Abstract
Introduction: Glenohumeral instability associated with a significant osseous defect of the glenoid is often treated with bone graft to restore the glenoid concavity. The purpose of this study is to investigate the effects on the intrinsic stability provided by the glenoid of (1) a standardized anteroinferior glenoid defect and (2) different heights and configurations of anteroinferior glenoid bone graft. Methods: Utilizing a tipping device to measure the balance stability angle, the anteroinferior stability provided by the glenoid concavity was assessed in each of four fresh frozen, grossly normal cadaver glenoids in (1) the unaltered state, (2) after creating a standardized defect of a magnitude reported by other investigators to be sufficient to require a bone graft, and (3) after a succession of steps varying the bone graft height and contour.
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