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The American Journal of Sports Medicine 27:339-344 (1999)
© 1999 American Orthopaedic Society for Sports Medicine

Biomechanics of the Bankart Repair: The Relationship Between Glenohumeral Translation and Labral Fixation Site

Kevin P. Black, MD{dagger}, David J. Schneider, MD, James R. Yu and Chris R. Jacobs, PhD

Department of Orthopaedics and Rehabilitation, Musculoskeletal Research Laboratory, Pennsylvania State University College of Medicine, Hershey, Pennsylvania

Presented at the interim meeting of the AOSSM, New Orleans, Louisiana, March 1998.

{dagger} Address correspondence and reprint requests to Kevin P. Black, MD, POB 850, Department of Orthopaedics and Rehabilitation, College of Medicine, Penn State University, Hershey, PA 17033

The specific aim of this study was to quantify glenohumeral translations in cadaveric shoulders after repair of the superior and middle regions of a surgically created Bankart lesion and after repair of the superior, middle, and inferior regions of the same lesion. Anterior-posterior, superior-inferior, and medial-lateral translations in nine cadaveric specimens were tested with shoulders in 0°, 45°, and 90° of humeral abduction and varying degrees of humeral rotation. There was statistically significantly less anterior and inferior translation after three-site labral repair compared with after two-site labral repair, and this effect was greatest at 90° of glenohumeral abduction. The decreased translations demonstrated with three-site repair emphasized the importance of careful repair of the labrum to the inferior glenoid rim during a Bankart reconstruction and suggested that failure to do so may be a contributing factor to recurrent instability after anterior shoulder reconstruction.




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Copyright © 1999 by the American Orthopaedic Society for Sports Medicine.