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Detection of acid diffusion through bovine dentine after adhesive application
Author(s) -
Hiraishi N.,
Kitasako Y.,
Nikaido T.,
Foxton R. M.,
Tagami J.,
Nomura S.
Publication year - 2004
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2004.00807.x
Subject(s) - adhesive , bond strength , phosphoric acid , dentin , smear layer , single bond , materials science , nuclear chemistry , curing (chemistry) , dentistry , chemistry , composite material , organic chemistry , group (periodic table) , medicine , layer (electronics) , metallurgy
Aim Acidic diffusion through bovine dentine was investigated by measuring pH changes on dentine surfaces after applying three adhesive systems. Methodology Coronal incisor bovine dentine discs, 0.5 mm thick, were prepared from dentine close to the pulp chamber. A single‐bottle adhesive system‐Single Bond, a self‐etching primer system‐Clearfil SE Bond and an ‘all‐in‐one’ adhesive system‐AQ Bond were used. The labial dentine surfaces were conditioned as follows: Single Bond groups: (SB‐1) 35% phosphoric acid etchant was applied and left in place; (SB‐2) the etchant was applied for 15 s and rinsed off for 10 s; (SB‐3) application of adhesive agent and light curing following step SB‐2; Clearfil SE Bond groups: (SE‐1) SE primer was applied for 20 s and dried; (SE‐2) application of adhesive agent and light curing following step SE‐1; AQ Bond groups: (AQ‐1) AQ Bond adhesive was applied for 20 s and dried, applied for additional 5 s and dried again; (AQ‐2) light curing following step AQ‐1. The pH change on the pulpal dentine surface was measured using a pH‐imaging microscope. Results All the Single Bond groups revealed a lower pH on the pulpal surface (pH 6.25, 6.59 and 6.64 for SB‐1, SB‐2 and SB‐3, respectively) compared with intact dentine. Clearfil SE Bond and AQ Bond groups showed no significant deference in pH value from intact dentine. Conclusions Acid diffusion from phosphoric acid etching was observed when placed on 0.5 mm‐thick dentine discs; however, there was only limited evidence of acid diffusion from SE primer and AQ Bond.