title: Critical surface energy of composite cement containing MDP (10-methacryloyloxydecyl dihydrogen phosphate) and chemical bonding to hydroxyapatite.
abstract: Self-adhesive composite cements are increasingly used for cementing inlays/onlays, intraradicular posts, crowns and laminate veneers. Wider clinical acceptance is driven by simpler and faster handling procedures, much like observed for self-etching adhesives. 10-Methacryloyloxydecyl  dihydrogen phosphate (MDP) is a bi-functional monomer incorporated as the reactive ingredient in a contemporary self-adhesive cement. We have examined the surface free energy parameters of this cement and studied the mode of action of the cement on dentine substrate by contact angle measurements  to determine the critical surface energy of the cement. Retention of the infrared absorption bands characteristic of the acrylate moieties on the surface of hydroxyapatite particles suggests that MDP contributes to the overall bonding to dentine by forming ionic chemical bonds with surface  calcium ions in dentine crystalites.
authors.affiliation: Faculty of Odontology, University of Toulouse III, 3 Chemin des Maraîchers, 31062 Toulouse Cedex 9, France.
authors.forename: Firas
authors.initials: F
authors.lastname: Dabsie
authors.forename: Geneviève
authors.initials: G
authors.lastname: Grégoire
authors.forename: Patrick
authors.initials: P
authors.lastname: Sharrock
mesh_terms: D003738:Dental Cements / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry; D017886:Durapatite / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D058105:Polymerization; D017155:Wettability
chemical_list: D003738:Dental Cements; D008689:Methacrylates; C069749:methacryloyloxydecyl dihydrogen phosphate; D017886:Durapatite