Retrospective review evaluates functional outcomes of internal rotation in total knee arthroplasty, suggesting no detriment in function.
Key Points
This study aimed to describe femoral component rotation in functionally aligned total knee arthroplasty (TKA) and its influence on functional outcomes.
Retrospective review of 2760 robotic-assisted functionally aligned TKAs performed by two surgeons.
Femoral component rotation assessed relative to the surgical transepicondylar axis during implantation using an image-based system.
Outcomes evaluated include Forgotten Joint Score and knee flexion range of motion at 1 year follow-up.
Mean femoral component rotation was 0.3° external to the surgical transepicondylar axis.
>2° internal rotation occurred in 12% of cases, with no significant difference in functional outcomes at 1 year follow-up.
Multivariate analysis showed no correlation between femoral component rotation and postoperative functional scores.