Fig. 1.

Comparison of femoral and sagittal alignment in the manual unicompartmental knee arthroplasty (MUKA) and robotic-assisted unicompartmental knee arthroplasty (RAUKA) groups. a) For the MUKA group, green shading indicates the region of optimal femoral coronal angle ((FCA) ≤ 10° deviation from the neutral axis and femoral sagittal angle (FSA) < 15° flexion) and sagittal (tibial coronal angle (TCA) ≤ 5° deviation from the neutral axis and tibial sagittal angle (TSA) ≤ 5° deviation from 7°) alignment based on preoperative targets. b) For the RAUKA group, green shading indicates the regions of optimal femoral and tibial alignent based on deviation from intraoperative targets. In both instances, outliers that remain within approximately 2° of the optimal alignment targets are indicated with yellow shading. “Far” outliers, which are ≥ 2° outside of optimal alignment, are indicated with red shading.