Femoroacetabular impingement impingement causes osteoarthritis of the hip by migration and micro-instability of the femoral head

被引:14
作者
Eijer, Henk [1 ]
Hogervorst, Tom [2 ]
机构
[1] Spital Emmental, Dept Orthopaed Surg, Burgdorf, Switzerland
[2] Bergman Clin, Dept Orthopaed Surg, Rijswijk, Netherlands
关键词
SHAPE; ARTHRITIS; DEFORMITY; PATTERNS; COHORT;
D O I
10.1016/j.mehy.2017.05.035
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Femoroacetabular impingement is the condition whereby parts of the proximal femur mechanically collide with the acetabular rim leading to adjacent and contrecoup acetabular damage. Evidence is growing that at least for cam impingement, and perhaps less so for pincer impingement, there is a relation to the development of osteoarthritis. It has been demonstrated that surgery for impingement can improve function and decrease pain. Intuitively, it would then make sense that surgical intervention would prevent further degeneration. However, available literature to date cannot assure that it does. Therefore, the impingement itself seems not a sufficient cause to consistently cause osteoarthritis. For many years we have observed a phenomenon whereby the femoral head 'migrates' anteriorly and superiorly in the acetabulum in patients with cam impingement. The same, but less constant, can be observed in pincer impingement, where the head may migrate posteriorly and medially. Migration of the femoral head is known in the literature and seen as caused by, or as part of, osteoarthritis of the hip. We suggest that the migration is caused by the impingement, and that the femoral head wanders into the impingement-related area with cartilage damage. In cam impingement this may be anterolateral, in pincer impingement posteromedial. The effect must be a huge increase in compression forces, especially in cam impingement. The migration may even lead to, or be a sign of, micro-instability of the femoral head in the acetabulum, which may produce an increase in shear forces. We therefore hypothesise that impingement may lead to osteoarthritis by means of migration and the possible existence of micro-instability of the femoral head. Detecting and quantifying these phenomena seem of uttermost importance and may add a new dimension to conservative hip surgery. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:93 / 96
页数:4
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