Effect of sagittal femoral component alignment on biomechanics after mobile-bearing total knee arthroplasty

Journal of Orthopaedic Surgery and Research

卷:14

Kyoung-Tak Kang¹  Hwa-Yong Lee¹  Jin-Ah Lee¹  Hyo-Jeong Kim²  Dong-Suk Suh³  Yong-Gon Koh³ 

[1] Department of Mechanical Engineering, Yonsei University;

[2] Department of Sport and Healthy Aging, Korea National Sport University;

[3] Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital;

关键词: Total knee arthroplasty;    Mobile-bearing;    Malalignment;    Finite element analysis;   

DOI  :  10.1186/s13018-019-1458-5

来源: DOAJ

【 摘 要 】

Abstract Background Recently, there has been increasing interest in mobile-bearing total knee arthroplasty (TKA). However, changes in biomechanics with respect to femoral component alignment in mobile-bearing TKA have not been explored in depth. This study aims to evaluate the biomechanical effect of sagittal alignment of the femoral component in mobile-bearing TKA. Methods We developed femoral sagittal alignment models with − 3°, 0°, 3°, 5°, and 7°. We also examined the kinematics of the tibiofemoral (TF) joint, contact point on the TF joint, contact stress on the patellofemoral (PF) joint, collateral ligament force, and quadriceps force using a validated computational model under a deep-knee-bend condition. Results Posterior kinematics of the TF joint increased as the femoral component flexed. In addition, contact stress on the PF joint, collateral ligament force, and quadriceps force decreased as the femoral component flexed. The results of this study can assist surgeons in assessing risk factors associated with femoral component sagittal alignment for mobile-bearing TKA. Conclusions Our results showed that slight flexion implantation may be an effective alternative technique because of its advantageous biomechanical effect. However, excessive flexion should be avoided because of potential loosening of the TF joint.

【 授权许可】

Unknown