Critical shoulder angle: Acromial coverage is more relevant than glenoid inclination

Glenoid inclination is associated with full-thickness rotator cuff tears.

Anatomic factors, such as a hooked acromion, have been associated with rotator cuff disorders. Orientation of the glenoid relative to the scapula has been implicated in shoulder instability, but it has not been linked to rotator cuff disorders. The purpose of the current study was to test the hypothesis that superior inclination of the glenoid is associated with full-thickness rotator cuff tear...

3DCT evaluation of acromial coverage

Is the Negative More Relevant than the Positive?

That media reporting on technologies has a strong impact on the corresponding beliefs and attitudes of the audience is an often expressed but hardly proven assumption. A number of hypotheses have been proposed and empirically tested. Due to methodological difficulties the results were often inconclusive. The work described here uses an approach different from those used in previous studies. It ...

Assessment of glenoid inclination on routine clinical radiographs and computed tomography examinations of the shoulder.

BACKGROUND Accurate assessment of glenoid inclination is of interest for a variety of conditions and procedures. The purpose of this study was to develop an accurate and reproducible measurement for glenoid inclination on standardized anterior-posterior (AP) radiographs and on computed tomography (CT) images. MATERIALS AND METHODS Three consistently identifiable angles were defined: Angle α b...

Total shoulder arthroplasty: downward inclination of the glenoid component to balance supraspinatus deficiency.

HYPOTHESIS Supraspinatus deficiency associated with total shoulder arthroplasty (TSA) provokes eccentric loading and may induce loosening of the glenoid component. A downward inclination of the glenoid component has been proposed to balance supraspinatus deficiency. METHODS This hypothesis was assessed by a numeric musculoskeletal model of the glenohumeral joint during active abduction. Three...