Korunovic Nikola, Marinkovic Dragan, Trajanovic Miroslav, Zehn Manfred, Mitkovic Milorad, Affatato Saverio
Faculty of Mechanical Engineering, University of Nis, 18000 Nis, Serbia.
Dept of Mechanics, Technical University of Berlin, 10623 Berlin, Germany.
Materials (Basel). 2019 Jul 22;12(14):2326. doi: 10.3390/ma12142326.
Structural analysis, based on the finite element method, and structural optimization, can help surgery planning or decrease the probability of fixator failure during bone healing. Structural optimization implies the creation of many finite element model instances, usually built using a computer-aided design (CAD) model of the bone-fixator assembly. The three most important features of such CAD models are: parameterization, robustness and bidirectional associativity with finite elements (FE) models. Their significance increases with the increase in the complexity of the modeled fixator. The aim of this study was to define an automated procedure for the configuration and placement of fixators used in the treatment of long bone fractures. Automated and robust positioning of the selfdynamisable internal fixator on the femur was achieved and sensitivity analysis of fixator stress on the change of major design parameters was performed. The application of the proposed methodology is considered to be beneficial in the preparation of CAD models for automated structural optimization procedures used in long bone fixation.
基于有限元方法的结构分析和结构优化，有助于手术规划或降低骨愈合过程中固定器失效的概率。结构优化意味着创建许多有限元模型实例，通常使用骨-固定器组件的计算机辅助设计（CAD）模型构建。此类CAD模型的三个最重要特征是：参数化、稳健性以及与有限元（FE）模型的双向关联性。随着所建模固定器复杂性的增加，它们的重要性也会提高。本研究的目的是定义一种用于配置和放置治疗长骨骨折所用固定器的自动化程序。实现了自驱动式内固定器在股骨上的自动化且稳健的定位，并对固定器应力随主要设计参数变化进行了敏感性分析。所提出方法的应用被认为有利于为长骨固定中使用的自动化结构优化程序准备CAD模型。
