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

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.