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Related Experiment Videos

[Muscle biomechanics in total ankle replacement].

V Valderrabano1, B Hintermann, V von Tscharner

  • 1Orthopädische Universitätsklinik, Universitätsspital Basel, 4031, Basel, Schweiz. vvalderrabano@uhbs.ch

Der Orthopade
|March 31, 2006
PubMed
Summary

Total ankle replacement (TAR) significantly improves pain, function, and torque in patients one year post-surgery. However, muscle function in TAR patients does not fully recover to the level of a healthy leg.

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Area of Science:

  • Orthopaedic Surgery
  • Biomechanics
  • Musculoskeletal Research

Context:

  • Ankle osteoarthritis (OA) significantly impairs quality of life and mobility.
  • Total ankle replacement (TAR) is a surgical option for end-stage ankle OA.
  • Evaluating post-surgical muscle function is crucial for assessing TAR outcomes.

Purpose:

  • To assess and compare muscle function in total ankle replacement (TAR) patients one year after surgery.
  • To evaluate clinical outcomes including pain, ankle scores, and range of motion (ROM).
  • To perform biomechanical analysis of lower leg muscle torque and electromyography (EMG) activity.

Summary:

  • Clinical assessments showed significant improvements in pain scores (6.7 to 0.8), AOFAS ankle scores (35.6 to 92.3), and ROM one year post-TAR.

Related Experiment Videos

  • Biomechanical analysis revealed significant increases in dorsiflexion (17.0 to 25.8 Nm) and plantar flexion torque (15.7 to 24.6 Nm) in the TAR-treated ankle.
  • While muscle function improved compared to pre-operative arthritic conditions, EMG analysis indicated lower frequency content and similar intensity to the contralateral healthy leg, suggesting incomplete functional recovery.

    • Impact:

    • Total ankle replacement enhances muscle function and clinical outcomes in ankle OA patients compared to their pre-operative state.
    • The study highlights that despite significant improvements, full functional recovery to healthy leg levels is not achieved one year after TAR.
    • Findings provide valuable insights for patient expectations and rehabilitation strategies following total ankle replacement.