Date of Award
Kevin B. Shelburne, Ph.D.
Peter Laz, Ph.D.
Bradley Davidson, Ph.D.
Anatomic total shoulder arthroplasty, Biplane radiography, Individuals, Kinematics, Reverse total shoulder arthroplasty
Total Shoulder Arthroplasty (TSA) is a surgery which replaces the shoulder joint, or the interface between the humerus and the scapula glenoid. To test TSA success, most prior research compares patients with TSA to healthy controls. However, the shoulder anthropometry, motion, and musculature of individuals varies widely across the population making it important to assess TSA performance in individuals. The overall goal of this study is to determine if patients with one of two TSA implant designs on one side achieve the same range of motion as their intact side, and if so to find if they compensate using increased scapula rotation over normal humeral motion. Six TSA subjects performed for each shoulder abduction, forward flexion, and internal/external (I/E) humerus rotation with their arm abducted to 0° and 90°, captured as x-ray videos with a Radiography System. Glenohumeral and scapulothoracic kinematics were calculated. Results show that TSA shoulder trends for abduction and flexion lie within the range of healthy standard deviation for both glenohumeral and scapulothoracic elevation. No substantial differences were observed between TSA and healthy shoulders’ overall motion but that the scapula exhibits some compensation in elevation for TSA shoulders, especially in flexion. I/E implanted shoulder results additionally show a deficit compared to intact shoulders, with scapula retraction compensation presenting more strongly with the arm abducted to 0° than at 90°.
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Walden, Sarah Rose, "Side-to-Side Comparison of Total Shoulder Arthroplasty and Intact Function in Individuals" (2019). Electronic Theses and Dissertations. 1698.
Received from ProQuest
Sarah Rose Walden
Biomechanics, Surgery, Mechanical engineering