The Journal of Bone and Joint Surgery (American). 2005;87:107-113.
doi:10.2106/JBJS.E.00483
© 2005 The Journal of Bone and Joint Surgery, Inc.
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In Vivo Determination of the Dynamics of Normal, Rotator Cuff-Deficient, Total, and Reverse Replacement Shoulders

Mohamed Mahfouz, PHD, Gregory Nicholson, MD, Richard Komistek, PHD, David Hovis, MD and Matthew Kubo, BS

Corresponding author:
Richard Komistek, PhD
The University of Tennessee, 301 Perkins Hall, Knoxville, TN 37996. E-mail address: rkomiste@utk.edu

The first 150 words of the full text of this article appear below.


   Introduction
 
Patients with osteoarthritis of the shoulder experience pain and decreased range of motion, which compel them to seek care. The vast majority of osteoarthritic shoulders have an intact rotator cuff. However, the rotator cuff may function poorly because of osseous deformity and soft-tissue contracture. Total shoulder arthroplasty has proved to be a reliable procedure for pain relief and improved function1-5. The ultimate functionality of the arthroplasty depends on multiple factors, including alignment of the prosthetic implant, rotator cuff muscle belly health, soft-tissue balance achieved at the time of surgery, and patient compliance with rehabilitation3-6.

Rotator cuff deficiency most commonly occurs as a degenerative condition (rotator cuff tear arthropathy). In these cases, the rotator cuff is irreparable. Shoulder function can be very poor, especially with regard to active forward elevation. When a severe fracture is treated with hemiarthroplasty, there can be subsequent loss of fixation of the greater . . . [Full Text of this Article]


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