Kong X, Yang M, Li X, et al. - This research was attempted to assess if surgeon handedness could influence cup positioning in manual total hip arthroplasty (THA), and whether robot could diminish or eliminate the impact of surgeon handedness on cup positioning in robot-assisted THA. Researchers respectively reviewed 53 patients who had undergone bilateral robot-assisted THA and 62 patients who had undergone bilateral manual THA between August 2018 and July 2019 in this study. No significant differences were found in the gender, age, BMI, diagnosis’s composition, and preoperative and postoperative HHS between the robotic and manual group. Surgeon’s handedness exhibited a trend towards an effect on cup positioning in manual THA and robot might help surgeon eliminate the adverse effect. Nevertheless, the effect of handedness on the clinical results still requires further evaluation.