An anatomical subject-specific FE-model for hip fracture load prediction

Area of Science:

• Biomechanics
• Orthopedics
• Computational Modeling

Background:

• Osteoporotic hip fractures impose a significant socio-economic burden.
• Finite element models (FE-models) show potential as diagnostic tools for fracture prediction.
• Optimizing the balance between model relevance and computational efficiency is crucial for clinical application.

Purpose of the Study:

• To develop and validate a subject-specific FE-model for hip fracture prediction.
• To utilize an original parameterized generic model and a specific personalization method.
• To assess the model's accuracy and computational efficiency for potential clinical use.

Main Methods:

• Generated subject-specific FE-models from 39 human femurs tested to failure.
• Used quasi-static compression in a stance configuration for experimental testing.
• Compared numerical fracture load (FFEM) with experimental fracture load (FEXP) for validation.

Main Results:

• A significant correlation was found between experimental and numerical fracture loads (FEXP = 1.006 FFEM, r² = 0.87, SEE = 1220 N, p < 0.05).
• The FE-model achieved validation with a reasonable computing time of approximately 30 minutes.
• The model demonstrated high accuracy in predicting experimental fracture loads.

Conclusions:

• The developed subject-specific FE-model accurately predicts hip fracture loads.
• The model offers a viable compromise between predictive accuracy and computational time.
• Further in vivo studies are recommended to confirm its clinical utility in fracture risk assessment.