Effect of Bilateral, Severe Knee Osteoarthritis on Balancing Ability after Sudden Unidirectional Perturbation

Ákos Pethes, Gréta Szabó, and Rita M. Kiss


Medical measurement, biomechanics, balancing capacity


The gait parameters, the variability of gait, the balancing ability are influenced by unilateral knee osteoarthritis. The aim of this study is to analyze balancing ability after sudden perturbation characterized Lehr’s damping ratio measured by provocation test stance on both and on single limb at patient with bilateral knee osteoarthritis. 20 controls, 20 patients with unilateral and 20 with bilateral knee osteoarthritis. Balancing ability was characterized by the Lehr’s damping ratio determined by provocation test during double leg and single leg stance. For patients with bilateral knee osteoarthritis, the results of provocation test while standing on both limbs, on dominant and non- dominant limb did not differ significantly each other. No significant difference found between the results of males and females. Our results showed that, the lateral dominance and the gender did not affect the balancing ability, if the knee osteoarthritis is bilateral. Our results showed that the most dominant impact is the severity of osteoarthritis.

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