title: 2-HEMA-free dentin bonding system to prevent contraction gap.
abstract: The effects of 2-hydroxyethyl methacrylate (2-HEMA) both in the primer and in the commercial dentin bonding agent on the efficacy of the dentin bonding system was evaluated by measuring the polymerization contraction gap width of a commercial resin composite restored in a cylindrical dentin cavity prepared in an extracted human molar. Contraction gap formation was prevented in the group of the EDTA-conditioning followed by glyceryl mono-methacrylate, ethylene glycol and 1,6-hexanediol priming regardless of the 2-HEMA content in the dentin bonding agent containing 10-methacryloxydecyl dihydrogen phosphate. However, gap formation could not be prevented completely by the 2-HEMA priming. Therefore, it was possible to conclude that 2-HEMA was neither essential in the primer nor in the dentin bonding agent because of its low bonding efficacy and the resulting side effects on skin tissue as a delayed allergic reaction.
authors.affiliation: Department of Operative Dentistry, Showa University, School of Dentistry, Tokyo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ohba
authors.forename: A
authors.initials: A
authors.lastname: Manabe
authors.forename: K
authors.initials: K
authors.lastname: Itoh
authors.forename: H
authors.initials: H
authors.lastname: Hisamitsu
authors.forename: S
authors.initials: S
authors.lastname: Wakumoto
mesh_terms: D001840:Dental Bonding / Q000379:methods; D018772:Dental Marginal Adaptation; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004492:Edetic Acid; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C074669:Clearfil Photo Bond; C005044:hydroxyethyl methacrylate; D004492:Edetic Acid