The Influence of Total Knee Arthroplasty on Body Balance of Knee Osteoarthritis Patients

Abstract：Objective To assess the body balance changes induced by the total knee arthroplasty procedure in knee osteo-arthritis patient's postural control( OA),and explore the relationship between changing of body balance and recover of the knee's function. Methods Twenty-one patients with single osteoarthritis knee who underwent TKA at our department from January 2011 to December 2013 were analyzed(12 consecutive patients underwent right TKA,and 9 consecutive patients un-derwent left TKA). The measurements were performed using the corresponding instrument and three consecutive double-limb standing balance trials were complated. The Medio-lateral,antero-posterior displacements and Locus length of GCP(LG)in u-nit-time were analyed. Correlation analysis between changing degree of them and degree of changing HSS score were analyzed. Results The mean GCP in the medio-lateral direction shifted to the operative side in both groups after surgery. There was a direct linear relationship between shifting degree of GCP in the medio-lateral direction and degree of changing HSS score at the same period after the surgery. There was a poor relationship between shifting degree of GCP in the antero-posterior direction and degree of changing HSS score. Conclusion The body balance of patients can be significantly improved after TKA. There is a direct linear relationship between improving degree of body balance in the medio-lateral direction and degree of changing HSS score at the same period after the surgery.