OBJECTIVES: To investigate the quality of the life and physical functioning after total knee replacement and to compare the results with individuals who have no knee prosthesis.

METHODS: Subject number: 40 participants were involved. In our research, the quality of life in both groups was measured by SF-36 questionnaire. In addition, we studied muscle strength, active extension, flexion and passive flexion as well. Test sites: the tests were performed in the patients' home, following preliminary consultation in 2018. Trial: Two-sample t-test, two-sample f-test, standard deviation, average. The significance level was 0.05. Statistical software: Microsoft Office Excel 2016 was used.

RESULTS: In all 8 dimensions in SF-36 questionnaire, at the significance level of 0.05, the standard deviations were the same based on the f-tests, and by performing the two-sample t-test, for 6 dimensions, the expected value was the same at the given significance level. In case of knee joint active flexion (97.25° and 96.45°) passive flexion (105.5° and 110,2°), active extension (-2° and -2.2°) and muscle strength (4.15 and 4), agreement could be detected at the given significance level between the results of the two groups.

CONCLUSIONS: Patients with total knee replacement have similar physical functioning 6-12 months after surgery compared to those people in their age group who had no knee replacement surgery. In terms of quality of life, this finding can be made in the 6 dimensions of the SF-36 questionnaire, thus similar values can be achieved.