Effect of 10% Phosphoric acid Conditioning on the Efficacy of a Dentin Bonding System.

DOI NDLデジタルコレクション Web Site PubMed 被引用文献6件 参考文献23件
  • WU Jian
    Department of Operative Dentistry, Showa University, School of Dentistry
  • ITOH Kazuo
    Department of Operative Dentistry, Showa University, School of Dentistry
  • YAMASHITA Takashi
    Department of Operative Dentistry, Showa University, School of Dentistry

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The efficacy of a commercial total-etch wet-bonding dentin bonding system and the effect of conditioning using 10% phosphoric acid both on the Ca-content in the substrate dentin and on the efficacy of the experimental contraction gap-free dentin bonding system were evaluated by measuring the wall-to-wall polymerization contraction gap width of a commercial light-activated resin composite filled into a cylindrical cavity prepared in extracted human dentin. The Ca-content in the dentin was measured with an EDS. Complete marginal adaptation was obtained only in the experimental contraction gap-free dentin bonding system group. The Cacontent in the dentin was rapidly reduced by the 10% phosphoric acid conditioning. It was concluded that the dentist should not decalcify the dentin cavity wall possibly by using a dentin conditioner such as 10% phosphoric acid because the resin composite paste is apt to separate easily from the decalcified dentin cavity wall during polymerization.

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