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

Background: Rotational 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. Methods: A 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. Results: The postoperative femoral rotation angle (FRA) was -0.72 +/- 2.59 degrees in the robot-assisted group and 1.13 +/- 2.73 degrees in the conventional group, and were statistically significantly different (p < 0.001). Conclusion: This 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.