Quadriceps force after TKA with femoral single radius
| Autor: | Sven Ostermeier, Christina Stukenborg-Colsman |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty business.industry General Medicine Kinematics Radius musculoskeletal system Total knee Surgery Hydraulic cylinder medicine.anatomical_structure Patient age medicine Orthopedics and Sports Medicine Single radius Quadriceps tendon Implant business Biomedical engineering |
| Zdroj: | Acta Orthopaedica. 82:339-343 |
| ISSN: | 1745-3682 1745-3674 |
| Popis: | Background and purpose New implant designs have incorporated a single radius instead of a multiple radius to the femoral component in order to improve the mechanical function after TKA. We investigated the amount of quadriceps force required to extend the knee during an isokinetic extension cycle of different total knee designs, focusing on the radius of the femoral component (single vs. multiple). Methods Human knee specimens (n = 12, median patient age 68 (63–70) years) were tested in a kinematic knee-simulating machine untreated and after implantation of 2 types of knee prosthesis systems, one with a single femoral radius design and one with a multiple femoral radius design. During the test cycle, a hydraulic cylinder, which simulated the quadriceps muscle, applied sufficient force to the quadriceps tendon to produce a constant extension moment of 31 Nm. The quadriceps extension force was measured from 120° to full knee extension. Results The shape of the quadriceps force curve was typically sinusoidal... |
| Databáze: | OpenAIRE |
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