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首页> 外文期刊>Journal of prosthodontics: official journal of the American College of Prosthodontists >Influence of cusp inclination on stress distribution in implant-supported prostheses. A three-dimensional finite element analysis.
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Influence of cusp inclination on stress distribution in implant-supported prostheses. A three-dimensional finite element analysis.

机译：牙尖倾斜度对植入物支撑的假体中应力分布的影响。三维有限元分析。

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摘要

PURPOSE: The aim of this study was to assess the influence of cusp inclination on stress distribution in implant-supported prostheses by 3D finite element method. MATERIALS AND METHODS: Three-dimensional models were created to simulate a mandibular bone section with an implant (3.75 mm diameter x 10 mm length) and crown by means of a 3D scanner and 3D CAD software. A screw-retained single crown was simulated using three cusp inclinations (10 degrees, 20 degrees, 30 degrees). The 3D models (model 10d, model 20d, and model 30d) were transferred to the finite element program NeiNastran 9.0 to generate a mesh and perform the stress analysis. An oblique load of 200 N was applied on the internal vestibular face of the metal ceramic crown. RESULTS: The results were visualized by means of von Mises stress maps. Maximum stress concentration was located at the point of application. The implant showed higher stress values in model 30d (160.68 MPa). Cortical bone showed higher stress values in model 10d (28.23 MPa). CONCLUSION: Stresses on the implant and implant/abutment interface increased with increasing cusp inclination, and stresses on the cortical bone decreased with increasing cusp inclination.
机译：目的：本研究的目的是通过3D有限元方法评估尖牙倾角对植入物支撑的假体应力分布的影响。材料与方法：通过3D扫描仪和3D CAD软件，创建三维模型来模拟带有植入物（直径3.75毫米x长度10毫米）和冠的下颌骨部分。使用三个尖点倾斜度（10度，20度，30度）模拟了螺钉固定的单冠。将3D模型（模型10d，模型20d和模型30d）转移到有限元程序NeiNastran 9.0中，以生成网格并执行应力分析。在金属陶瓷冠的前庭内部表面上施加200 N的倾斜载荷。结果：通过von Mises应力图将结果可视化。最大应力集中位于应用点。在30d模型中，植入物显示出更高的应力值（160.68 MPa）。皮质骨在模型10d中显示出较高的应力值（28.23 MPa）。结论：随着牙尖倾斜度的增加，植入物和植入物/基台界面的应力增加，而随着牙尖倾斜度的增加，对皮质骨的应力减少。

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