Robot‐assisted total knee arthroplasty system provides more precise control of the femoral rotation angle: A retrospective study

Abstract

BackgroundRotational alignment in total knee arthroplasty (TKA) is a crucial technical point that needs attention. We conducted a retrospective study to investigate whether a new robot‐assisted TKA (RA‐TKA) could improve the accuracy of rotational alignment and whether rotational alignment affects postoperative pain and functional evaluation of the knee.MethodsA total of 136 consecutive patients who underwent TKA were included in this study. Half of the patients underwent RA‐TKA and the other half underwent conventional TKA (CON‐TKA) by the same group of surgeons. Collect the relevant parameters.ResultsThe postoperative femoral rotation angle (FRA) was −0.72 ± 2.59° in the robot‐assisted group and 1.13 ± 2.73° in the conventional group, and were statistically significantly different (p < 0.001).ConclusionThis study provides preliminary evidence that the RA‐TKA provides more precise control of FRA than CON‐TKA, and verifies that tibial rotation angle and combined rotation angle affect postoperative knee pain and functional evaluation.