Maxillary expansion in customized finite element method models.

Area of Science:

• Craniofacial biomechanics
• Finite element analysis
• Orthodontic research

Background:

• Developing accurate 3D finite-element models (FEM) of the maxilla is crucial for understanding craniofacial development and treatment responses.
• Evaluating the impact of transverse expansion on midpalatal suture status requires sophisticated modeling techniques.

Purpose of the Study:

• To create a 3D FEM of the maxilla for analyzing transverse expansion effects.
• To assess how different midpalatal suture statuses influence biomechanical responses during expansion.

Main Methods:

• A 3D FEM of the craniofacial complex was constructed using CT images and specialized software.
• Transverse expansion forces were simulated on three models: solid (no suture), fused (suture elements), and patent (no suture).

Main Results:

• The fused model showed stress patterns similar to the solid model, with reduced stress near the incisive foramen.
• The patent model exhibited distinct stress patterns, shifting superiorly to the nasal area.
• Anterior nasal spine and incisor movement varied across models, with downward and backward displacement observed.

Conclusions:

• The FEM effectively simulates clinical observations of maxillary expansion, correlating suture status with outcomes.
• This customizable FEM provides a predictive tool for patient-specific craniofacial responses to biomechanical interventions.