Role of Good Postoperative flexion angle on Knee Function &
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Total knee arthroplasty (TKA) is a well-established procedure for treating knee joint diseases. The postoperative range of motion (ROM) varies and is an important indicator of TKA success. Recently, patient-reported outcome measures (PROMs) and patient satisfaction have drawn attention.

The data of 375 patients who underwent 500 primary TKA procedures were retrospectively reviewed. The ROM before and after surgery was measured. Knee joint function was evaluated using the Knee Injury Osteoarthritis Outcome Score (KOOS), a PROM, and patients were classified into good function and poor function groups.

Patient satisfaction was evaluated on a 5-graded scale as overall satisfaction, and patients were divided into a satisfied or a dissatisfied group according to the obtained scores. ROM was compared between the two groups, then significantly different factors were analyzed using multiple logistic regression analysis. Moreover, cut-off points of ROM for obtaining good function and patient satisfaction were determined using ROC curve analysis.

Results:
--The postoperative flexion angle had a significant effect on knee function.

--The cut-off value of the postoperative flexion angle for good knee function was 120°. The improvement in flexion angle had a significant effect on patient satisfaction.

--The cut-off value for the improvement of the flexion angle was 5°.

In conclusion, postoperative flexion angle had a significant impact on knee function, and flexion angle change had a significant impact on patient satisfaction.

Source: https://www.sciencedirect.com/science/article/abs/pii/S0883540321004125?dgcid=rss_sd_all
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