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Purpose: The aim of the present study was to investigate the difference in dynamic plantar pressure distribution changes in patients with degenerative knee arthrosis before and eight months after total knee arthroplasty (TKA) surgery. Materials and Methods: Patients with end stage gonarthrosis admitted to our clinic for TKA constituted the study group. An EMED SF-4 pressure sensitive platform was used to quantify the barefoot plantar pressures of the participants’ feet. Stance phase duration (ms), total plantar pressure (N/cm2) and centre of pressure (CoP) patterns during gait were recorded preoperatively and at 8th months postoperatively. Results: Fifteen knees of 13 patients who underwent primary TKA were included in the study. Stance phase durations in the pre- and postoperative periods were 987 ms and 801.5 ms, respectively. Total plantar pressures in the pre- and postoperative periods were 1257.75 N/cm2 and 1436.0 N/cm2, respectively. The difference in mediolateral plantar area was 0.69% in favor of lateral side of feet in the preoperative period and changed to 5.17% in favor of medial. Conclusion: For the surgical realignment of the knee, the kinematic chain of the lower extremity must be considered, and gait analysis will be helpful in deciding the type of surgical treatment.

Gait analysis after total knee arthroplasty: comparison of pre- and postoperative characteristics