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High-Performance Dental Adhesives Containing an Ether-Based Monomer.

S Yamauchi1,2,3, X Wang1, H Egusa2

  • 1Volpe Research Center, American Dental Association Foundation, Gaithersburg, MD, USA.

Journal of Dental Research
|December 22, 2019
PubMed
Summary

New dental adhesives free from Bis-GMA and HEMA show improved durability and bonding strength. These ether-based formulations offer enhanced performance and potential for longer-lasting dental restorations.

Keywords:
bonding agentdental restorationdentin infiltrationether-based resinmedical devicetensile bond strength

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Materials Science

Background:

  • Dental adhesives are crucial for successful restorations, but traditional methacrylate-based resins like Bis-GMA and HEMA have limitations.
  • Developing novel adhesive systems with improved hydrolytic stability and durability is essential for long-term clinical success.

Purpose of the Study:

  • To formulate and evaluate novel dental adhesives using triethylene glycol divinylbenzyl ether (TEG-DVBE) as a substitute for Bis-GMA and HEMA.
  • To assess the bonding strength, durability, and mechanical properties of these new adhesives compared to conventional ones.

Main Methods:

  • Two new dental adhesives were formulated using TEG-DVBE with either UDMA or pyromellitic glycerol dimethacrylate.
  • Evaluated shear bond strength, microtensile bond strength (µTBS), and bond stability after thermocycling.
  • Assessed resin infiltration, mechanical properties (flexural strength/modulus), hydrophobicity, and water sorption/solubility.

Main Results:

  • TEG-DVBE-containing adhesives demonstrated equivalent shear bond strength and µTBS to controls.
  • These novel adhesives significantly outperformed controls after 10,000 thermocycles.
  • Adhesives showed increased hydrophobicity, deeper resin tag formation, thicker hybrid layers, and an 89% reduction in water solubility.

Conclusions:

  • Novel TEG-DVBE-based dental adhesives offer comparable or improved bonding performance and significantly enhanced durability over conventional Bis-GMA/HEMA systems.
  • These findings suggest potential for developing dental restorations with extended service life and broader applications in medical devices.