Adhesion Mechanism of MMA/TBBO Resin Containing 4-META to Decalcified Dentin

DOI
  • AKIMOTO Takahiro
    Division of Functional Polymers, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • KADOMA Yoshinori
    Division of Functional Polymers, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University
  • IMAI Yohji
    Division of Functional Polymers, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University

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Other Title
  • 4-METAを含むMMA/TBBO系接着性レジンの象牙質への接着機構について : 脱灰象牙質を用いたモデル実験

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Abstract

As a model experiment to understand the mechanism of adhesion of the 4-META-MMA/TBBO resin to dentin, 4-META-MMA/TBBO was polymerized in the presence of decalcified dentin sheet treated with citric acid(CA) aqueous solution containing ferric chloride(FC).Curing time of MMA/TBBO resin was reduced by the addition of 4-META to MMA.Addition of 4-META increased molecular weight of PMMA.PMMA polymerized inside the decalcified dentin sheet was insoluble in acetone.PMMA obtained from the monomer liquid used in commercial Super-Bond C & B was all insoluble and no soluble fraction was obtained.These results suggested that 4-META accelerated polymerization of MMA-TBBO resin in the presence of ferric ion and was effective to enhance molecular weight of PMMA.These effects seemed to be related to high bond strength of Super-Bond with dentin.

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