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Compositional design and optimization of dentin adhesive with neutralization capability.

Linyong Song1, Qiang Ye1, Xueping Ge1

  • 1University of Kansas, Bioengineering Research Center, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.

Journal of Dentistry
|July 7, 2015
PubMed
Summary
This summary is machine-generated.

This study shows that adding 2-N-morpholinoethyl methacrylate (MEMA) to dentin adhesives improves their ability to neutralize acid. The optimal MEMA concentration enhances neutralization without negatively impacting material properties.

Keywords:
Crosslinking densityDentin adhesiveNeutralization capacityPhotopolymerizationTertiary amine

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry

Background:

  • Dentin adhesives are crucial for dental restorations.
  • Acidic challenges in the oral environment can compromise restoration integrity.
  • Tertiary amine co-monomers offer potential for enhanced adhesive functionality.

Purpose of the Study:

  • To investigate the impact of 2-N-morpholinoethyl methacrylate (MEMA) on dentin adhesive properties.
  • To evaluate the polymerization behavior, neutralization capability, and mechanical characteristics of MEMA-containing adhesives.
  • To determine the optimal MEMA concentration for enhanced performance.

Main Methods:

  • Formulations containing varying concentrations of MEMA were prepared using a HEMA/BisGMA base.
  • Characterization included water miscibility, sorption/solubility, photopolymerization kinetics, DMA, and MDSC.
  • Neutralization capacity was assessed by monitoring pH changes in lactic acid solution.

Main Results:

  • Increasing MEMA concentration led to higher water sorption and lower glass transition temperature and crosslinking density.
  • MEMA-containing adhesives demonstrated significant pH increase in lactic acid solution over 90 days.
  • Optimal MEMA concentration for neutralization was found to be between 20 and 40 wt%.

Conclusions:

  • MEMA-functionalized dentin adhesives exhibit valuable acid neutralization capabilities.
  • Crosslinking density significantly influences the rate of neutralization in these copolymers.
  • MEMA offers a promising approach to developing self-buffering dental adhesives.