Objective:

To compare clinical and radiological outcomes in patients with varus deformity of > 15° undergoing unicompartmental knee arthroplasty (UKA) versus total knee arthroplasty (TKA).

Approach:

• Study Design: Retrospective study evaluating records of patients who underwent UKA and TKA from January 2016 to December 2021, focusing on those with deformity ≥ 15°.
• Patient Selection: Matched 52 pairs of UKA and TKA patients by age and gender, ensuring similar demographic characteristics.
• Outcome Measures: Collected patient-reported outcome measures (PROMs) including Oxford Knee Score (OKS), Short Form-12 Health Survey (SF-12), and Forgotten Joint Score (FJS).
• Surgical Technique: UKA performed using Oxford partial knee, and TKA using Sigma PFC, with specific techniques for soft tissue balancing.

Key Findings:

• Both groups had similar demographic characteristics, including age and gender distribution.
• The mean follow-up duration was longer in the UKA cohort (5.5 years) compared to TKA (3.7 years).
• PROMs were collected preoperatively and annually post-surgery to assess outcomes.

Interpretation:

Limitations:

• Retrospective design may introduce selection bias.
• Limited data on long-term outcomes for UKA in patients with > 15° varus deformity.

Conclusion: