caa a22 4500 605460884 CHVBK 20210128100240.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00167-014-3249-1 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3249-1 Is the posterior cruciate ligament necessary for medial pivot knee prostheses with regard to postoperative kinematics? [Elektronische Daten] [Chao-Hua Fang, Chia-Ming Chang, Yu-Shu Lai, Wen-Chuan Chen, Da-Yong Song, Colin McClean, Hao-Yuan Kao, Tie-Bing Qu, Cheng-Kung Cheng] Purpose: Excellent clinical and kinematical performance is commonly reported after medial pivot knee arthroplasty. However, there is conflicting evidence as to whether the posterior cruciate ligament should be retained. This study simulated how the posterior cruciate ligament, post-cam mechanism and medial tibial insert morphology may affect postoperative kinematics. Methods: After the computational intact knee model was validated according to the motion of a normal knee, four TKA models were built based on a medial pivot prosthesis; PS type, modified PS type, CR type with PCL retained and CR type with PCL sacrificed. Anteroposterior translation and axial rotation of femoral condyles on the tibia during 0°-135° knee flexion were analyzed. Results: There was no significant difference in kinematics between the intact knee model and reported data for a normal knee. In all TKA models, normal motion was almost fully restored, except for the CR type with PCL sacrificed. Sacrificing the PCL produced paradoxical anterior femoral translation and tibial external rotation during full flexion. Conclusion: Either the posterior cruciate ligament or post-cam mechanism is necessary for medial pivot prostheses to regain normal kinematics after total knee arthroplasty. The morphology of medial tibial insert was also shown to produce a small but noticeable effect on knee kinematics. Level of evidence: V. European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA), 2014 Total knee arthroplasty nationallicence Posterior cruciate ligament nationallicence Medial pivot nationallicence Kinematics nationallicence Fang Chao-Hua Department of Joint Surgery, The 6th Hospital of Ningbo, Ningbo, Zhejiang, China aut Chang Chia-Ming Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut Lai Yu-Shu Orthopaedic Device Research Center, National Yang Ming University, Taipei, Taiwan aut Chen Wen-Chuan Orthopaedic Device Research Center, National Yang Ming University, Taipei, Taiwan aut Song Da-Yong Naton Institute of Medical Technology, Beijing, China aut McClean Colin Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut Kao Hao-Yuan School of Biological Science and Medical Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China aut Qu Tie-Bing Department of Orthopaedics, Beijing Chao-Yang Hospital, Affiliated Hospital of Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, 100020, Beijing, China aut Cheng Cheng-Kung Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/11(2015-11-01), 3375-3382 0942-2056 23:11<3375 2015 23 167 https://doi.org/10.1007/s00167-014-3249-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3249-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fang Chao-Hua Department of Joint Surgery, The 6th Hospital of Ningbo, Ningbo, Zhejiang, China aut NATIONALLICENCE 700 1- Chang Chia-Ming Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut NATIONALLICENCE 700 1- Lai Yu-Shu Orthopaedic Device Research Center, National Yang Ming University, Taipei, Taiwan aut NATIONALLICENCE 700 1- Chen Wen-Chuan Orthopaedic Device Research Center, National Yang Ming University, Taipei, Taiwan aut NATIONALLICENCE 700 1- Song Da-Yong Naton Institute of Medical Technology, Beijing, China aut NATIONALLICENCE 700 1- McClean Colin Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut NATIONALLICENCE 700 1- Kao Hao-Yuan School of Biological Science and Medical Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China aut NATIONALLICENCE 700 1- Qu Tie-Bing Department of Orthopaedics, Beijing Chao-Yang Hospital, Affiliated Hospital of Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, 100020, Beijing, China aut NATIONALLICENCE 700 1- Cheng Cheng-Kung Department of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/11(2015-11-01), 3375-3382 0942-2056 23:11<3375 2015 23 167