Planned prosthesis size in modified 3D printed patient-specific instrumentation-assisted total knee arthroplasty: analysis of consistency with intraoperative size

• Published in: Lu jun jun yi da xue xue bao Vol. 44; no. 15; pp. 1523 - 1530
• Main Authors: SUN Bin, ZHANG Jixiao, YUAN Liang, WANG Xiaohua, ZHANG Ke
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Journal of Army Medical University 01.08.2022
• Subjects: 3d printing; patient-specific instrumentation; total knee arthroplasty
• ISSN: 2097-0927
• DOI: 10.16016/j.2097-0927.202202034

Objective To explore the prediction accuracy of prosthesis size of the modified 3D printed patient-specific instrumentation (PSI)-assisted total knee arthroplasty (TKA) by comparing the difference between intraoperative prosthesis size and preoperative planned prosthesis size. Methods We optimized and improved the workflow, design scheme, shape of guide, operation technology and verification method of the traditional PSI-assisted TKA. A total of 126 patients (137 knees) who received 3D printed PSI-assisted TKA based on preoperative CT images in our center were recruited in this study. The differences between the actual prosthesis size and the preoperative planned size were compared and analyzed. Results All patients completed the surgery successfully, and no serious complications occurred. For the femoral side, the difference between the actual used size and the doctor's planned size was observed in 7 cases, and the difference between the actual used size and the engineer's planned size was in 25 cases (P < 0