Balance a few years after total hip replacement

Abstract Background: The aim of the study was to conduct a long-term evaluation of whether total hip replacement permanently affects the quality of postural reactions and body balance. Material and methods: The unilateral Total Hip Replacement (THR) group consisted of 30 subjects (mean age: 69.4). The control group consisted of 30 healthy subjects (mean age: 68.8). The force platform and functional tests such as Timed Up and Go, 3m walk test, Functional Reach Test, 30s Chair Stand Test, Step Test and Berg Balance Scale were used to assess dynamic balance. Results: Subjects from the study group exhibited significantly increased time (p=0.002) and distance (p=0.012) in the tests performed on the force platform compared to the control group. We also observed worse balance and functional test scores in the THR group: Timed Up and Go test (p<0.001), 3m walk test (p<0.001), Functional Reach Test (p=0.003), 30s Chair Stand Test (p=0.002) and Step Test (operated leg: p<0.001, non-operated leg: p=0.002). The results obtained in the Berg Balance Scale tests were not significantly different between the groups (p=0.597). Conclusions: Our research shows that total hip replacement permanently impairs patients’ dynamic balance and functionality in certain lower-extremity activities. Keywords: balance, total hip replacement, gait, muscle strength