Influence of primers containing cupric ion on bonding of dentin treated with phosphoric acid.
A primer containing cupric [Cu (II)] ions that promoted the interfacial initiation of polymerization from dentin surfaces was studied. Bovine dentin surfaces were treated with 10% phosphoric acid, then with a Cu primer consisting of aqueous 35% 2-hydroxyethyl methacrylate (HEMA) containing 0.03% cupric salt, and finally bonded with 4-META/MMA-PMMA resin initiated with oxidized tributylborane (TBBO). The use of the Cu primer resulted in a mean bond strength of 12.5 MPa compared with 3.8 MPa without the primer and 6.3 MPa using a 35% HEMA primer without Cu. The Cu primer produced a bond strength of 13.5 MPa even without 4-META in the resin system. Use of the Cu primer should simplify the bonding procedure since enamel and dentin can be etched simultaneously with 10% phosphoric acid.
Institute for Medical and Dental Engineering, Tokyo Medical and Dental University, Japan.
Y
Y
Imai
R
R
Ikemura
D000134:Acid Etching, Dental; D000180:Acrylic Resins; D000704:Analysis of Variance; D000818:Animals; D001896:Boron Compounds / Q000737:chemistry; D002417:Cattle; D002712:Chlorides; D002951:Citrates; D019343:Citric Acid; D003188:Composite Resins / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005290:Ferric Compounds; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids
D000180:Acrylic Resins; D001896:Boron Compounds; D002712:Chlorides; D002951:Citrates; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005290:Ferric Compounds; D008689:Methacrylates; D010756:Phosphoric Acids; C009523:tri-n-butylborane; D019343:Citric Acid; C005044:hydroxyethyl methacrylate; D003300:Copper; C031172:4-META resin; C030242:phosphoric acid; C024555:ferric chloride