New Visible-light Initiator Systems for Adhesion of Resin to Dentin

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  • IKAKURA Kenji
    Division of Functional Polymer, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • KOJIMA Katsunori
    Division of Functional Polymer, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • KADOMA Yoshinori
    Division of Functional Polymer, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • IMAI Yohji
    Division of Functional Polymer, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

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Other Title
  • 象牙質接着用の新しい可視光線重合開始剤

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Description

To develop a new visible-light initiator system for adhesion of resin to dentin, we examined the curing time of MMA/PMMA resin and adhesive strength between the resin and dentin using the following new initiator systems:tertiary-butylperoxymaleic acid(MA), which contains the carboxylic acid group having an affinity with dentin, was combined with camphorquinone(CQ)or 7, 7-dimethyl-2, 3-dioxobicyclo[2.2.1]heptane-1-carboxylic acid(DDHCA)as a photosensitizer and dimethylaminoethyl methacrylate(DMAEMA), 1, 3, 5-trimethyl-2-thiobarbituric acid(TMTB)or N-phenylglycine(NPG)as a reducing agent.Addition of MA to the photoinitiator systems usually shortened the curing time and improved the adhesive strength significantly.The adhesive strength of 10MPa was obtained without adhesion promoting monomers and the adhesive resin layer fractured cohesively.

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