During the most recent conference of the IADR/AADR/CADR, a variety of new oral health research studies were presented. One of them was the topic of today’s interview: Novel Dental Resin Composites with Improved Service Life. In the constant search for enhanced and improved dental materials, much research is taking place. In recent years, the popularity of composite resins has gained momentum due to their aesthetic appeal and clinical practicality. However, with an average service life of less than eight years, oral health researchers are continuously studying ways to improve these materials.
Dr. Jirun Sun is Senior Project Leader at the Volpe Research Center of the ADA Foundation.
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Chiraz Guessaier, CDA Oasis Manager
The objectives are to:
- Develop strong and durable dental resin composites by employing new monomers that are hydrolytically stable, and
- Demonstrate that resin composites based on these monomers perform superiorly to the traditional bisphenol A glycidyl dimethacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA) composites under testing conditions relevant to clinical applications.
New dental resin composites comprising urethane dimethacrylate (UDMA) and hydrolytically-stable TEG-DVBE were prepared and their performance were evaluated and compared with traditional composites based on Bis-GMA/TEGDMA as a control.
The study indicated that the new materials outperformed the control, traditional composites based on Bis-GMA/TEGDMA with respect to mechanical strength, toughness and rigidity following water immersion (fully preserved elastic modulus, E (new materials), vs. significant reduction in E (traditional controls)). At the equivalent levels of vinyl conversion, UDMA/TEGDVBE composites generated significantly less stress than control resin composites. Additionally, the composites have a dentin-matching refractive index. Results of this study not only suggest that the UDMA/TEG-DVBA resin composites are promising replacement for Bis-GMA/TEGDMA based dental materials, but also indicate their potential utility in designing a new generation of strong, tough and more durable dental restoratives.
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