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Unicompartmental knee arthroplasty: is it durable?
1Auckland Hospital, Auckland, New Zealand.
The New Zealand Medical Journal
|October 29, 2003
Summary
The Marmor/Mod 2 unicompartmental knee arthroplasty demonstrates excellent long-term durability. This study shows high survival rates, indicating its effectiveness for elderly patients needing knee replacement.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Unicompartmental knee arthroplasty (UKA) is a surgical procedure to replace one compartment of the knee joint.
- The Marmor/Mod 2 prosthesis is a specific type of implant used in UKA.
Purpose of the Study:
- To evaluate the long-term durability and clinical outcomes of the Marmor/Mod 2 unicompartmental knee arthroplasty.
- To compare the performance of the Marmor/Mod 2 prosthesis with other UKA prostheses in published studies.
Main Methods:
- A retrospective survivorship analysis was conducted on 113 medial UKAs performed between 1974 and 1989.
- Clinical assessment using the Knee Society Score and radiographic evaluation were performed on surviving prostheses.
Main Results:
- The survival rate for the Marmor/Mod 2 prosthesis was 95% at 10 years and 85% at 15 years.
- Surviving prostheses showed satisfactory clinical scores (Knee Society Knee Score: 72, Knee Society Functional Score: 56).
- Radiographic evaluation revealed no loosening or fracture in the examined prostheses.
Conclusions:
- The Marmor/Mod 2 unicompartmental knee arthroplasty demonstrates satisfactory long-term durability.
- This prosthesis offers a viable option for elderly patients undergoing knee replacement, with outcomes comparable to other UKA designs.
