The aim of this study was to assess injury patterns and risk factors of the acetabular labrum and associated cartilage in patients with femoroacetabular impingement (FAI) versus dysplasia. We retrospectively reviewed 137 patients diagnosed with labral tears and FAI or dysplasia (74 or 63 cases, respectively) through an arthroscopic procedure. Labral and concomitant cartilage injuries were evaluated. Demographics and radiological variables [lateral center-edge angle (LCEA), anterior center-edge angle, acetabular index (AI), acetabular version and alpha angle] were evaluated as risk factors for labral and cartilage injuries. Detachment of acetabular cartilage with intact labro-cartilaginous junction was the most common in dysplasia, whereas cartilage delamination from the labro-cartilaginous junction was more common in FAI (P < 0.001). A higher body mass index was significantly associated with delamination injury in FAI (odds ratio 1.226; 95% CI 1.043–1.441; P = 0.013). A significant correlation was evident between detachment injury and a larger AI in dysplasia (odds ratio 1.127; 95% CI 1.000–1.270; P = 0.049). In addition, symptom duration was positively correlated with the extent of labral tearing in FAI (P = 0.013), whereas the smaller LCEA was correlated with the larger extent of labral tearing in dysplasia (P = 0.044). FAI and dysplasia patients exhibited different labral and cartilage injury patterns. Increased body mass index was correlated with delamination injury in FAI, whereas an increased AI was associated with detachment injury in dysplasia. Greater tearing was associated with a longer symptom duration in FAI, and a decreased LCEA was a risk factor for the extent of tearing in dysplasia. Level of evidence Level III. Case–control study.

中文翻译：

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股骨髋臼撞击和发育不良的盂唇撕裂和软骨损伤模式不同

本研究的目的是评估股骨髋臼撞击 (FAI) 与发育不良患者的髋臼盂唇和相关软骨的损伤模式和危险因素。我们回顾性分析了通过关节镜手术诊断为盂唇撕裂和 FAI 或发育异常的 137 例患者（分别为 74 例或 63 例）。评估了盂唇和伴随的软骨损伤。人口统计学和放射学变量 [横向中心边缘角 (LCEA)、前中心边缘角、髋臼指数 (AI)、髋臼版本和 α 角] 被评估为盂唇和软骨损伤的危险因素。髋臼软骨脱离与完整的实验室软骨连接是发育不良中最常见的，而来自实验室软骨连接的软骨分层在 FAI 中更常见（P < 0.001）。较高的体重指数与 FAI 的分层损伤显着相关（优势比 1.226；95% CI 1.043–1.441；P = 0.013）。脱离损伤与发育不良中较大的 AI 之间存在显着相关性（优势比 1.127；95% CI 1.000-1.270；P = 0.049）。此外，症状持续时间与 FAI 中的盂唇撕裂程度呈正相关（P = 0.013），而较小的 LCEA 与发育不良中较大的盂唇撕裂程度相关（P = 0.044）。FAI 和发育不良患者表现出不同的盂唇和软骨损伤模式。体重指数增加与 FAI 中的分层损伤相关，而 AI 增加与发育不良中的脱离损伤相关。更大的撕裂与 FAI 中更长的症状持续时间有关，并且 LCEA 降低是发育不良撕裂程度的危险因素。证据级别 III 级。病例对照研究。