Abstract
In adhesive restoration, water intervention during or after the formation of the adhesive layer is an important factor having a decisive influence on adhesion. To improve the durability of the adhesive layer, two kinds of fluorine compounds: (sodium1-[(4-heptadecafluorooctyl)phenyl]-1-butyl-phenyl phosphate : FH3, and 2,2,2-trifluoroethyl methacrylate : 3FMA), were added to experimental selfetching primers on the HEMA-ethanol base containing 4-META(ME) or MDP, and measured bond strength was measured after one-year water storage or a thermal cycling test to evaluate the efficiency of the fluorine compounds. For adhesion to enamel, the addition of fluorine compounds to either adhesive monomer showed no effect. In contrast, for adhesion to dentine, the ME-containing primer added to 3FMA (0.5〜5% by weight) retained stable adhesive bonding over time, while the addition of FH3 had no effect. No distinct resin hybrid-layer was observed in any specimen on SEM observation. The results suggested that 3FMA would be a promising monomer to improve the durability of dentin adhesion of self-etching primers containing ME.
