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Related Experiment Videos

Constrained total shoulder joint replacement: a critical review.

M Post, M Jablon, H Miller

    Clinical Orthopaedics and Related Research
    |October 1, 1979
    PubMed
    Summary

    Constrained total shoulder replacement offers significant pain relief for patients with rotator cuff dysfunction. Optimal outcomes require a strong deltoid muscle and meticulous glenoid component fixation to an intact vault.

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    Area of Science:

    • Orthopedic Surgery
    • Biomedical Engineering

    Background:

    • Constrained total shoulder replacement is a salvage procedure for severe shoulder pain and rotator cuff failure.
    • Restoring shoulder function necessitates addressing glenoid instability and rotator cuff deficiency.

    Purpose of the Study:

    • To evaluate the efficacy of constrained total shoulder replacement as a salvage procedure.
    • To determine the optimal method for glenoid component fixation in this procedure.
    • To identify factors influencing functional outcomes.

    Main Methods:

    • Surgical technique focusing on glenoid component fixation to an intact glenoid vault.
    • Clinical experience and laboratory testing to assess component stability and failure modes.
    • Evaluation of patient outcomes based on deltoid muscle function and rehabilitation.

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    Main Results:

    • Gratifying pain relief was observed in patients undergoing the procedure.
    • Fixation to an intact glenoid vault demonstrated superior stability compared to other methods, preventing loosening or pull-out.
    • Laboratory tests showed fractures medial to the vault, highlighting the importance of preserving vault integrity.
    • Active function is dependent on deltoid muscle strength; poor deltoid function results in passive motion only.

    Conclusions:

    • Constrained total shoulder replacement is effective for pain relief in patients with nonfunctioning rotator cuffs.
    • Preserving the glenoid vault and utilizing secure component fixation are critical for successful outcomes.
    • Patient selection, particularly assessing deltoid muscle function, and comprehensive postoperative rehabilitation are essential for achieving functional recovery.