12 papers · updated 2026-09-26 · Adult Reconstruction · All topics
The newest papers on unicompartmental knee arthroplasty from the orthopaedic journals The Reduction reads, newest first, each with a one-line summary. The list is drawn from the digest’s archive and refreshed every week.
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Preoperative medial proximal tibial angle did not affect two-year outcomes after mobile-bearing UKA, though varus tibial component alignment helped patients with lower preoperative MPTA.
Patient-Reported Outcomes Following Custom Unicompartmental Knee Arthroplasty.
Custom UKA implants showed no PROM advantage over off-the-shelf components and had higher 2-year revision rates, largely due to aseptic loosening, questioning their added value.
Preoperative frailty (higher Clinical Frailty Scale) independently predicted lateral compartment osteoarthritis progression and worse functional scores after medial UKA over a mean 70-month follow-up, aiding patient counseling.
In a case series of 30 patients, an experienced surgeon reached proficiency with ROSA-assisted medial UKA by the sixth case, with excellent early tibial radiographic accuracy versus plan.
In medial UKA patients selected by MRI, mild concomitant lateral bone marrow lesions did not worsen mid-term pain, function, or alignment outcomes compared to isolated medial lesions.
In a randomized trial, robotic-assisted medial UKA achieved more accurate component positioning, less pain, shorter hospital stay, and better mid-term Forgotten Joint Scores than jig-based UKA, though standard PROMs were similar.
In 113 fixed-bearing lateral UKAs followed up to 22 years, implant survivorship remained high (87% at 20 years) with significant, durable improvements in Oxford Knee Scores.
This meta-analysis of over 20,000 cases found CT-guided robotic-arm-assisted UKA had a low complication rate (3.8%) and fewer overall complications than manual UKA (5.5%), supporting its safety.
In a matched cohort, fixed-bearing UKA gave comparable two-year outcomes for spontaneous osteonecrosis and osteoarthritis, though larger necrotic lesions in SONK patients may require extra femoral fixation support.
Robotic bi-unicompartmental knee arthroplasty achieves comparable five-year outcomes to total knee arthroplasty for medial-lateral arthritis, offering viable patient-specific alternative.
Reviews management of failed UKA, concluding conversion to TKA remains the gold standard but often doesn't yet match outcomes of primary TKA.
Consensus statement on unicompartmental knee replacement: A collaboration between BASK and EKS.
Expert consensus recommends unicompartmental knee arthroplasty as alternative to total knee replacement for eligible patients and emphasizes avoiding low-volume surgeon use to optimize outcomes.
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