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Strain analysis of maxillary complete denture with three-dimensional finite element method
Yi Y Cheng1, Wai L Cheung, Tak W Chow
1Honorary Research Associate, Faculty of Dentistry, University of Hong Kong, Hong Kong. yycheng@hku.hk <yycheng@hku.hk>
The Journal of Prosthetic Dentistry
|April 27, 2010
Summary
Maxillary complete denture fractures are common. Three-dimensional finite element analysis (FEA) revealed high tensile strain at the incisal notch, indicating this area is prone to fracture.
Area of Science:
- Biomaterials science
- Dental prosthetics
- Mechanical engineering
Background:
- Maxillary complete denture fracture is a frequent issue in prosthodontics.
- Understanding strain distribution is crucial for improving denture design and longevity.
Purpose of the Study:
- To analyze strain patterns in maxillary complete dentures under occlusal load.
- To utilize three-dimensional finite element analysis (FEA) for detailed strain evaluation.
Main Methods:
- A maxillary complete denture was digitized into a 3D model.
- Finite element analysis (FEA) was performed with a 230 N occlusal force on posterior teeth.
- Mucosa and supporting bone models were created for realistic simulation.
Main Results:
- Highest tensile strains were observed at the incisal notch.
- Compressive strains dominated the intaglio surface and labial flange.
- The posterior border showed flexure away from the mucosa during loading.
Conclusions:
- The incisal notch is a critical area for denture fracture due to high tensile strain.
- The labial frenal notch is less likely to cause failure due to compressive strain.
- 3D FEA effectively visualizes strain distribution, aiding in predicting denture failure points.
