Change in labrum height after arthroscopic Bankart repair: correlation with preoperative tissue quality and clinical outcome.

Abstract

Arthroscopic factors, such as labral and capsular tissue quality or anterior labral periosteal sleeve avulsion (ALPSA) lesion, affect postoperative labral height stability. Labral height stability has a correlation with clinical outcome. The study included 40 patients who underwent arthroscopic surgery for a Bankart lesion between August 2005 and May 2009. The mean follow-up and patient age were 29.1 ± 10.9 months (range, 15-60 months) and 24.7 ± 8.4 years (range, 12-55 years), respectively. Labral and capsular tissue quality, ALPSA lesions, Hill-Sachs lesions, glenoid erosion, and superior labrum anterior-posterior tears were identified by arthroscopic examination. Stepwise postoperative computed tomography arthrography to estimate the labral height was performed at 3 months and 1 year. Correlation of postoperative 1 year Rowe scores with labral height maintenance was statistically significant (P < .01). Correlation of Rowe scores at 1 year postoperatively with labral height at 1 year postoperatively was also statistically significant (P < .01). The mean postoperative labral height at 3 months and at 1 year was 5.13 ± 1.56 mm (range, 2.9-8.8 mm) and 4.69 ± 1.75 mm (range, 1.6-8.5 mm), respectively (P < .01). The decrease in labral height at 1 year after surgery was significant in those patients with ALPSA lesions, Hill-Sachs lesions, and a poor labrum along with a poor capsule (P < .01). The patients with less labral height decrease between 3 months and 1 year or higher labral height at 1 year postoperatively showed higher Rowe scores at 1 year postoperatively. Shoulders with ALPSA lesions, Hill-Sachs lesions, and a poor labrum with poor capsular tissue quality correlated more strongly with postoperative labral height decrease.