The Effect of Tibial Posterior Slope on Contact Force and Ligaments Stresses in Posterior-Stabilized Total Knee Arthroplasty-Explicit Finite Element Analysis
- Author:
Hwa Yong LEE
1
;
Sung Jae KIM
;
Kyoung Tak KANG
;
Sung Hwan KIM
;
Kwan Kyu PARK
Author Information
1. Brain Korea 21 Project for Medical Science, Seoul, Korea. sungjaekim@yuhs.ac
- Publication Type:Original Article
- Keywords:
Total knee arthroplasty;
Tibial posterior slope;
Contact force;
Finite element method
- MeSH:
Arthroplasty;
Arthroscopy;
Collateral Ligaments;
Finite Element Analysis;
Gait;
Knee;
Ligaments;
Molecular Weight;
Polyethylene;
Polyethylenes;
Translations
- From:The Journal of Korean Knee Society
2012;24(2):91-98
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: The purpose of this study is to evaluate the effect of change in tibial posterior slope on contact force and ligament stress using finite element analysis. MATERIALS AND METHODS: A 3-dimensional finite element model for total knee arthroplasty was developed by using a computed tomography scan. For validation, the tibial translations were compared with previous studies. The finite element analysis was conducted under the standard gait cycle, and contact force on ultra-high molecular weight polyethylene (UHMWPE) and stresses on lateral and medial collateral ligaments were evaluated. RESULTS: The tibial translations showed similarity with previous studies. As the tibial posterior slope angle increases, the contact stress area increased and was well distributed, and the contact force on UHMWPE decreased overall. However, the maximum contact force in the case for 10degrees case was greater than those for others. The stresses on ligaments were the greatest and smallest in 0degrees and 10degrees cases, respectively. CONCLUSIONS: The higher tibial posterior slope angle leads to the lower contact stress and more extensive stress distribution overall in posterior-stabilized total knee arthroscopy. However, it does not absolutely mean the smallest contact force. The stresses on ligaments increased with respect to the smaller tibial posterior slope angle.
