title: Improved efficacy of some phosphate-based dentin-bonding agents.
abstract: The gap-reducing efficacy of four phosphate-based dentin-bonding agents was tested after various treatments of the dentin and/or the bonding agents. The investigation was carried out on extracted human teeth. One of the root surfaces was ground flat, and a cylindrical butt-joint cavity was prepared in the ground dentin surface. It was found that the efficacy of two of the adhesives, presumably being chloro-substituted phosphates, could be markedly improved if the primed dentin was rinsed with copious amounts of water, dried by compressed air, and a second layer of bonding agent applied. The mechanism behind this improvement is assumed to be the formation of hydrogen chloride, which dissolves part of the smear layer.
authors.forename: E K
authors.initials: EK
authors.lastname: Hansen
authors.forename: E C
authors.initials: EC
authors.lastname: Munksgaard
authors.forename: E
authors.initials: E
authors.lastname: Asmussen
mesh_terms: D001840:Dental Bonding / Q000379:methods*; D003737:Dental Cavity Preparation; D003738:Dental Cements; D006801:Humans; D010710:Phosphates; D019279:Resin Cements
chemical_list: D003738:Dental Cements; D010710:Phosphates; D019279:Resin Cements; C041330:Scotchbond