| Summary: | Objective: To evaluate the differences on postural stability computerized evaluation (PSCE) between patients before and after total knee arthroplasty (TKA), and how post-TKA patients' characteristics may correlate with their performance on PSCE. Design: Two groups were compared. Group A: patients with knee osteoarthrosis (KOA) and primary TKA surgery scheduled; Group B: patients who underwent primary TKA >9 months before. We evaluated sociodemographic, radiographic, clinical and PSCE parameters (using the Biodex Balance System). Results: Post-TKA patients placed more load on the operated knee rather than on the contralateral osteoarthritic knee on the Percentage Weight Bearing test; they had less imbalance on the open eyes' conditions of the modified Clinical Test of Sensory Interaction and Balance; and they had better postural stability in monopodalic stance, regardless of the standing limb, on the ML axis of the Bilateral Comparison test. Age, weight, pain on the operated knee, extension deficit on the operated knee and Berg Balance Scale scores on post-TKA patients correlated with their performance on some PSCE tests. Conclusion: PSCE can quantify the improvement of balance on post-TKA patients. Some clinical characteristics can relate with their performance in PSCE tests.
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