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Motion analysis after total knee arthroplasty

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The aim of this study is to evaluate the functional performance after total knee replacement (TKR). Two groups of patients, one with mobile (n=9) and one with fixed bearing (n=8) total knee prosthesis, were compared by means of motion analysis. A group of healthy subjects (n=8), matched by age, were used as controls. Kinematics, kinetics and electromyography data were collected during physiological daily activities such as walking and squatting. During walking, both groups of patients showed a speed of progression, a maximum knee extension moment (stance phase) and a maximum knee flexion (swing phase) significantly lower than the control group. Moreover, during the swing phase a co-contraction of the antagonistic muscles of the inferior limb was present. During squatting, both groups of patients showed a peak of knee flexion significantly lower than the control group. Motion pattern after TKR is unphysiological but the abnormalities seem to be independent from the differences in the implant designs.

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Correspondence to Corrado Sosio.

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Sosio, C., Gatti, R., Corti, M. et al. Motion analysis after total knee arthroplasty. Sport Sci Health 4, 1–6 (2008).

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Key words

  • Mobile bearing prosthesis
  • Fixed bearing prosthesis
  • Gait analysis
  • Squat
  • Total knee arthroplasty