| Autor: |
Zhenxian, Chen, Ling, Wang, Yaxiong, Liu, Jiankang, He, Qin, Lian, Dichen, Li, Zhongmin, Jin |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Journal of orthopaedic research : official publication of the Orthopaedic Research Society. 33(9) |
| ISSN: |
1554-527X |
| Popis: |
Mal-rotation of the components in total knee arthorplasty (TKA) is a major cause of postoperative complications, with an increased propensity for implant loosening or wear leading to revision. A musculoskeletal multi-body dynamics model was used to perform a parametric study of the effects of the rotational mal-alignments in TKA on the knee loading under a simulated walking gait. The knee contact forces were found to be more sensitive to variations in the varus-valgus rotation of both the tibial and the femoral components and the internal-external rotation of the femoral component in TKA. The varus-valgus mal-rotation of the tibial or femoral component and the internal-external mal-rotation of the femoral component with a 5° variation were found to affect the peak medial contact force by 17.8-53.1%, the peak lateral contact force by 35.0-88.4% and the peak total contact force by 5.2-18.7%. Our findings support the clinical observations that a greater than 3° internal mal-rotation of the femoral component may lead to unsatisfactory pain levels and a greater than 3° varus mal-rotation of the tibial component may lead to medial bone collapse. These findings determined the quantitative effects of the mal-rotation of the components in TKA on the contact load. The effect of such mal-rotation of the components of TKA on the kinematics would be further addressed in future studies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Plný text