The Academic Congress of Korean Shoulder and Elbow Society (대한견주관절학회:학술대회논문집)
- 2009.03a
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- Pages.44-44
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- 2009
Determination of In-Vivo Glenohumeral Translation During Loaded and Unloaded Arm Elevation
- Nishinaka, Naoya (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Mihara, Kenichi (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Suzuki, Kazuhide (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Makiuchi, Daisuke (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Matsuhisa, Takayuki (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Tsutsui, Hiroaki (Department of Orthopaedic Surgery, Showa University Fujigaoka Rehabilitation Hospital) ;
- Kon, Yoshiaki (Department of Mechanical and Aerospace Engineering, University of Florida) ;
- Banks, Scott A. (Department of Mechanical and Aerospace Engineering, University of Florida)
- Published : 2009.03.27
Abstract
The purpose of this study was to investigate humeral translation relative to the glenoid invivo during loaded and unloaded shoulder abduction. CT scans of 9 healthy shoulders were acquired and 3D models were created. The subject was positioned in front of a fluoroscope and motions were recorded during active abduction. The subjects performed two trials of holding a 3kg weight and unload. 3D motions were determined using model-based 3D-to-2D registration to obtain 6 degrees of freedom kinematics. Glenohumeral translation was determined by finding the location on the humeral head with the smallest separation from the glenoid. Humeral translation was referenced to the glenoid center in the superior/inferior direction. The humerus moved an average of 2 mm, from inferior to central on the glenoid, during arm abduction for both conditions. The humeral head was centered within 1mm from the glenoid center above
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