Abstract
Total knee replacement is a surgical procedure for treatment of knee Osteoarthritis, Rheumatoid arthritis and posttraumatic arthritis. The main goals of TKR are relieve the pain, restore function, mobility and restore normal limb alignment for the patients. The aim of the study to investigate the gait dynamic improvements following TKR surgery by compare the dynamic parameter pre-operative and post-operative and then comparing the results with the normal gait parameters. The gait analysis was performed on five patients before and after they underwent unilateral TKR surgery. After three months from the total knee replacement there was a remarked increase in the function and decrease in pain. The varus and valgus malalignment will be return to normal alignment after operation, which is one of the main goals of the TKR. Post-operative cadence is higher than pre-operative for four patients, post-operative speed is faster than pre-operative for four patients and post-operative stride length is larger than pre-operative for four patients. The patients continue to walk with significant gait abnormalities by examining the kinetics and the kinematics of the operated limb, the results show the knee function not fully restored three months after unilateraL TKR surgery.
Highlights
Gait analysis is the systematic study of the human walking, which is useful for description normal and pathological locomotion patterns, and suggestion of physiotherapy as well as calculation of the results of such therapy
The dynamic gait parameters improvements not parallel with the clinical improvements because the patients continue to walk with a significant gait abnormalities by examining the kinetics and the kinematics of the operated limb
Gait analysis with a simple system is useful in documenting gait abnormalities before and after total knee replacement (TKR) surgery
Summary
Gait analysis is the systematic study of the human walking, which is useful for description normal and pathological locomotion patterns, and suggestion of physiotherapy as well as calculation of the results of such therapy. The walking process combines complex interactions between bones, muscles, ligaments, tendons and the neurons in the human body. The kinetics describes the motion in term of the forces, moments and powers but without any details about the orientation or position of the objects involved, the kinetics measurements are done by the force platform device which is used for measure ground reaction forces and moments. The joints (hip, knee and ankle) forces, powers, angles and moments are obtained by the inverse dynamics to the data collection from the camera in combined with the force platform and anthropometric data from tables. The knee joint is the largest joint in the human body, thigh and lower leg bones are joined by a complex array of muscles, ligaments, tendons and cartilage, the knee structure permits the bearing of tremendous loads and the mobility required for the locomotors activities.
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