The locomotor system state before and after surgical treatment of patients with patellar dysplastic dislocation

Purpose. To study femoral muscle state and walking biomechanics before and after treatment in order to predict rehabilitation of patients with patellar dislocation of different severity. Material and Methods. Physiological examination (dynamometry of femoral muscles, and determination of feet support response) performed in 29 patients at the age of 12-46 years with unilateral patellar dysplastic dislocation and in 12 patients (age: 10-42 years) - with bilateral one before and after surgical treatment. Results. As it has been shown, “maximally accelerated walking pace” functional test revealing compensatory supporting responses of foot is of diagnostic significance in patients with unilateral involvement. As for patients with bilateral dysplastic process, the manifestation and the number of compensatory response types in locomotor stereotype indirectly reflect the severity of the involvement. Statistically significant asymmetry of leg extensor strength revealed both before treatment and during follow-up examinations after treatment. Muscle strength of the involved limb was on the average 61% decreased before treatment, and 29% decreased - after treatment. The parameters of limb functional state equalized approaching the level of values in normal subjects two years after surgical treatment. Conclusion. Studying muscle functional state and walking biomechanics allows more efficient approach to rehabilitation process of patients with patellar dysplastic dislocation.