In 54 Oxford unicompartmental knee arthroplasties, a new MRI medial-femoral-condyle measurement correctly sized 50 cases (92.6%), outperforming intraoperative spoon sizing at 70.4% and other methods at 46.3-59.3%.
Key findings
- MRMFC accuracy was 92.6% (95% CI 82.1-97.9) and exceeded the sizing spoon (p=0.008), radiographic templating, Yang MRI and anthropometric estimation (all p
Why this matters globally
More accurate component sizing may reduce overhang and underhang linked to implant performance and failure, making the method relevant to centres using MRI and Oxford UKA.
Thai researcher contribution
Thai surgeons and researchers at Buddhachinaraj Hospital and Naresuan University developed the MRMFC technique and evaluated it in a real clinical series.
Limitations to consider
The 54-case series lacks reported external multicentre validation. It evaluates sizing agreement rather than long-term implant survival, symptoms or function.