939 A Comparison of the Short-Term Outcomes Following Robotic-Assisted and Computer-Navigated Total Knee Replacements

Aim Total knee replacements (TKR) remain as one of the most effective procedures for restoring quality of life. Computer-navigated TKR (CN-TKR) have been consistently used for the last two decades whereas robotic-assisted TKR (RA-TKR) have been recently introduced into practice. The primary outcome of this study was to compare the early outcomes following RA-TKR and CN-TKR. Method This retrospective, single-centre, cohort study identified all the patients who underwent a TKR in the Golden Jubilee National Hospital by a single primary hip and knee replacement surgeon between 12th January 2021 and 22nd April 2022. Results were analysed for statistical significance. Results 111 patients underwent a TKR between January 2021 and April 2022. 26 patients underwent a RA-TKR using Stryker’s MAKO SmartRobotics and 85 patients underwent CN-TKR using B. Braun’s OrthoPilot®. Patients who had an RA-TKR were younger, with the average being 64 compared to 69. They also had a greater ROM pre-operatively, with an additional 9 degrees of movement on average. However, post-operatively there was no difference in ROM. There was no change in the mean length of stay (LOS), operation length, blood loss, Oxford score, EQ5-D score, and Forgotten Joint Score. At the 6-week follow-up, 96% of RA-TKR patients were either satisfied or very satisfied compared to 91% of CN-TKR patients. Conclusions This study found no significant difference in short-term clinical outcomes between RA-TKR and CN-TKR. However, a small sample size and a relatively short time frame in which data was collected limits this study to some extent and further research is recommended.