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Unicompartmental arthroplasty: a long-term follow-up study
1Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, North Carolina 28232, USA.
The Journal of Arthroplasty
|June 30, 1998
Summary
Marmor-style unicompartmental knee arthroplasty (UKA) provides long-term symptom relief and excellent function for carefully selected patients with single compartment knee arthritis. This study shows high survivorship and functional outcomes for this knee replacement technique.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Arthroplasty Research
Background:
- Single compartment knee arthritis affects a significant patient population.
- Unicompartmental knee arthroplasty (UKA) is a surgical option for focal knee osteoarthritis.
- Marmor-style cemented tibial components have been utilized in UKA procedures.
Purpose of the Study:
- To evaluate the long-term survivorship and functional outcomes of Marmor-style non-metal-backed cemented tibial components in UKA.
- To assess the impact of patient factors on UKA outcomes.
Main Methods:
- Seventy-three consecutive UKAs were performed using Marmor-style components between 1975 and 1990.
- Sixty-seven knees with a minimum 5-year follow-up were retrospectively analyzed.
- Knee function and rating were assessed using the updated Knee Society scoring system.
Main Results:
- Survivorship rates were 91% at 5 years, 84% at 10 years, and 79% at 15 years.
- Mean knee rating for surviving implants was 91, with a mean functional score of 77.
- Outcomes were not significantly affected by body mass index, age, gender, or component thickness.
Conclusions:
- Marmor-style UKA demonstrates durable long-term results for carefully selected patients.
- This arthroplasty technique offers significant symptom relief and functional improvement for isolated knee compartment osteoarthritis.
- Patient selection is crucial for achieving favorable long-term outcomes in UKA.