Use of 2-isocyanatoethyl methacrylate and iron (II) perchlorate for bonding tri-n-butylborane-initiated luting agents to dentin.
The present study investigated the effect of 2-isocyanatoethyl methacrylate (IEM) and iron (II) perchlorate on dentin adhesion. Four primers were evaluated, consisting of aqueous 2-hydroxyethyl methacrylate (HEMA) solutions containing 5, 10, 20 or 50 micromol/g iron (II) perchlorate. Five luting agents were prepared with methyl methacrylate (MMA), poly(methyl methacrylate) (PMMA), tri-n-butylborane (TBB) initiator and IEM. The concentrations of IEM in the luting agents were 0.2, 0.4, 0.8, 2.0 and 4.0 wt%. Extracted bovine teeth were ground to expose the dentin, etched with an aqueous solution of 10 wt% phosphoric acid, primed, and then bonded with stainless-steel rods; tensile bond strengths were determined after 1 d immersion in water. The highest bond strength (20.7 MPa) was recorded for the group using 10 micromol/g iron (II) perchlorate and 2.0 wt% IEM. The use of IEM was effective in decreasing the optimal concentration of iron (II) perchlorate, and this may contribute to the color stability of iron-containing pretreatment agents.
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Sakamoto, Japan. yohsuke@net.nagasaki-u.ac.jp
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Y
Taira
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Matsumura
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Atsuta
D000134:Acid Etching, Dental; D000704:Analysis of Variance; D000818:Animals; D001896:Boron Compounds / Q000737:chemistry*; D002417:Cattle; D003116:Color; D001840:Dental Bonding; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005069:Evaluation Studies as Topic; D005290:Ferric Compounds / Q000737:chemistry*; D007101:Immersion; D017953:Isocyanates / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D020366:Methylmethacrylate; D008768:Methylmethacrylates / Q000737:chemistry; D010472:Perchlorates / Q000737:chemistry*; D010756:Phosphoric Acids / Q000008:administration & dosage; D019904:Polymethyl Methacrylate / Q000737:chemistry; D013193:Stainless Steel / Q000737:chemistry; D013718:Tensile Strength; D014867:Water
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D005290:Ferric Compounds; D017953:Isocyanates; D008689:Methacrylates; D008768:Methylmethacrylates; D010472:Perchlorates; D010756:Phosphoric Acids; D014867:Water; C009523:tri-n-butylborane; D013193:Stainless Steel; C001473:iron perchlorate; D020366:Methylmethacrylate; C005044:hydroxyethyl methacrylate; C029845:2-isocyanatoethyl methacrylate; D019904:Polymethyl Methacrylate