title: Degradation-stage effect of self-etching primer on dentin bond durability.
abstract: It is well-known that self-etching primers can be altered. However, the effects from altered primers on the dentin bond durability have yet to be thoroughly identified. In this study, we examined the effects from 5 altered Liquid A primers in different stages of degradation-where 2-hydroxyethylmethacrylate (HEMA) and 10-methacryloyloxydecyl dihydrogen phosphate (MDP), used in Liquid A primers, were altered by the hydrolysis of the methacryloxy ester portion in the HEMA and MDP-on the hybrid layer's quality and dentin bond durability. The hypothesis was that degradation stages of altered Liquid A primers have no effect on the hybrid layer's quality and on dentin bond durability. Bond strengths, obtained after thermo-cycling, were strongly dependent on the degradation stage of the altered Liquid A primer. Alterations of self-etching primers reduced dentin bond durability and decreased the created hybrid layer's quality.
authors.affiliation: Department of Crown Bridge Prosthodontics, Nihon University School of Dentistry at Matsudo, 870-1 Sakaecho, Nishi 2, Matsudo, Chiba 271-8587, Japan. aida.masahiro@nihon-u.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Aida
authors.forename: M
authors.initials: M
authors.lastname: Odaki
authors.forename: K
authors.initials: K
authors.lastname: Fujita
authors.forename: T
authors.initials: T
authors.lastname: Kitagawa
authors.forename: I
authors.initials: I
authors.lastname: Teshima
authors.forename: K
authors.initials: K
authors.lastname: Suzuki
authors.forename: N
authors.initials: N
authors.lastname: Nishiyama
mesh_terms: D002247:Carbon Isotopes; D055598:Chemical Phenomena; D001840:Dental Bonding; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D002247:Carbon Isotopes; D017220:Dentin-Bonding Agents; C500742:ED Primer II; D008689:Methacrylates; D019279:Resin Cements; D014867:Water; C005044:hydroxyethyl methacrylate; C069749:methacryloyloxydecyl dihydrogen phosphate