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Interaction between active and passive knee stabilizers during level walking.

O D Schipplein1, T P Andriacchi

  • 1Rush-Presbyterian-St. Luke's Medical Center, Department of Orthopedic Surgery, Chicago, Illinois 60612.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|January 1, 1991
PubMed
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Patients with knee varus deformities alter their gait to enhance knee stability. Increased muscle force in their walking style helps resist knee joint opening, maintaining equilibrium.

Area of Science:

  • Biomechanics
  • Orthopedics
  • Kinesiology

Background:

  • Lateral knee stability is crucial for normal gait.
  • Varus deformities can compromise knee stability.
  • Understanding the interplay of muscular and passive restraints is key.

Purpose of the Study:

  • To analyze the dynamic and passive restraints affecting lateral knee stability.
  • To investigate gait adaptations in patients with knee varus deformities.
  • To model the effects of gait on knee joint opening.

Main Methods:

  • Statistical modeling of gait dynamics.
  • Analysis of muscular and ligamentous restraints.
  • Comparison of gait patterns between normal subjects and patients with varus deformities.

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Main Results:

  • A predictive model indicated potential for lateral knee joint opening during normal gait without adequate muscle or ligamentous support.
  • Patients with varus deformities exhibited gait modifications characterized by increased muscle force (flexion-extension moments).
  • These gait adaptations were associated with a reduced likelihood of lateral knee joint opening.

Conclusions:

  • Altered gait patterns in patients with knee varus deformities may serve to enhance knee stability.
  • Increased muscular force during gait appears to counteract the adducting moment, promoting lateral joint closure.
  • This compensatory gait strategy likely contributes to maintaining overall knee equilibrium and stability.