Abstract
BackgroundTotal hip replacement (THR) is a procedure which can improve the quality of life in patients with osteoarthritis. However, deficits in static stability and impairment of lower limb efficiency can be observed even several months after the procedure. The aim of this study was to investigate the static balance of the standing position in patients treated by THR.MethodsThe study included 30 THR patients and 30 healthy subjects. The subjects were examined once. A Metitur balance platform and a one-leg standing (OLS) test were used to assess the static balance. The tests on the balance platform were performed in several positions with different foot placement, such as normal standing, eyes open (NS EO) and eyes closed (NS EC) positions, tandem position (TP), the second form of tandem position (2TP) and one-leg standing position (1 L).ResultsSignificant imbalance in the sagittal plane during normal standing EO and EC positions were found in the THR group. No significant differences in the measured parameters were found during tests in tandem, the second form of tandem and one-leg standing positions in the groups. The mean time of standing on the operated limb in the THR group during the OLS test was significantly shorter than that in the control group.ConclusionsDeficits in static balance may occur in THR patients even a long time after the procedure. The test performed in the NS position is sufficient to assess the balance. The rehabilitation protocols currently used after THR should include postural stability exercises.Trial registration numberTrial registry: NCT03218267. 12 July 2017 (retrospectively registered).
Highlights
Total hip replacement (THR) is a procedure which can improve the quality of life in patients with osteoarthritis
Hip pain occurred in 4 patients after THR (2 patients reported pain in both legs, and 2 patients reported pain in the non-operated leg) and 2 subjects in the control group
The pain level was below 3 points, and it did not have a significant effect on the results of the study
Summary
Total hip replacement (THR) is a procedure which can improve the quality of life in patients with osteoarthritis. The aim of this study was to investigate the static balance of the standing position in patients treated by THR. Chronic pain and limitations of physical activity in patients with osteoarthritis of the hip result in the worsening of proprioception, asymmetric limb loading and resulting dynamic balance disorders [5,6,7]. Deficits in muscle strength and the restricted range of movement in Several authors had compared the physical functionality of patients with hip joint osteoarthritis before and after THR and reported improvement [12, 13] which was Wareńczak and Lisiński BMC Musculoskeletal Disorders (2019) 20:229 associated with decreased pain intensity, improved lower limb functionality and significant improvement in the quality of life. Proske and Gandevia [7] note that the sense of position and movement after the procedure has not changed
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