Kinetically critical sites of femoral head roughening for wear rate acceleration in total hip arthroplasty
Kinetically critical sites of femoral head roughening for wear rate acceleration in total hip arthroplasty
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DOI：
10.1097/01.blo.0000150450.42829.b8
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发表时间：
2005-01-01
影响因子：
4.2
通讯作者：
Brown, TA
中科院分区：
文献类型：
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作者：
Lundberg, HJ;Stewart, KJ;Brown, TA
股骨头（刮擦）损伤引起的聚乙烯磨损加速是一种公认的危险，因为容易产生第三体碎片，但这种现象是模糊的，因此通常需要更直接和直接的考虑。为了帮助描绘相对面粗糙化和加速聚乙烯磨损之间有形的定量关系，经过实验验证的全髋关节置换磨损的滑动距离耦合有限元模型被调整以纳入局部股骨头粗糙化区域。该计算公式被系统地用于识别股骨头上的位置，对于这些位置，给定的局部粗糙化严重程度（根据粗糙化补片尺寸和摩擦磨损系数进行参数化）对于增加聚乙烯磨损而言最重要。两个这样的位点，名义上具有相当的动力学重要性，在各种粗糙化程度中始终很明显。这些关键部位位于头部矢状中线附近的准上方，一处稍靠前，一处稍靠后于冠状中线。
Polyethylene wear acceleration from (scratching) damage to the femoral head is a recognized hazard from constructs prone to generate third-body debris, but the phenomenon is nebulous and therefore often is subordinated to more direct and immediate considerations. To help delineate tangible quantitative relationships between counterface roughening and accelerated polyethylene wear, an experimentally validated sliding-distance-coupled finite element model of total hip replacement wear was adapted to incorporate regions of localized femoral head roughening. This computational formulation was used systematically to identify the sites on the femoral head for which a given severity of local roughening (parameterized in terms of roughening patch size and tribologic wear coefficient) was most consequential in terms of elevated polyethylene wear. Two such sites, of nominally comparable kinetic importance, were consistently evident throughout a wide range of roughening severities. These critical sites were located quasi-superiorly near the sagittal midline of the head, one slightly anterior and one slightly posterior of the coronal midline.