Sunny C Cheung

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BACKGROUND The axillary nerve may be injured during percutaneous fixation of proximal humerus fractures. This study investigated the kinematic behavior of the superior and inferior borders of the axillary nerve under varying shoulder positions. This information may reduce iatrogenic neurologic injury during fracture reduction and hardware placement. (More)
BACKGROUND Fatty infiltration and muscle atrophy have been described as interrelated characteristic changes that occur within the muscles of the rotator cuff after cuff tears, and both are independently associated with poor outcomes after surgical repair. We hypothesize that fatty infiltration and muscle atrophy are two distinct processes independently(More)
Smoking impairs bone healing and increases the risk for complications associated with nonunions. The efficacies of 2 different allografts, Grafton (demineralized bone matrix [DBM] in a gel-like glycerol carrier) and Orthoblast (DBM with a reverse thermal poloxamer carrier) were examined with respect to nonunions in patients who reported heavy tobacco use.(More)
PURPOSE We aim to determine the prevalence of fatty infiltration and tears in the infraspinatus and to identify any associated risk factors. METHODS Shoulder magnetic resonance imaging scans from 2006 to 2009 were reviewed. Arthrograms, inflammatory arthropathies, neoplasms, and fractures were excluded. Rotator cuff tears were graded in 4 categories: no(More)
Surgeon recommendation is the primary influence for patients choosing a graft for their ACL reconstruction. However, it is unknown if demographic factors also play a role. We hypothesize that education, age, and living in an urban setting may influence a patient's graft choice. Patients who had an ACL reconstruction from 2005 to 2009 were identified(More)
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