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A Pilot Validation Study of a Biomechanical Simulation Model for Rotational Ankle Injuries Using Robotic Cadaveric

Mohammad Amin Shayestehpour1,2, Martin G Gregersen3,4, Ola Saatvedt5,6

  • 1Department of Orthopaedic Surgery, Østfold Hospital Trust, Grålum, Norway.

Foot & Ankle Orthopaedics
|August 25, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a validated computer model to simulate deltoid ligament strain during rotational ankle injuries. The model accurately predicts injury progression and ligament behavior, offering new insights into ankle trauma mechanisms.

Keywords:
ankle fracturebiomechanicsdeltoid ligamentsimulation

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Area of Science:

  • Biomechanics
  • Orthopedic Surgery
  • Computational Modeling

Background:

  • Deltoid ligament injuries are linked to rotational ankle trauma.
  • Existing understanding of injury sequences may be incomplete.
  • Computer modeling presents a novel approach to assess ligament behavior.

Purpose of the Study:

  • To develop and validate a biomechanical computer simulation model for rotational ankle injuries.
  • To evaluate ligament strain patterns during simulated injuries.
  • To provide a tool for understanding deltoid ligament biomechanics.

Main Methods:

  • A biomechanical computer model was created using AnyBody Modeling Software.
  • Cadaveric data from 15 human ankle specimens were used for parameter identification.
  • The model simulated Supination-External Rotation (SER) stages 2-4b injuries and was validated against experimental data.

Main Results:

  • The computer model demonstrated high correlation (0.81-0.99) with experimental findings.
  • Progressive tension in the deep posterior tibiotalar ligament (DPTTL) was observed from SER2 to SER4a.
  • The model accurately captured ligament strain progression and medial clear space changes.

Conclusions:

  • An early-stage biomechanical simulation model for rotational ankle injuries has been developed and validated.
  • This model serves as a novel tool for investigating ligament biomechanics and injury mechanisms.
  • The model offers insights beyond cadaveric or clinical studies, aiding hypothesis generation and treatment refinement.