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A study of acrylic resin denture base material distortion using computer-aided holographic interferometry
R J van Straten1, M L Hitge, W Kalk
1University of Nijmegen, The Netherlands.
The International Journal of Prosthodontics
|November 1, 1991
Summary
This study introduces a holographic interferometer to analyze dental prosthesis deformation. It reveals how acrylic resin dentures relax residual stress and deform with temperature changes over time.
Area of Science:
- Biomaterials Science
- Optical Engineering
- Dental Materials
Background:
- Acrylic resin dentures are prone to residual stress and deformation.
- Understanding these changes is crucial for long-term dental prosthesis performance.
- Current methods for analyzing these deformations may lack precision.
Purpose of the Study:
- To describe a holographic interferometer for dental prosthesis deformation analysis.
- To qualitatively study residual stress relaxation in acrylic resin dentures.
- To quantitatively measure dimensional changes due to temperature variations.
Main Methods:
- Utilized a holographic interferometer to capture fringe patterns of dentures.
- Qualitatively analyzed stress relaxation during the initial 48 hours post-fabrication.
- Employed computer-aided analysis for quantitative measurement of deformations.
- Tested the system with disk-shaped acrylic resin materials.
Main Results:
- Fringe patterns exhibited symmetry correlated with denture shape.
- Achieved measurement accuracy better than 0.2 microns for thermal deformations.
- Demonstrated the potential to study resin aging effects on temperature response over time.
Conclusions:
- Holographic interferometry provides a precise method for studying dental prosthesis deformations.
- The system can monitor stress relaxation and thermal response of acrylic resins.
- Quantitative deformation data, including original shape comparison, aids in material analysis.