Medial UKA improved pain, function despite patellofemoral joint degeneration
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Key takeaways:
- Medial UKA was associated with improvements in anterior knee pain and function in patients with patellofemoral joint OA.
- Researchers noted patellofemoral joint OA should have little influence on indications.
According to published results, medial unicompartmental knee arthroplasty was associated with improvements in anterior knee pain and function in patients with patellofemoral joint degeneration.
Researchers prospectively analyzed 673 patients (median age of 64 years) who underwent medial UKA between Oct. 2, 2017, and Aug. 1, 2021. According to the study, 170 patients (25%) had patella osteoarthritis (OA) of grade 1 or higher. Researchers collected patient-reported outcome measures and Knee Injury and Osteoarthritis Outcome Score for Joint Replacement scores for stair climbing, standing upright and rising from sitting preoperatively at a 1-year postoperatively.
Overall, researchers found no associations between patellofemoral OA grading and anterior knee pain or function at 1 year. KOOS JR scores improved a median of 28.8 points at 1 year. Researchers also noted no associations between fixed- and mobile-bearing UKA designs and pain or function at 1 year.
“These results suggest that medial and trochlear [patellofemoral joint] arthritis and preoperative anterior knee pain should continue to have little influence on indications for a medial UKA as the outcomes demonstrate predictable improvement in pain and function,” the researchers wrote in the study.
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