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Background: Although the cause of posteroinferior instability of the shoulder has not been fully defined, glenoid version can be more completely measured when chondrolabral structures are included because conformity and containment of the glenohumeral joint are integral functions of both the articular cartilage and the labrum. The purpose of this study was to use magnetic resonance imaging-arthrography to evaluate the chondrolabral containment of the glenohumeral joint in patients with atraumatic posteroinferior multidirectional instability of the shoulder. Methods: We evaluated four measurements (osseous and chondrolabral glenoid version, labral height, and glenoid depth) on T2-weighted axial magnetic resonance-arthrography images of thirty-three shoulders with atraumatic posteroinferior multidirectional instability. Shoulders with a documented labral tear were excluded. The measurements were compared with those of thirty-three age-matched controls without glenohumeral pathology. The angles of version of the osseous and chondrolabral portions of the glenoid were measured in three consecutive planes (superior 25%, middle 50%, and inferior 75% in relation to the superior lip of the glenoid) perpendicular to the long axis of the glenoid. Results: The shoulders with posteroinferior instability had greater retroversion of both the osseous and the chondrolabral portion of the glenoid in the middle and inferior planes. The chondrolabral portion of the glenoid had more retroversion than the osseous portion in the inferior plane. The height of the posterior portion of the labrum was decreased in the inferior plane in the shoulders with instability. Glenoid depth in the middle and inferior planes was significantly shallower in the shoulders with instability. Conclusions: Loss of containment in the chondrolabral portion of the glenoid in the middle and inferior planes is a consistent finding in shoulders with atraumatic posteroinferior multidirectional instability and is associated with loss of posterior labral height. It is unclear whether the retroversion of the posteroinferior aspect of the labrum is a cause or a consequence of atraumatic posteroinferior multidirectional instability, but this factor should be considered during surgical repair. Level of Evidence: Diagnostic study, Level IV. See Instructions to Authors for a complete description of levels of evidence. [ABSTRACT FROM AUTHOR]

Evaluates prospectively the surgical outcomes of arthroscopic repair of anterior capsulolabral lesions with use of suture anchors in a large series of patients who were followed for two to six years. Mean age of patients with traumatic recurrent anterior instability of the shoulder; Objective outcome measurement tools used to assess patients; Effectiveness of arthroscopic capsulolabral repair with use of suture anchors.

Evaluate the results of arthroscopic treatment of traumatic unidirectional recurrent posterior subluxation of the shoulder. Mean loss of internal rotation; Effectiveness of arthroscopic posterior labral repair and capsular shift in the treatment of traumatic unidirectional recurrent posterior subluxation; Level of evidence.

Background: The purpose of this study was to evaluate the results of arthroscopic repair of isolated superior labral lesions of the shoulder. Methods: We evaluated thirty-four patients at a mean of thirty-three months (range, twenty-four to forty-nine months) following arthroscopic repair of an isolated superior labral lesion of the shoulder with suture anchors. The outcome of treatment was evaluated with the University of California at Los Angeles shoulder score and on the basis of the patient's ability to return to prior activities. There were thirty male patients and four female patients with a mean age of twenty-six years (range, sixteen to thirty-five years). Thirty patients were involved in athletic activities, and eighteen of them were engaged in overhead sports. Results: Repair of the superior labral lesion resulted in a satisfactory University of California at Los Angeles shoulder score for thirty-two patients (94%) and an unsatisfactory score for two. Thirty-one patients (91%) regained their preinjury level of shoulder function. The shoulder score and the return to activity were correlated with the type of sports activity (r = 0.291, p < 0.0001 and r = 0.373, p = 0.010, respectively. Patients participating in overhead sports had significantly lower shoulder scores and a lower percentage of return to their pre-injury level of shoulder function compared with patients who were not engaged in overhead activity (p = 0.024 and 0.015, respectively). Conclusions: Arthroscopic repair of an isolated superior labral lesion is successful in a majority of patients. However, the results in patients who participate in overhead sports are not as satisfactory as those in patients who are not involved in overhead sports. [ABSTRACT FROM AUTHOR]