Hypothesis: 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.
Methods: 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.
Results: 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).
Conclusions: 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.
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