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[Ankle prostheses. Mid-term results after Thompson-Richards and STAR prostheses]
1Orthopädische und Rheumaorthopädische Abteilung, Kreuznacher Diakonie, Bad Kreuznach.
Der Orthopade
|May 20, 1998
Summary
Cementless S.T.A.R. ankle prostheses demonstrated superior long-term outcomes and fewer complications compared to cemented Thompson-Richards prostheses in rheumatoid arthritis patients. This study highlights the S.T.A.R. prosthesis as a potentially more durable option for ankle replacement surgery.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Rheumatology
Context:
- Rheumatoid arthritis frequently necessitates ankle replacement surgery, impacting patient mobility and quality of life.
- Evaluating the long-term efficacy and safety of different ankle prosthesis designs is crucial for clinical decision-making.
- Cemented Thompson-Richards prostheses (TRP) and cementless S.T.A.R. prostheses are commonly used in ankle arthroplasty.
Purpose:
- To compare the clinical outcomes and radiological findings of cemented Thompson-Richards prostheses and cementless S.T.A.R. prostheses in patients with rheumatoid arthritis.
- To assess the implant survival rates and identify potential complications associated with each prosthesis type.
Summary:
- This study followed 37 patients (20 TRP, 19 S.T.A.R.) for 1-12 years, assessing outcomes using the Kofoed ankle score.
- S.T.A.R. prostheses showed higher scores (86.9 pts) than TRP (77.7 pts). Radiological assessment revealed high radiolucency (53.3%) and talar subsidence (3 cases) in cemented TRP, while cementless S.T.A.R. showed minimal radiolucency and no talar subsidence.
- TRP had a 12-year survival rate of 87% with revisions for loosening and fracture. S.T.A.R. had a 6-year survival rate of 94.3% with revisions for meniscal issues.
Impact:
- The cementless S.T.A.R. prosthesis appears to offer better functional outcomes and a lower rate of radiolucency and subsidence compared to the cemented Thompson-Richards prosthesis.
- Findings suggest the S.T.A.R. prosthesis may provide a more durable and reliable solution for ankle arthroplasty in rheumatoid arthritis patients.
- This comparative analysis provides valuable evidence for orthopedic surgeons selecting ankle prostheses, potentially improving patient long-term joint function.