Adhesion to dentin with resin using sulfinic acid initiator system.
A study was made on the dentin bonding of MMA/PMMA resin using sulfinic acid/BPO/amine polymerization initiator, to examine: 1) the effect of ferric and copper chloride contained in phosphoric acid or citric acid dentin conditioners, and 2) the effect of the addition of acidic monomers to the resin. Tensile bond strength was significantly improved by conditioning dentin with 10% phosphoric acid containing 3% ferric chloride. The citric acid-based conditioners and the addition of the copper salt to the acidic conditioners were less effective in improving bond strength. The mechanism of the improved bond strength is discussed in terms of polymerization promoting action of ferric ion at the dentin-resin interface. For improving bond strength, the presence of a suitable acidic monomer was essential. Its effectiveness depended on the types of acids: Two phosphoric acid ester monomers were effective but methacrylic acid had little effect.
Nyunt
M M
MM
Institute for Medical and Dental Engineering, Tokyo Medical and Dental University, Japan.
Imai
Y
Y
D000268:Adhesiveness; D000588:Amines / Q000737:chemistry; D000704:Analysis of Variance; D000818:Animals; D001585:Benzoyl Peroxide / Q000737:chemistry; D002417:Cattle; D003300:Copper / Q000737:chemistry; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D007477:Ions; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry*; D010756:Phosphoric Acids; D011108:Polymers / Q000737:chemistry; D013441:Sulfinic Acids / Q000737:chemistry*; D013718:Tensile Strength
D000588:Amines; D017220:Dentin-Bonding Agents; D005290:Ferric Compounds; D007477:Ions; D008768:Methylmethacrylates; D010756:Phosphoric Acids; D011108:Polymers; D013441:Sulfinic Acids; D003300:Copper; C030242:phosphoric acid; D001585:Benzoyl Peroxide