Development of a biomechanical model for dynamic occlusal stress analysis

Area of Science:

• Biomechanical Engineering
• Dental Mechanics
• Computational Modeling

Background:

• Traditional finite element method (FEM) analysis for occlusal stress is limited by complex musculature simulation.
• Accurate prediction of dynamic occlusal stress is crucial for understanding dental biomechanics and treatment planning.

Purpose of the Study:

• To develop a novel displacement boundary condition-finite element method (DBC-FEM) for predicting dynamic occlusal stress, bypassing the need for muscle simulation.
• To validate the DBC-FEM's accuracy using electrognathography, video recording, and the T-Scan Occlusal System.

Main Methods:

• Developed DBC-FEM geometry from scanned dental casts of a volunteer.
• Utilized electrognathographic and video data for jaw positional analysis.
• Performed virtual occlusion modifications using carving tool software and validated with T-Scan data.

Main Results:

• DBC-FEM accurately predicted dynamic changes in dental surface stress distribution correlating with occlusal contacts.
• Simulated results aligned with T-Scan recordings, showing higher stress on right-side molars.
• Virtual modifications demonstrated the potential to reduce simulated stress at specific sites.

Conclusions:

• The developed DBC-FEM provides a creative and pragmatic approach for predicting occlusal stress.
• This method offers a simplified yet effective alternative for dynamic occlusal stress analysis in dentistry.
• The findings support the use of DBC-FEM for evaluating and improving occlusal morphology.