Efficacy of varying the NMEP concentrations in the NMGly-NMEP self-etching primer on the resin-tooth bonding.
It is well understood that the application of a self-etching primer enhances the bonding at the resin-teeth interface. In this study, we designed a self-etching primer consisting of N-methacryloyl glycine (NMGly) and N-methacryloyl-2-aminoethyl phosphonic acid (NMEP). The demineralization effects on the hydroxyapatite or dentin by the carboxylic acid in the NMGly and by the phosphonic acid in the NMEP and their effects on the bond strength of the resin to the tooth were examined. The application of the NMGly-NMEP solution to the enamel resulted in an increase in the bond strength when additional amounts of NMEP were added to the NMGly aqueous solution. This increase was due to the phosphonic acid in the NMEP demineralizing the enamel. Conversely, the addition of the NMEP to the NMGly solution resulted in a decrease in the bond strength to the dentin. The optimal concentration of the NMEP in the NMGly-NMEP solution resulted in bond strengths of over 20 MPa for both the enamel and dentin.
Nishiyama
Norihiro
N
Department of Dental Materials, Nihon University School of Dentistry at Matsudo, 870-1 Sakaecho, Nishi 2, Matsudo, Chiba 271-8587, Japan. norihiro@mascat.nihon-u.ac.jp
Fujita
Kou
K
Ikemi
Takuji
T
Maeda
Takahide
T
Suzuki
Kazuomi
K
Nemoto
Kimiya
K
D000268:Adhesiveness; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000032:analysis / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000032:analysis / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry*; D005998:Glycine / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry*; D066298:In Vitro Techniques; D008422:Materials Testing / Q000379:methods; D008689:Methacrylates / Q000032:analysis / Q000737:chemistry*; D063065:Organophosphonates / Q000032:analysis / Q000737:chemistry*; D013499:Surface Properties; D013718:Tensile Strength; D014070:Tooth / Q000737:chemistry* / Q000502:physiology*
D003188:Composite Resins; D003738:Dental Cements; D008689:Methacrylates; C500875:N-methacryloyl-2-aminoethyl phosphonic acid; D063065:Organophosphonates; C093041:N-methacryloyl glycine; D005998:Glycine