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. 2022 Sep 14;10:904012. doi: 10.3389/fbioe.2022.904012

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Copyright © 2022 Tang, Zheng, Luo, Wu, Tian and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Movement trajectory of the medial/lateral condyle of the femur with the tibia as a fixed rigid body. The red asterisk represents the medial condyle, the yellow triangle represents the lateral condyle, and the two white circles represent the average position of the movement trajectory of the medial condyle and the lateral condyle, respectively. PC is the standard deviation of the distance between the white circle and each red asterisk/yellow triangle around it. (X) Coronal plane. (Y) Sagittal plane. (Z) Horizontal plane. (MX, MY, MZ) Local magnification of the movement trajectory of the femoral medial condyle. (LX, LY, LZ) Local enlargement of the movement trajectory of the femoral lateral condyle. (Z, LZ, MZ) The reverse screw home phenomenon at the flexion of 40°–70° and screw home of flexion over 70° should be noted.