Abstract
The purpose of this research is to evaluate the acid solubility of fluoride treated dentin and the bond strength of an adhesive resin (Panavia EX®) to their dentin in order to improve the adhesive properties of the adhesive resin to human dentin.Human dentin were treated with 40% phosphoric acid for 1 min. followed by 1% TiF4 aqueous solution for 3 min., and 0.2 M EDTA adjusted to pH 7.0 for 1 min. followed by 1% TiF4 and 30% HEMA solution, respectively.The results are as followed, 1. The shear bond strength of the adhesive resin to the dentin treated with the former increased more one half times to twice than the former acid treatment alone and the calcium elution into an acid buffer from the treated dentin was reduced to less than 30% of the acid treatment alone.The presence of an impregnated layer of Titanium in the treated dentin and electron probe microanalytic observations resulted in reduced the dye permeability and advanced the obturation of the dentinal tubles.2. The shear bond strength of the adhesive resin to the dentin treated with the latter increased more three times than the former acid treatment alone.
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