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High performance dental resin composites with hydrolytically stable monomers
Xiaohong Wang1, George Huyang1, Sri Vikram Palagummi2
1Dr. Anthony Volpe Research Center, American Dental Association Foundation, Gaithersburg, MD 20899, USA.
Summary
New dental resin composites using hydrolytically stable monomers demonstrate superior strength and durability. These advanced materials offer enhanced performance over traditional composites for improved dental restorations.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Polymer Chemistry
Background:
- Traditional dental resin composites often degrade due to hydrolysis.
- Bisphenol A glycidyl dimethacrylate (Bis-GMA) and triethylene glycol dimethacrylate (TEGDMA) are common but have limitations.
Purpose of the Study:
- To develop strong, durable dental resin composites using novel, hydrolytically stable monomers.
- To compare the performance of these new composites against traditional Bis-GMA/TEGDMA composites in clinically relevant tests.
Main Methods:
- Synthesized new resins using triethylene glycol divinylbenzyl ether (TEG-DVBE) and urethane dimethacrylate (UDMA).
- Prepared composites with micro and nano-sized fillers.
- Evaluated properties including degree of conversion, mechanical strength, hardness, water sorption, shrinkage, and polymerization stress.
Main Results:
- UDMA/TEG-DVBE composites showed comparable water sorption, solubility, and shrinkage to controls.
- Experimental composites exhibited significantly increased flexural strength (up to 26.8%) and fracture toughness (up to 27.7%).
- Reduced polymerization stress (up to 52.7%) and full modulus recovery after water sorption were observed, though hardness was slightly lower than controls but clinically acceptable.
Conclusions:
- Hydrolytically stable UDMA/TEG-DVBE resin composites offer enhanced mechanical properties and durability.
- These new composites are promising candidates for a new generation of dental restorative materials.
- Composition-controlled polymerization and stable monomers contribute to improved clinical performance.
