Knee flexion after total knee arthroplasty

PH Li, YC Wong, YL Wai
Department of Orthopaedics and Traumatology, Yan Chai Hospital, Hong Kong

PURPOSE. To identify factors related to knee flexion
after total knee arthroplasty in a Chinese population.

METHODS. Records of 242 total knee arthroplasties
were retrospectively reviewed. The parameters
evaluated were age, gender, diagnosis, preoperative
knee flexion and extension, preoperative flexion
arc, tibiofemoral angle, Knee Society knee score and
functional score, and implant design.

RESULTS. Advanced age, female gender, and good
preoperative flexion and flexion arc were related to
better postoperative flexion. Postoperative flexion
tended to migrate to the middle range despite
different ranges of preoperative flexion. Preoperative
tibiofemoral malalignment had no significant effect
on postoperative flexion.

CONCLUSION. Contemporary designs of posterior
stabilised prostheses with right and left femoral
components were superior to older designs.