Flexion vs. extension: a comparison of post-operative total knee arthroplasty mobilisation regimes

Abstract We report a prospective trial comparing the effectiveness of a post-operative flexion regime versus a standard extension regime on the early outcome of total knee arthroplasty. A total of 160 knees were allocated to two separate post-operative mobilisation regimes: a static flexion regime or an active extension regime. Patients were implanted with either an IBII or 913 total knee replacement systems. All operations were performed by the same surgeon. Patients were assessed pre-operatively and at 6 weeks, and were well matched with respect to age, sex, diagnosis and pre-op movement. Patients subjected to the flexion regime had a better maximum flexion and range of movement at 6 weeks and were also discharged earlier. These results were statistically significant ( P