[Valid constructing method of three-dimensional finite element human foot model and experimental analysis on its...

Area of Science:

• Biomechanics
• Computational modeling
• Orthopedics

Background:

• Accurate simulation of foot-ankle biomechanics is crucial for research and clinical applications.
• Existing models may lack sufficient anatomical detail or validation.

Purpose of the Study:

• To develop and validate a 3-D finite element model for foot-ankle biomechanics research.
• To create a digital simulation platform that enhances clinical applicability.

Main Methods:

• Established a 3-D finite element model using helical CT images and reverse engineering principles.
• Modeled anatomical structures including cartilage, ligaments, tendons, and plantar soft tissue.
• Validated the model using cadaveric specimens and digital speckle correlation method (DSCM) for displacement measurement.

Main Results:

• The developed 3-D finite element model accurately replicated foot-ankle anatomy and physiological states.
• Model validation through cadaveric experiments confirmed its reliability.
• A refined model with plantar fascia linked to metatarsal heads demonstrated improved clinical relevance.

Conclusions:

• The validated 3-D finite element model provides a robust platform for foot-ankle biomechanics research.
• The model's enhanced anatomical representation and validated performance support its clinical application.
• Linking the plantar fascia to metatarsal heads improves the model's clinical applicability.