Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes
Simulation of initial frontside and backside wear rates in a modular acetabular component with multiple screw holes
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DOI：
10.1016/s0021-9290(99)00043-3
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发表时间：
1999-09-01
影响因子：
2.4
通讯作者：
White, CV
中科院分区：
文献类型：
--
作者：
Kurtz, SM;Ochoa, JA;White, CV
采用基于滑动距离的有限元公式预测体外载荷条件下市售组配式聚乙烯部件前后表面的初始磨损率。我们发现接触面积、接触应力和后表面磨损对内衬/髋臼杯贴合性比多个螺孔更敏感。此外，背侧线性和体积磨损率至少比关节面的相应磨损估计值低三个数量级。这种差异主要归因于关节面（以mm为单位测量）与背面（以μ m为单位测量）的最大滑动距离差异。这是第一项使用为关节面建立的临床相关指标对背面磨损进行量化并与正面磨损进行明确比较的研究。本研究的结果表明，与背面不合格的影响相比，使用抛光金属髋臼杯时，螺钉孔的存在不会显著增加背面磨损。(C)1999 Elsevier Science Ltd.保留所有权利。
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 mu m). 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. (C) 1999 Elsevier Science Ltd. All rights reserved.