The Reduction in Stability From Combined Humeral Head and Glenoid Bony Defects Is Influenced by Arm Position
Background : Combined defects of the glenoid and humeral head are often a cause for recurrent shoulder instability.
Purpose / Hypothesis : The aim of this study was to evaluate the influence of combined bony lesions on shoulder instability through varying glenohumeral positions. The hypothesis was that instability due to combined defects would be magnified with increasing abduction and external rotation.
Stability of the Glenohumeral Joint With Combined Humeral Head and Glenoid Defects
Background : Shoulders with recurrent anterior instability often have combined bony defects of the humeral head and glenoid.Previous studies have looked at only isolated humeral head or glenoid defects.
Purpose / Hypothesis : The aim of this study was to define the relationship of combined humeral head and glenoid defects on anterior shoulder instability. Combined bony defects will lead to increased instability compared with an isolated defect, and the ‘‘critical’’ size of humeral head and glenoid defects that need to be addressed to restore stability will be smaller when combined rather than isolated.
The Effects of Latarjet Reconstruction on Glenohumeral Kinematics in the Presence of Combined Bony Defects
Background : Recurrent glenohumeral instability is often a result of underlying bony defects in the glenoid and/or humeral head.Anterior glenoid augmentation with a coracoid bone block (ie, Latarjet procedure) has been recommended for glenoid bone loss in the face of recurrent instability. However, no study has investigated the effect of Latarjet augmentation in the setting of both glenoid and humeral head defects (Hill-Sachs defects).
Purpose : To evaluate the glenohumeral kinematics of the Latarjet procedure in the presence of combined bony defects.