Does glenoid remodeling occur with an erosion-type bone loss after arthroscopic Bankart repair?

Abstract

Introduction: Fragment-type glenoid bone loss is known to remodel after arthroscopic Bankart repair. To our knowledge, no studies have been reported about the morphologic changes of the erosion-type bone loss. Aim: To determine the morphologic changes of erosion-type glenoid bone loss after arthroscopic Bankart repair. Methods: Twenty-eight patients (mean age: 31 years) with traumatic anterior glenohumeral instability with an erosion-type glenoid bone loss <25% underwent arthroscopic Bankart repair. The minimum follow-up was 2 years. Pre- and postoperative bilateral computed tomography scans were performed in all patients. The width and surface area of the glenoid were measured by a software program and compared pre- and postoperatively. Results: The recurrence rate was 7.1% (2 of 28 shoulders). The size of the bone loss was 7.2% ± 5.3% (mean ± standard deviation). The preoperative glenoid width and area were 24.9 ± 2.2 mm and 7.0 ± 0.8 cm2, respectively, and the postoperative ones (2 years after surgery) were 24.7 ± 2.2 mm and 6.8 ± 0.8 cm2, respectively. There were no significant differences between the pre- and postoperative glenoid width and area. Discussion and conclusion: Unlike the fragment-type bone loss, the erosion-type bone loss <25% did not show any morphologic changes of the glenoid at least 2 years after arthroscopic Bankart repair.

Keywords

• Shoulder instability
• glenoid bone loss
• erosion
• Bankart repair
• stabilization procedure
• remodeling