Abstract: This study investigated the clinical application value of prosthesis implant simulation using CT three-dimensional reconstruction before total hip arthroplasty (THA). Selected 93 patients who were to undergo THA surgery and divided them into reconstruction group with 47 cases (preoperative CT three-dimensional reconstruction to simulate acetabular prosthesis implantation) and conventional group with 46 cases by random number table. Both groups underwent direct anterior approach total hip arthroplasty in the lateral decubitus position. There was no significant difference in the outer diameter of the cup, cup abduction angle, horizontal distance of the cup rotation center and vertical distance of the cup rotation center between predicted by the preoperative CT three-dimensional reconstruction simulation in the reconstruction group and the intraoperative measurement results (P>0.05). One month after operation, the measured values of SLS and stride length in the reconstruction group were significantly higher than those in the conventional group, and the difference was statistically significant (P<0.05). The distribution of joint function was better than that of the conventional group and the difference was statistically significant (P<0.05). Using CT 3D reconstruction to perform prosthesis implantation simulation before THA can effectively improve the surgical effect, improve the accuracy of prosthesis implantation, and has a better effect on improving the patient's hip joint function and postoperative gait function.

Key words: total hip replacement, CT three-dimensional reconstruction, prosthesis implantation, gait parameters, hip joint function