Critical shoulder angle: a "combined shoulder angle"-balanced contributions of glenoid inclination and acromial angle in shoulder arthritis progression.

The critical shoulder angle (critical shoulder angle) has been described as a morphometric value that could be predisposing to the evolution of a shoulder toward a primary glenohumeral osteoarthritis (primary glenohumeral osteoarthritis) or massive rotator cuff tear (massive rotator cuff tear).

The aim of this study is to evaluate the impact of glenoid inclination and acromial angle measurements on critical shoulder angle value in primary glenohumeral osteoarthritis and massive rotator cuff tear.