American Hip Institute, Westmont, Illinois, USA.
University of Chicago Pritzker School of Medicine, Chicago, Illinois, USA.
Orthop J Sports Med. 2015 Feb 24;3(2):2325967115572573. doi: 10.1177/2325967115572573. eCollection 2015 Feb.
Hip dysplasia has been shown to be a cause of early arthritis. The decrease in bony coverage has shown increased stress on the acetabular labrum as it shares an increased load.
PURPOSE/HYPOTHESIS: The purpose of this study was to divide a cohort of patients by radiographic measures of dysplastic and nondysplastic hips for comparison with regard to labral size at 4 anatomic locations. The hypothesis was that dysplastic hips will have significantly larger labral size compared with nondysplastic hips.
Cross-sectional study; Level of evidence, 3.
A prospective study was conducted at a single institution. A total of 130 patients underwent hip arthroscopy during the study period from September 2011 to February 2012. Intraoperatively, arthroscopic measurements were taken at 4 quadrants on the acetabular clockface: anterosuperior (12-3 o'clock), anteroinferior (3-6 o'clock), posterosuperior (9-12 o'clock), and posteroinferior (6-9 o'clock). Three radiographic parameters for dysplasia were used to substratify the study population base: lateral center-edge angle (LCEA) ≤25° and LCEA >25°, acetabular inclination (AI) ≤10° and AI >10°, and anterior center-edge angle (ACEA) ≤20° and ACEA >20°.
For the LCEA ≤25° group, there were 28 hips with mean LCEA of 20.96° ± 3.40°. Patients with LCEA ≤25° had larger labral width in all 4 quadrants (P < .05). For AI >10°, there were 12 hips with the mean AI 12.92° ± 2.50°. Patients with AI >10° had larger labral size in the posteroinferior quadrant only (P < .05). For ACEA ≤20°, there were 4 hips with a mean ACEA of 11.25° ± 5.19°. The anteroinferior and posteroinferior quadrants had a significant increase in labral size when substratified by ACEA ≤20° (P < .05).
Labral size was significantly larger in dysplastic hips compared with nondysplastic hips. The posteroinferior quadrant labrum was larger in size in dysplastic hips, as measured by any of the 3 radiographic measurements of dysplasia. Hips with LCEA ≤25° had larger labra in all 4 quadrants.
髋关节发育不良已被证明是导致早期关节炎的原因之一。由于髋臼唇承受的负荷增加，其骨覆盖面积的减少导致了更大的压力。
目的/假设：本研究的目的是通过髋关节发育不良和非发育不良髋关节的放射学测量指标，对 4 个解剖部位的髋臼唇大小进行分组比较。假设发育不良的髋关节的髋臼唇会明显大于非发育不良的髋关节。
横断面研究；证据水平，3 级。
在一家医疗机构进行了一项前瞻性研究。在 2011 年 9 月至 2012 年 2 月期间，共有 130 名患者接受了髋关节镜检查。术中在髋臼钟面的 4 个象限进行关节镜测量：前上（12-3 点）、前下（3-6 点）、后上（9-12 点）和后下（6-9 点）。使用 3 个髋关节发育不良的放射学参数对研究人群进行分层：外侧中心边缘角（LCEA）≤25°和 LCEA＞25°、髋臼倾斜角（AI）≤10°和 AI＞10°、前中心边缘角（ACEA）≤20°和 ACEA＞20°。
对于 LCEA≤25°组，有 28 个髋关节的平均 LCEA 为 20.96°±3.40°。LCEA≤25°的患者在所有 4 个象限的髋臼唇宽度均较大（P＜0.05）。对于 AI＞10°，有 12 个髋关节的平均 AI 为 12.92°±2.50°。AI＞10°的患者仅在后下象限的髋臼唇较大（P＜0.05）。对于 ACEA≤20°，有 4 个髋关节的平均 ACEA 为 11.25°±5.19°。当按 ACEA≤20°分层时，前下和后下象限的髋臼唇大小明显增大（P＜0.05）。
与非发育不良髋关节相比，发育不良髋关节的髋臼唇明显更大。通过髋关节发育不良的 3 种放射学测量指标中的任何一种测量，发育不良髋关节的后下象限髋臼唇均较大。LCEA≤25°的髋关节在 4 个象限的髋臼唇均较大。
