| Autor: |
Martin Michael, Wachowski, Christoph, Fiedler, Tim Alexander, Walde, Peter, Balcarek, Jan Philipp, Schüttrumpf, Stephan, Frosch, Karl-Heinz, Frosch, Jochen, Fanghänel, Riccardo, Gezzi, Dietmar, Kubein-Meesenburg, Hans, Nägerl |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Acta of bioengineering and biomechanics. 13(3) |
| ISSN: |
1509-409X |
| Popis: |
Firstly, the way of implementing approximatively the initial rollback of the natural tibiofemoral joint (TFJ) in a total knee replacement (AEQUOS G1 TKR) is discussed. By configuration of the curvatures of the medial and lateral articulating surfaces a cam gear mechanism with positive drive can be installed, which works under force closure of the femoral and tibial surfaces. Briefly the geometric design features in flexion/extension are described and construction-conditioned kinematical and functional properties that arise are discussed. Due to a positive drive of the cam gear under the force closure during the stance phase of gait the articulating surfaces predominantly roll. As a result of rolling, a sliding friction is avoided, thus the resistance to motion is reduced during the stance phase. Secondly, in vivo fluoroscopic measurements of the patella tendon angle during flexion/extension are presented. The patella tendon angle/ knee flexion angle characteristic and the kinematic profile in trend were similar to those observed in the native knee during gait (0°-60°). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
