Non-decorticated data.

Much is known about the biomechanical performance of various types of suture anchors commonly used for labral fixation in the shoulder; however, similar studies in the hip are less common. We sought to compare all-suture and polyether ether ketone small-diameter anchors in the setting of labral repair during hip arthroscopy, with and without acetabuloplasty. We hypothesized that the biomechanical properties of the all-suture group when compared to polyether ether ketone anchors would be similar amongst native acetabula and significantly less following acetabuloplasty and that pullout forces would be reduced in the anterior and inferior regions of the acetabulum compared to the superior region. Bone density was measured in nine matched pairs of fresh-frozen cadaveric acetabula in the superior, anterosuperior, and anterior regions. Acetabuloplasty was performed in all three regions, while the contralateral acetabulum was left in situ as a control. Suture anchors were placed such that one each of two different types was placed within each region. Specimens were tested in cyclic fatigue and loaded to failure. The all-suture group had significantly higher cyclic displacement compared to the polyether ether ketone, but there was no significant difference in ultimate load, regardless of acetabuloplasty. Amongst all non-resected specimens, the lowest bone density was observed consistently in the inferior region. Our results indicate that, with or without acetabuloplasty, a small-diameter polyether ether ketone anchor appears to be more stable than an all-suture anchor, which needs to be set first.

目前针对多种常用于肩关节盂唇固定的缝合锚钉（suture anchors）的生物力学性能，学界已有较为充分的研究，但髋关节领域的同类相关研究则相对匮乏。本研究旨在对比全缝线锚钉与聚醚醚酮（polyether ether ketone）小直径锚钉，在伴或不伴髋臼成形术（acetabuloplasty）的髋关节镜下盂唇修复术中的应用表现。我们提出如下研究假设：在完整髋臼标本中，全缝线锚钉组的生物力学性能与聚醚醚酮锚钉组相近；而经髋臼成形术后，全缝线锚钉组的生物力学性能将显著劣于聚醚醚酮锚钉组；此外，相较于髋臼上部区域，髋臼前区与下区的拔出力会有所降低。研究团队对9对匹配的新鲜冷冻尸体髋臼的上部、前上部及前区开展了骨密度测量。对三个区域均实施髋臼成形术，而对侧髋臼则保留原位作为对照。在每个区域内分别置入两种不同类型的锚钉各一枚。所有标本均依次接受疲劳循环加载测试，并最终加载至结构失效。测试结果显示，全缝线锚钉组的循环位移量显著高于聚醚醚酮锚钉组，但无论是否经过髋臼成形术，两组的极限载荷均无显著差异。在所有未行骨质切除的标本中，髋臼下区的骨密度始终处于最低水平。本研究结果表明，无论是否实施髋臼成形术，小直径聚醚醚酮锚钉的稳定性均优于全缝线锚钉，后者需先行置入固定。