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首页> 外文期刊>Journal of orthopaedic research >Tensile properties of the human acetabular labrum-the first report.
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Tensile properties of the human acetabular labrum-the first report.

机译：人类髋臼唇的拉伸特性-第一份报告。

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The tensile properties of the human acetabular labrum were investigated using a uniaxial tension testing apparatus. The superior quadrant of the acetabular labrum was harvested from patients who underwent hip surgery. The obtained labra were sliced and shaped into rectangles for measuring uniaxial tension. We hypothesized that several characteristics such as gender, age, degeneration due to primary ailment, and the severity of the acetabular dysplasia would influence the tensile properties of the labrum. Antero-posterior radiographs of the pelvis have been used to evaluate the severity of the acetabular dysplasia and to diagnose the developmental dysplasia of the hip joint (DDH) clinically. Thus, we investigated the correlation between each of two representative radiological measurements-the CE angle and the Sharp angle-and tensile properties to assess the influence of the severity of the acetabular dysplasia. The tensile stress-strain curves for the labrum assumed a sigmoid shape. The mean tensile stress at failure for all specimens was 8.8+/-4.1 MPa. The mean strain at failure for all specimens was 48.5+/-10.4%. The mean tensile modulus was 66.4+/-42.2 MPa. Mean tensile stress at failure for specimens from males was greater than that of specimens from females. A significant difference was found in the maximum stress at failure among the three diagnosis-based groups: the other group withstood the highest stress before failure, whereas the osteoarthritis (OA) group withstood the lowest. No significant correlations with age or radiological characteristics were found for tensile stress, strain at failure, or tensile modulus. Our results suggest that labra obtained from male patients have stronger tensile stress than those from female patients, and that degenerative changes may influence the properties of the acetabular labrum.
机译：使用单轴拉伸测试仪研究了人类髋臼唇的拉伸特性。髋臼唇上象限是从接受过髋关节手术的患者中收获的。将获得的拉布拉切片并切成矩形，以测量单轴张力。我们假设几种特征，例如性别，年龄，因原发疾病引起的退化以及髋臼发育不良的严重程度会影响唇唇的拉伸特性。骨盆的前后骨片已用于评估髋臼发育不良的严重程度，并在临床上诊断髋关节发育不良（DDH）。因此，我们调查了两个代表性放射学测量值（CE角和夏普角）之间的相关性，并评估了拉伸特性以评估髋臼发育不良严重程度的影响。唇骨的拉伸应力-应变曲线呈S形。所有样品在破坏时的平均拉伸应力为8.8 +/- 4.1 MPa。所有样品的平均破坏应变为48.5 +/- 10.4％。平均拉伸模量为66.4 +/- 42.2MPa。雄性标本破坏时的平均拉伸应力大于雌性标本。在三个基于诊断的组中，最大的衰竭压力存在显着差异：另一组在失效前承受的压力最高，而骨关节炎（OA）组的承受的应力最低。拉伸应力，破坏应变或拉伸模量与年龄或放射学特征无显着相关性。我们的结果表明，男性患者获得的拉布拉比女性患者具有更大的拉应力，并且退行性改变可能会影响髋臼唇的性质。

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