Comparison of range of motion after standard and high-flexion posterior stabilised total knee replacementNg, F.Y., Wong, H.L., Yau, W.P. et al.
The purpose of this study was to compare the range of motion after standard version posterior stabilised TKR and high-flexion version TKR in patients receiving bilateral total knee replacement. Thirty-five patients were recruited. The range of motion of the knees was measured clinically with a goniometer in both the pre-operative period and the most recent follow-up. It was found that the pre-operative range of motion was comparable in the two groups. The average post-operative flexion was 105° ± 13° in the standard version group and 106° ± 14° in the high-flexion design group (p = 0.201, paired t-test; beta error = 0.073). A slight loss in flexion was observed in the standard version group (0.5°) as opposed to a slight gain in the high-flexion design group (2°). However, this was not statistically significant (p = 0.251, paired t-test; beta error = 0.105).