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THU0201 Biomechanical and Functional Benefits during GAIT of A New Knee Brace That Combines A Valgus and Tibial External Rotation Effect in Medial Osteoarthritis Patients

Background Non-pharmacological therapies are recommended for the care of knee osteoarthritis patients. Unloader knee braces provide an interesting functional approach, which aims to modulate the mechanical stress on the symptomatic joint compartment. We aimed to confirm the biomechanical effects and evaluate functional benefits of a new knee brace that combines a valgus effect with knee and tibial external rotation during gait in medial osteoarthritis patients. Methods 20 patients with unilateral symptomatic medial knee osteoarthritis were included and performed two test sessions of 3D gait analysis with and without the brace at the initial evaluation (W0) and after 5 weeks (W5) of wearing the brace. VAS-Pain, Satisfaction scores, WOMAC scores, spatio-temporal gait parameters (gait speed, stride length, stance and double stance phase, step width), biomechanical data of the ipsilateral lower limb (hip, knee ankle and foot progression angle) were recorded at each session Results VAS-pain and WOMAC significantly decreased at W5. Walking speed was not significantly modified by knee bracing at W0, but increased significantly at W5. Knee adduction moments and foot progression angles significantly decreased in the terminal stance and push off, respectively, with bracing at W0 and W5. Lower-limb joint angles, moments and powers were significantly modified by wearing the brace at W0 and W5. Conclusions This new knee brace with distraction-rotation effects significantly alters knee adduction moments and foot progression angles during gait, which might lead to significant functional gait improvements and have carry-over effects on pain at the short term in osteoarthritis patients (<2 months). Disclosure of Interest : None declared DOI 10.1136/annrheumdis-2014-eular.1930