Article

This study aims at defining gait pathomechanics in patients with hip
osteoarthritis (OA) and their effect on hip joint loading by combining analyses
of hip kinematics, kinetics and contact forces during gait.
Twenty patients with
hip OA and 17 healthy volunteers matched for age and BMI performed
three-dimensional gait analysis. Hip OA level was evaluated based on plane
radiographs using the Tonnis classification. Hip joint kinematics, kinetics as
well as hip contact forces were calculated. Waveforms were time normalized and
compared between groups using statistical parametric mapping analysis. Patients
walked with reduced hip adduction angle and reduced hip abduction and external
rotation moments. The work generated by the hip abductors during the stance phase
of gait was largely decreased. These changes resulted in a decrease and a more
vertical and anterior orientation of the hip contact forces compared to healthy
controls. This study documents alterations in hip kinematics and kinetics
resulting in decreased hip loading in patients with hip OA. The results suggested
that patients altered their gait to increase medio-lateral stability, thereby
decreasing demand on the hip abductors. These findings support discharge of
abductor muscles that may bear clinical relevance of tailored rehabilitation
targeting hip abductor muscles strengthening and gait retraining.
CI - Copyright (c) 2017 Elsevier B.V. All rights reserved.

Langue : ANGLAIS