[Electron-probe microanalysis examination of acid-proof dentin layer].
To predict the presence and thickness of the acid-proof dentin layer by the method of combining the halogenated methacrylate and electron-probe microanalyzer (EPMA), 2-methacryloyloxyethyl hydrogen chloromaleate (CIMEM) used as a base monomer for a bonding agent and 2-bromoethyl methacrylate (2 BEM), 2-(4-bromophenyl)ethyl methacrylate (BPy1EM), 2-(4-bromo-1-naphthyl)ethyl methacrylate (BNEM) and 2,4,6-tribromophenoxy methacrylate (TriBr-PM) used as tracers were synthesized. The bond strength to dentin treated with 37% phosphoric acid solution for 30 sec. was not statistically different for the bonding agents with and without tracers. The SEM micrographs revealed that the layers, which may be acid-proof dentin layers, were 3-4 microns thick at the resin-dentin interface for all bonding agents. According to EPMA analysis, cps of C1Ka and BrLa increase at the same points and the acid-proof dentin layer thickness was about 4 microns.
Fukushima
T
T
Department of Dental Materials and Devices, Fukuoka Dental College.
Inoue
Y
Y
Kawaguchi
M
M
Horibe
T
T
D000134:Acid Etching, Dental; D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects*; D004577:Electron Probe Microanalysis; D008298:Maleates / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry
D008298:Maleates; D008689:Methacrylates