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Nonengaging Hill-Sachs deformity
5%
27/550
Intra-articular loose body
2%
10/550
Anterior glenoid bone deficiency of 35%
87%
476/550
Subacromial bursitis
1%
8/550
10% partial-thickness, articular side tear of the supraspinatous
3%
19/550
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Anterior glenoid bone deficiency of 35% is most predictive of recurrence. Figure 177 shows an acute tear of the anterior inferior glenoid labrum consistent with a Bankart lesion. It has been clearly shown that there is a direct relationship between failure (ie, recurrent dislocation) of arthroscopic Bankart repair and anterior glenoid bone loss. Anterior glenoid bone loss of greater than 25% in the setting of anterior glenohumeral instability is a relative contraindication to performing arthroscopic stabilization and instead is an indication to perform a bony glenoid augmentation procedure to address the articular arc deficit. Therefore, an anterior bony defect of 35% is the most predictive finding at the time of surgery for recurrent dislocation. An engaging Hill-Sachs deformity has a significant effect on the rate of redislocation, but a nonengaging one should not. An intra-articular loose body, subacromial bursitis, and a partial-thickness articular-sided supraspinatous tear should not lead to an increased risk of recurrent dislocation following Bankart repair.
3.4
(8)
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