Computer Simulation Modeling of Impact of Lateral Release on Patellar Instability of Dysplastic Origin
Based on created dynamic models of patellofemoral joint with femoral trochlear dysplasia (type A and B), there had been carried out determination of the angular and linear movement of patella, and equivalent by von Mises stresses in the cartilage of the patella at flexion of the knee from 0° to 30° in health, in patellar instability and lateral release in instability, which is accompanied by femoral trochlear dysplasia (type A and B). It is found that when patellar instability stress concentrators are located only on the lateral facet regardless of the type of dysplasia. Type of dysplasia affects the angular and linear movement of the patella, as well as the distribution of equivalent by the von Mises stresses in the patellar cartilage in health and instability. Lateral release reduces the stress on the lateral facet of the patella, but does not normalize the angular and linear movements. Type of femoral trochlear dysplasia affect the distribution of stress and angular and linear movements of patella in lateral release.
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