A comparative study of early postoperative pain: robotic-assisted versus conventional total knee arthroplasty.

Purpose: While robotic-assisted total knee arthroplasty (RA-TKA) has demonstrated improved surgical precision, its impact on early postoperative pain management remains unclear. This study compared early postoperative pain outcomes between RA-TKA and conventional TKA (C-TKA).
Methods: In this retrospective study, 230 consecutive patients (309 knees) who underwent primary TKA were analyzed: 143 patients (181 knees) in the C-TKA group and 87 patients (128 knees) in the RA-TKA group. Pain scores at rest and during movement were assessed using the Numerical Pain Rating Scale for 72 h postoperatively. Secondary outcomes included opioid consumption and length of hospital stay.
Results: While pain scores at rest showed no significant differences between groups, RA-TKA patients reported significantly lower pain scores during movement at 24 h post-surgery (p = 0.023). The RA-TKA group demonstrated significantly reduced opioid consumption during the first 48 postoperative hours (p = 0.001 for 0-24 h; p = 0.03 for 24-48 h) and shorter length of hospital stay (p = 0.011). Subgroup analysis of unilateral procedures showed similar advantages in the RA-TKA group.
Conclusion: RA-TKA was associated with reduced pain during movement, decreased opioid consumption, and shorter hospital stay in the early postoperative period compared to C-TKA.
Competing Interests: Declarations. Ethics approval: This study was approved by Siriraj Institutional Review Board (COA468/2566). Informed consent: The requirement for informed consent was waived by the ethics committee due to the retrospective nature of the study. Consent for publication: Not applicable as no identifying information of participants is included in this manuscript. Competing interests: The authors declare no competing interests.
(© 2025. The Author(s).)