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首页> 外文期刊>The Journal of oral implantology >Optimization of the Conical Angle Design in Conical Implant-Abutment Connections: A Pilot Study Based on the Finite Element Method
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Optimization of the Conical Angle Design in Conical Implant-Abutment Connections: A Pilot Study Based on the Finite Element Method

机译：锥形植入基台连接中锥形角度设计的优化：基于有限元方法的试验研究

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Conical implant-abutment connections are popular for their excellent connection stability, which is attributable to frictional resistance in the connection. However, conical angles, the inherent design parameter of conical connections, exert opposing effects on 2 influencing factors of the connection stability: frictional resistance and abutment rigidity. This pilot study employed an optimization approach through the finite element method to obtain an optimal conical angle for the highest connection stability in an Ankylos-based conical connection system. A nonlinear 3-dimensional finite element parametric model was developed according to the geometry of the Ankylos system (conical half angle = 5.7 degrees) by using the ANSYS 11.0 software. Optimization algorithms were conducted to obtain the optimal conical half angle and achieve the minimal value of maximum von Mises stress in the abutment, which represents the highest connection stability. The optimal conical half angle obtained was 10.1 degrees. Compared with the original design (5.7 degrees), the optimal design demonstrated an increased rigidity of abutment (36.4%) and implant (25.5%), a decreased microgap at the implant-abutment interface (62.3%), a decreased contact pressure (37.9%) with a more uniform stress distribution in the connection, and a decreased stress in the cortical bone (4.5%). In conclusion, the methodology of design optimization to determine the optimal conical angle of the Ankylos-based system is feasible. Because of the heterogeneity of different systems, more studies should be conducted to define the optimal conical angle in various conical connection designs.
机译：锥形种植体 - 基台连接是它们的优异连接稳定性，可归因于连接中的摩擦阻力。然而，锥形角度，锥形连接的固有设计参数，对连接稳定性的2个影响因素产生相反的影响：摩擦阻力和邻接刚度。该试点研究采用了优化方法，通过有限元方法获得了基于Ankylos的锥形连接系统中最高连接稳定性的最佳圆锥角度。通过使用ANSYS 11.0软件，根据ansys系统（锥形半角= 5.7度）的几何形状开发非线性三维有限元参数模型。进行优化算法以获得最佳圆锥半角，并在邻接中实现最大值误判压力的最小值，这代表了最高的连接稳定性。获得的最佳圆锥半角为10.1度。与原始设计（5.7度）相比，最佳设计表现出刚性刚性增加（36.4％）和植入物（25.5％），植入邻接界面下降（62.3％），接触压力降低（37.9 ％）在连接中具有更均匀的应力分布，并且皮质骨中的应力降低（4.5％）。总之，设计优化的方法论，以确定基于ankylos的系统的最佳圆锥的最佳锥形是可行的。由于不同系统的异质性，应进行更多的研究以在各种锥形连接设计中定义最佳锥形角度。

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