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Shoulder replacement arthroplasty
Annales Chirurgiae Et Gynaecologiae. Supplementum
|January 1, 1985
Summary
The Neer prosthesis offers the best shoulder replacement outcomes for pain and function. However, design limitations can cause upward migration, highlighting the need for improved prosthesis features.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Prosthetic shoulder replacement is a common procedure for various shoulder conditions.
- Different types of shoulder prostheses exist, each with unique design features and clinical outcomes.
Purpose of the Study:
- To evaluate the clinical outcomes of different shoulder prostheses used at Oslo Sanitetsforening Rheumatism Hospital.
- To identify the strengths and weaknesses of specific prosthesis designs, including the Neer type II prosthesis.
Main Methods:
- Retrospective analysis of 64 shoulder replacements in 56 patients.
- Comparison of outcomes between semi-constrained (Lettin/Stanmore), non-constrained (Engelbrecht/St. Georg), and Neer type II prostheses.
- Evaluation of functional outcomes, pain reduction, and complications such as prosthesis migration.
Main Results:
- The Neer prosthesis demonstrated the best results in terms of function and pain reduction.
- Minimal muscular loosening, as recommended by Neer, facilitates postoperative training.
- Upward migration of the prosthesis head was observed in some cases, attributed to the lack of cranial support and head ovalization.
Conclusions:
- The Neer prosthesis is effective for shoulder replacement but requires design improvements for enhanced cranial support and head shape.
- An ideal prosthesis should be non-constrained with customizable components (neck length, head size, stem size) and a glenoid socket with cranial support.
- Special considerations and skilled surgical technique are necessary for juvenile rheumatoid arthritis patients.