To evaluate how the static and dynamic plantar overload distribution patterns change following total knee arthroplasty
(TKA) surgery using a pressure platform. Ten patients who met the inclusion criteria were included (mean age 68.5±7.9 years).
Evaluations were performed prior to the surgery and on the 15th day after the surgery. Static balance parameters (anterior-posterior
and total load distribution of the foot, ratio of weight bearing of the right and left foot, elliptic area of the pressure center and
oscillation speed) were measured and recorded by Zebris™ FDM-2 (Zebris® Medical GmbH, Germany) device. Maximum
strength produced in the posterior foot during walking, time percent of the walking cycle produced by this strength and middle foot
maximum pressure values were found to be significantly decreased (p<0,05). Rotation degrees of the foot were found to be
decreased in the patients, though not statistically significant. No significant differences were found in the total weight load on the
foot, elliptic area, center of pressure (COP), line length and mean COP rate during static standing between the pre-surgical and postsurgical measurement results (p>0,05). Weight load measurement values on the forefoot of the opere side during standing were
found to be significantly increased following surgery, while the weight load on the rear foot was found to be significantly decreased
(p<0,05). The weight load on the rear foot and forefoot upon static stance was decreased and increased, respectively 15 days after
the surgery in patients who underwent TKA surgery. The evaluations using force platform before and after surgery may be useful
for orthopedic surgeons because TKA surgery used to correct knee alignment also affect loading parameters in early period.
Key Words: foot; gait analysis; knee osteoarthritis; pedobarography; total knee arthroplasty