Abstract
The effect of a valgus knee brace and a lateral wedged insole on knee and ankle kinematics and kinetics was evaluated in ten patients with medial knee osteoarthritis (OA). The knee orthosis was tested in two valgus adjustments (4° and 8°), and the laterally wedged insole was fabricated with an inclination of 4°. A motion capture system and force platforms were used for data collection and joint moments were calculated using inverse dynamics. The valgus moment applied by the orthosis was also measured using a strain gauge implemented in the orthosis' rotational axis. For the second peak knee adduction moment, decreases of 18%, 21%, and 7% were observed between baseline and test conditions for the orthosis in 4° valgus, in 8° valgus, and insole, respectively. Similar decreases were observed for knee lever arm in the frontal plane. Knee adduction angular impulse decreased 14%, 18%, and 7% from baseline to conditions for the orthosis in 4° valgus, in 8° valgus, and insole, respectively. Knee angle in the frontal plane reached a more valgus position during gait using the valgus knee brace. The valgus moment applied by the orthosis with 8° valgus adjustment was 30% higher than with 4° valgus adjustment. The valgus knee orthosis was more effective than the laterally wedged insole in reducing knee adduction moment in patients with medial knee OA.
Original language | English |
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Journal | Journal of orthopaedic research : official publication of the Orthopaedic Research Society |
Volume | 30 |
Issue number | 7 |
Pages (from-to) | 1125-1132 |
Number of pages | 8 |
DOIs | |
Publication status | Published - 01.07.2012 |
Research areas and keywords
- Aged
- Ankle Joint
- Biomechanical Phenomena
- Braces
- Female
- Genu Valgum
- Humans
- Kinetics
- Knee Joint
- Male
- Middle Aged
- Movement
- Osteoarthritis, Knee
- Shoes