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Dental Restorative Materials Based on Thiol-Michael Photopolymerization
S Huang1, M Podgórski1,2, X Zhang1
11 Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, CO, USA.
Journal of Dental Research
|February 15, 2018
Summary
New thiol-Michael resins offer improved dental restorations with rapid curing and reduced shrinkage stress. These advanced materials show enhanced toughness and stable performance in moist conditions, outperforming traditional methacrylate-based polymers.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
- Dental Materials
Background:
- Methacrylate-based resins dominate dental restorations but have limitations.
- Step-growth thiol-Michael polymerization offers an alternative with potential benefits.
Purpose of the Study:
- To develop and evaluate thiol-Michael photopolymerizable resins as dental restorative materials.
- To compare their properties against traditional methacrylate-based systems.
Main Methods:
- Fabrication of thiol-Michael resins with varying ester content.
- Analysis of polymerization kinetics, shrinkage stress, and thermomechanical properties.
- Mechanical testing of composites before and after water conditioning.
Main Results:
- Thiol-Michael resins achieved >90% conversion with significantly reduced shrinkage stress.
- Ester-free formulations exhibited superior water uptake properties.
- Materials showed higher toughness and stable mechanical performance after water exposure.
Conclusions:
- Photopolymerized thiol-Michael resins demonstrate promise as dental restorative materials.
- They offer advantages in reduced stress, improved toughness, and water stability.
- Further optimization could lead to advanced dental composites.
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