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首页> 外文期刊>Journal of Biomechanics >Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes.
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Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes.

机译：模拟具有多个螺孔的模块化髋臼组件的初始正面和背面磨损率。

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摘要

A sliding distance-based finite element formulation was implemented to predict initial wear rates at the front and back surfaces of a commercially available modular polyethylene component during in vitro loading conditions. We found that contact area, contact stress, and wear at the back surface were more sensitive to the liner/shell conformity than the presence of multiple screw holes. Furthermore, backside linear and volumetric wear rates were at least three orders of magnitude less than respective wear estimates at the articulating surface. This discrepancy was primarily attributed to the difference in maximum sliding distances at the articulating surfaces (measured in mm) versus the back surface (measured in microm). This is the first study in which backside wear has been quantified and explicitly compared with frontside wear using clinically relevant metrics established for the articulating surface. The results of this study suggest that with a polished metal shell, the presence of screw holes does not substantially increase abrasive backside wear when compared with the effects of backside nonconformity.
机译：实施了基于滑动距离的有限元公式，以预测在体外加载条件下市售模块化聚乙烯组件正面和背面的初始磨损率。我们发现，与多个螺孔相比，接触面积，接触应力和后表面的磨损对内衬/外壳的一致性更敏感。此外，背面的线性和体积磨损率比铰接表面处的相应磨损估计值至少小三个数量级。这种差异主要归因于在铰接表面（以毫米为单位）与背面（以微米为单位）之间最大滑动距离的差异。这是第一项研究，其中量化了背面磨损并使用针对关节表面建立的临床相关指标将其与正面磨损进行了比较。这项研究的结果表明，与背面不合格的影响相比，使用抛光的金属外壳时，螺孔的存在不会显着增加背面的磨料磨损。

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