This study used a dynamic 3D method of analyzing glenohumeral kinematics following rotator cuff teardbiplane fluoroscopy with computed tomography (CT). Biplane fluoroscopy is a recently emerging, highly accurate way to measure the in vivo 3D kinematics of the bony structures of a joint. It has had some use on the shoulder joint but limited work on the kinematic effects of rotator cuff tears. Bey studied patients postoperatively to determine how well surgical repair of the rotator cuff returned glenohumeral kinematics compared with asymptomatic controls.
The purpose of this study was to quantitatively mea- sure the 3D glenohumeral translations during dynamic shoulder abduction in the scapular plane, using a biplane fluoroscopy system, in patients with supraspinatus rotator cuff tears. It was hypothesized that during shoulder abduction in the scapular plane (scaption), subjects with rotator cuff tears would demonstrate dynamic superior migration of the humeral head relative to subjects with asymptomatic shoulders.
Full Article: Alterations in Glenohumeral Kinematics in Patients With Rotator Cuff Tears Measured With Biplane Fluoroscopy