This study aimed to evaluate functional biomechanics in patients who undergo total knee arthroplasty (TKA).
METHODS:
Lower limb joint kinematics and kinetics were evaluated in 25 TKA patients at 3 months following TKA and 25 age-matched controls after 12 months following TKA. Participants were evaluated in a gait laboratory, with self-selected gait speed.
RESULTS:
Experimental group walked significantly slower (p < 0.01), using a shorter stride length (p < 0.01), compared to those for the controls. The experimental group exhibited significantly greater knee motion, lower knee extension moment (p < 0.01), and lower peak power generation (p < 0.01) compared to those for the control group. Additionally, the TKA group showed significantly smaller peak ankle motion (p < 0.01), lower ankle dorsiflexion moments (p < 0.05), and ankle power generation (p < 0.01) compared to those for the control group.
DISCUSSION:
These biomechanical properties of gait in the experimental group may be a compensatory response to lesser recovered knee function to allow sufficient power generation for propulsion. Therefore, rehabilitative strategies at 3 months following TKA are needed to improve not only knee function but also hip and ankle function after TKA.
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