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The semiconstrained total shoulder arthroplasty.

M J Coughlin, J M Morris, W F West

    The Journal of Bone and Joint Surgery. American Volume
    |June 1, 1979
    PubMed
    Summary
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    Total shoulder arthroplasty with the Stanmore prosthesis offers pain relief and improved motion for arthritis patients. However, lifting heavy loads remains challenging, and complications can occur.

    Area of Science:

    • Orthopedic Surgery
    • Biomedical Engineering
    • Rheumatology

    Background:

    • Total shoulder arthroplasty (TSA) is a surgical option for severe glenohumeral joint arthritis.
    • The semiconstrained Stanmore prosthesis is one implant used in TSA.
    • Evaluating outcomes in diverse patient populations is crucial for optimizing TSA results.

    Purpose of the Study:

    • To assess the two-year outcomes of TSA using the semiconstrained Stanmore prosthesis.
    • To compare patient outcomes based on the etiology of glenohumeral joint arthritis.
    • To identify factors influencing range of motion and patient satisfaction after TSA.

    Main Methods:

    • A two-year follow-up study of sixteen patients who underwent TSA with the Stanmore prosthesis.
    • Patient-reported outcomes including pain relief, satisfaction, and analgesic use were collected.

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  • Objective measures included range of motion and functional assessment of lifting capacity.
  • Complications were recorded and analyzed.

    • Main Results:

    • Patients with rheumatoid arthritis or osteoarthritis reported greater pain relief, satisfaction, and increased range of motion compared to those with traumatic arthritis.
    • Patients with irreparable rotator-cuff injury showed the poorest postoperative range of motion.
    • Younger patients achieved significantly greater motion gains than older patients.
    • All patients experienced persistent difficulty with heavy load lifting.

    Conclusions:

    • The Stanmore prosthesis provides significant benefits for patients with inflammatory or degenerative arthritis of the glenohumeral joint.
    • Rotator-cuff integrity and patient age are important factors influencing functional recovery after TSA.
    • While improving motion and pain, TSA with this prosthesis does not fully restore heavy lifting capacity.