使用有限元方法通过软件进行研究。种植体系统的几何建模使用CATIA虚拟设计软件完成。使用MSC NASTRAN求解器和PATRAN后处理程序进行线性静力求解。根据分析，外六角连接的种植体-基台连接系统显示出最高的应变值，而内六角种植体-基台连接系统显示出最低的应变值。在垂直尺寸增加的情况下，特别是在后牙区域，锥形+内六角和旋入式种植体基台连接界面比其他系统更成功。
