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Related Experiment Videos

Modular total shoulder replacement. Design rationale, indications, and results

J M Fenlin1, M L Ramsey, T J Allardyce

  • 1Department of Orthopaedic Surgery, Thomas Jefferson University Hospital, Philadelphia, PA.

Clinical Orthopaedics and Related Research
|October 1, 1994
PubMed
Summary

Modular total shoulder arthroplasty offers significant benefits, including precise component placement and improved patient outcomes. This study found high rates of pain relief and range of motion improvement in patients undergoing this procedure.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Modular total shoulder systems offer advantages over nonmodular designs.
  • Modularity allows for precise humeral head placement, soft tissue balancing, and easier revision surgery.

Purpose of the Study:

  • To review the outcomes of modular total shoulder arthroplasty.
  • To discuss surgical and design considerations for modular systems.

Main Methods:

  • Review of 47 total shoulder arthroplasties in 40 patients (1986-1991).
  • Analysis of patient demographics, diagnoses, surgical outcomes, and radiographic findings.

Main Results:

  • 93.5% of patients achieved pain relief.
  • Significant improvements in forward flexion (34.9°), external rotation (18.1°), and internal rotation (4 vertebral levels).

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  • Low rates of glenoid revision (3 patients) and symptomatic loosening (1 patient).

    • Conclusions:

    • Modular total shoulder arthroplasty provides excellent pain relief and functional improvement.
    • Radiographic lucency was observed but rarely required revision surgery.
    • The modular design simplifies surgical procedures and revision options.