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Stress Trajectory Variations During Occlusal Loading in Human Skull with a Maxillofacial Defect: A Finite Element
Pandurangan Harikrishnan1,2, Varadaraju Magesh3
1Department of Orthodontics, Faculty of Dental Sciences, SGT University, Gurugram, Haryana 122505 India.
Journal of Maxillofacial and Oral Surgery
|June 26, 2023
Summary
Maxillofacial defects alter stress distribution in the skull, potentially impacting craniofacial health. Reconstruction is recommended to restore normal stress patterns during biting forces.
Area of Science:
- Biomechanical Engineering
- Craniofacial Anatomy
- Dental Mechanics
Background:
- Biting forces distribute stress through facial bones and skull via stress trajectories.
- Maxillofacial bony defects can alter this stress distribution.
- Understanding these alterations is crucial for craniofacial health.
Purpose of the Study:
- To evaluate stress distribution and stress trajectory variations in a human skull with a maxillofacial defect.
- To analyze the impact of a maxillectomy defect on stress distribution during occlusal loading.
Main Methods:
- A finite element (FE) model was constructed from cone beam computed tomography (CBCT) data of a patient with a maxillectomy defect.
- Occlusal loading forces were applied to the remaining maxillary teeth.
- Stress distribution and trajectories were visualized.
Main Results:
- Deviations in normal stress distribution were observed during occlusal loading.
- Variations in zygomatic and pterygoid stress trajectories were noted in the maxillofacial and skull regions due to the bony defect.
Conclusions:
- Skeletal maxillofacial defects disrupt proper stress distribution during functional forces.
- Reconstruction of these defects is essential to maintain a healthy craniofacial skeleton.
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