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Related Experiment Videos

Photocure bonding agent containing phosphoric methacrylate.

T Wang1, T Nikaido, N Nakabayashi

  • 1Institute for Medical and Dental Engineering, Tokyo Medical and Dental University.

Dental Materials : Official Publication of the Academy of Dental Materials
|January 1, 1991
PubMed
Summary

New dental bonding agents using phosphoric methacrylate, specifically Phenyl-P, show improved bond strength to enamel and dentin. Surface demineralization is recommended for enhanced adhesion of dental composites.

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Dental composites require effective bonding agents for durable restorations.
  • Phosphoric methacrylate monomers offer potential for enhanced adhesion to tooth structures.
  • Visible-light-initiated polymerization is a common method for dental adhesives.

Purpose of the Study:

  • To develop and evaluate effective photocure phosphoric methacrylate bonding agents for dental composites.
  • To investigate the influence of specific monomers (MDP, Phenyl-P) and initiators on bond strength.
  • To determine optimal surface treatment for improved bonding to dentin and enamel.

Main Methods:

  • Dissolving methacryloyloxydecyl phosphoric acid (MDP) or 2-methacryloyloxyethyl phenyl phosphoric acid (Phenyl-P) in triethyleneglycol dimethacrylate (TEGDMA).

Related Experiment Videos

  • Incorporating camphorquinone (CQ) and N-phenylglycine (NPG) as a visible-light initiator system.
  • Testing bond strength to dentin and enamel substrates.
  • Evaluating the effect of demineralization using EDTA salt mixtures on bond strength.

    • Main Results:

    • Adhesives containing Phenyl-P in TEGDMA demonstrated the highest bond strength.
    • Maximum bond strength achieved was 5 MPa to dentin and 10 MPa to enamel.
    • Demineralization of dentin and enamel with a specific EDTA salt mixture improved bond strength.

    Conclusions:

    • Phenyl-P containing bonding agents are effective for achieving high bond strength to tooth substrates.
    • Visible-light-initiated polymerization with CQ/NPG is suitable for these dental adhesives.
    • Surface demineralization is a critical step for optimizing the bond strength of dental composites to dentin and enamel.