To analyze the application effect of CT digital 3D reconstruction and personalized 3D printing guide plate in total hip arthroplasty for hip dysplasia.

Sixty patients with hip dysplasia who underwent total hip catheterization in our hospital from January 2023 to January 2025 were selected as the research subjects. They were divided into the control group and the observation group by the random number table method, with 30 cases in each group. The control group underwent routine surgical planning before the operation, while the observation group used CT digital three-dimensional reconstruction and individualized 3D printed guide plates for surgical planning before the operation. The surgery-related indicators of the two groups, as well as the coverage rate of acetabular prosthesis, the coverage rate of transplanted bone, and the qualified rate of acetabular cup position were statistically analyzed. The incidence of prosthesis related complications after the operation in the two groups was also statistically analyzed.

The intraoperative blood loss and postoperative drainage volume in the observation group were (337.50±11.39) mL and (192.00±9.33) mL respectively, both of which were less than those in the control group [(378.07±10.89) mL and (218.80±8.19) mL], and the differences were statistically significant (P<0.05). The operation time and the indwelling time of the postoperative drainage tube in the observation group were (82.93±2.64) min and (1.83±0.14) d respectively, which were both shorter than those in the control group [(93.50±3.37) min and (2.53±0.09) d], and the differences were statistically significant (P<0.05). The coverage rate of acetabular prosthesis, the coverage rate of transplanted bone and the qualified rate of acetabular cup position in the observation group were (93.07±0.74)%, (75.10±1.52)% and 96.67% respectively, which were all higher than those in the control group [(89.93±1.02)%, (69.37±1.47)% and 80.00%] The difference was statistically significant (P<0.05). The total incidence of prosthis-related complications such as prosthesis infection, prosthesis loosening and joint dislocation after surgery in the observation group was 3.33%. It was lower than 23.33% of the control group, and the difference was statistically significant (P<0.05).

The application of CT digital three-dimensional reconstruction and individualized 3D printing guide plate in total hip arthroplasty for developmental dysplasia of the hip has a certain significance in improving the efficiency of operation and postoperative recovery. It can improve the coverage rate of acetabular prosthesis, the coverage rate of bone graft and the qualified rate of cup position, and reduce complications.