TY - JOUR
T1 - Effects of interference assembly of a tibial insert on the tibiofemoral contact mechanics in total knee replacement
AU - Chen, Zhenxian
AU - Zhang, Jing
AU - Gao, Yongchang
AU - Chen, Shibin
AU - Zhang, Xuan
AU - Jin, Zhongmin
N1 - Publisher Copyright:
© IMechE 2019.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Tibial locking mechanism design is adopted to limit the backside micromotion in fixed-bearing total knee replacement. However, the effect of the interference assembly of a tibial insert on the tibiofemoral contact mechanics was usually ignored. Finite element model of a fixed-bearing total knee replacement with full peripheral locking mechanism was established to simulate the interference assembly of the tibial insert, and the corresponding effects on the tibiofemoral contact mechanics were predicted. Due to the interference assembly of the tibial insert, a maximum Mises stress of 3.24 MPa was found for the tibial insert before loading. Furthermore, the contact stress was increased by 8.77%, and the contact area was decreased by 5.43% under peak load. The interference assembly of the tibial insert in a fixed-bearing total knee replacement changed the tibiofemoral contact mechanics. This study indicated that the level of interference fit should be cautiously designed for the tibial locking mechanism in fixed-bearing total knee replacement for balancing the articular surface wear and the backside wear of the modular tibial insert.
AB - Tibial locking mechanism design is adopted to limit the backside micromotion in fixed-bearing total knee replacement. However, the effect of the interference assembly of a tibial insert on the tibiofemoral contact mechanics was usually ignored. Finite element model of a fixed-bearing total knee replacement with full peripheral locking mechanism was established to simulate the interference assembly of the tibial insert, and the corresponding effects on the tibiofemoral contact mechanics were predicted. Due to the interference assembly of the tibial insert, a maximum Mises stress of 3.24 MPa was found for the tibial insert before loading. Furthermore, the contact stress was increased by 8.77%, and the contact area was decreased by 5.43% under peak load. The interference assembly of the tibial insert in a fixed-bearing total knee replacement changed the tibiofemoral contact mechanics. This study indicated that the level of interference fit should be cautiously designed for the tibial locking mechanism in fixed-bearing total knee replacement for balancing the articular surface wear and the backside wear of the modular tibial insert.
KW - Contact mechanics
KW - finite element analysis
KW - interference assembly
KW - tibial locking mechanism design
KW - total knee replacement
UR - https://www.scopus.com/pages/publications/85068333119
U2 - 10.1177/0954411919859905
DO - 10.1177/0954411919859905
M3 - 文章
C2 - 31234760
AN - SCOPUS:85068333119
SN - 0954-4119
VL - 233
SP - 948
EP - 953
JO - Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
JF - Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
IS - 9
ER -