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Neutralizing phosphoric acid in the acid etch resin technique
Author(s) -
KELLAR M.,
DUKE E. S.
Publication year - 1988
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1988.tb00200.x
Subject(s) - phosphoric acid , wetting , enamel paint , molar , bond strength , materials science , penetration (warfare) , composite material , composite number , chemistry , adhesive , dentistry , metallurgy , medicine , layer (electronics) , operations research , engineering
Summary The use of an alkaline wetting agent, used to neutralize phosphoric acid in the acid etch technique, was investigated with respect to improving the bond strength and microleakage behaviour of composite resin. The alkaline wetting agent has been shown to prevent the accumulation of calcium biphosphates, as a result of secondary recrystallization of hydroxyapatite, within the depths of etched enamel. To examine the influence of the alkaline wetting agent on bond strength, composite cylinders were prepared on enamel surfaces of extracted third molar teeth and tested for shear bond strength. Microleakage behaviour was observed on class V oval preparations in the cervical thirds of extracted third molars using a dye penetration technique. No significant improvement in shear bond strength was demonstrated with the alkaline wetting agent over conventional acid etching. In addition, the microleakage observed following the use of the alkaline wetting was characteristic of that for conventional acid etching.