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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
A functional analysis of shoulder fusions
1Department of Orthopaedic Surgery, University of Western Ontario, St. Joseph's Hospital, London, Canada.
Clinical Orthopaedics and Related Research
|October 1, 1987
Summary
Shoulder fusion significantly limits daily activities, especially overhead tasks. Optimal positioning is crucial, but functional deficits persist even in the ideal surgical outcome.
Area of Science:
- Orthopedic Surgery
- Reconstructive Surgery
Background:
- Shoulder fusion (arthrodesis) is a surgical option for painful, nonfunctional shoulders.
- Understanding functional limitations post-fusion is critical for patient counseling.
Purpose of the Study:
- To analyze the functional outcomes of shoulder fusions in patients with normal musculature.
- To identify the impact of fusion positioning on activities of daily living (ADL).
Main Methods:
- Retrospective analysis of seventeen shoulder fusions.
- Exclusion of joints fused for paralysis.
- Assessment of functional ability for ADL.
Main Results:
- Patients experienced significant limitations in overhead work and abducted arm activities.
- Hygiene and behind-the-back functions were frequently difficult.
- Rotational positioning critically impacted head-level and posterior function.
- Recommended position: 25-40° abduction, 20-30° flexion, 25-30° internal rotation.
Conclusions:
- Shoulder fusion imposes substantial functional deficits, even in the recommended position.
- Informed consent must include a thorough discussion of these limitations and surgical risks.
- Patient expectations should be managed regarding the degree of functional recovery.
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The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
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