Anterior femoral notching in total knee arthroplasty assisted with 3D printed patient-specific instrumentation: a cause analysis

• Published in: Lu jun jun yi da xue xue bao Vol. 44; no. 15; pp. 1549 - 1556
• Main Authors: WANG Xiaohua, JI Xiaope, ZHANG Jixiao, YUAN Liang, SUN Bin
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Journal of Army Medical University 01.08.2022
• Subjects: 3d printing technology; anterior femoral notching; imaging; patient-specific instrumentation knee replacement; three-dimension
• ISSN: 2097-0927
• DOI: 10.16016/j.2097-0927.202112126

Objective To find out the causes of anterior femoral notching in 3D printed patient-specific patient-specific instrumentation (PSI) assisted total knee arthroplasty (TKA). Methods A retrospective analysis was carried out on the consecutive cases undergoing PSI assisted TKA in the Peking University International Hospital from January 2019 to September 2021. The clinical data of those having anterior femoral notching were collected. 3D CT scanning was performed on the knee joint after intraoperative osteotomy and the intraoperative bone fragments. Rapidform software (Version 2006) was used to reconstruct 3D images and to perform image registration and comparison analysis with the preoperatively planned 3D models. The anterior femoral notching depth was measured, and the differences in the thickness of bone fragments between preoperatively planned and intraoperative bone cutting in order to analyze the causes of the anterior femoral notching. Results A total of 86 consecutive cases (94 knees) were included and 1