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Better clinical outcomes at one year follow-up.
2%
64/2741
Greater survivorship rate at 10 year follow-up
1%
32/2741
Faster postoperative rehabilitation
93%
2553/2741
Better postoperative knee alignment
54/2741
Reduced risk of secondary surgery within the first year
25/2741
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Unicompartmental knee arthroplasty has been shown to result in faster rehabilitation compared to total knee arthroplasty. Theoretically, the knee kinematics are closer to anatomic as the ACL is preserved. This has not resulted in increased longevity, less pain, or better clinical outcomes on a consistent basis. Contraindications to unicompartmental knee arthroplasty include ACL deficiency, flexion contracture, coronal malalignment, and inflammatory arthritis. Heck et al performed a multi-center review of unicompartmental knee arthroplasties. Survivorship was 91% at 10 years. Obesity was associated with a higher rate of revision. Fisher et al reviewed 91 patients who underwent either TKA or UKA. Patients who underwent a UKA experienced a faster return to function and quicker discontinuation of postoperative narcotic medications. Blood loss and length of hospital stay were greater in the TKA group. Rate of complications was similar in both groups.
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