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Comparison of the erosive potential of gastric juice and a carbonated drink in vitro
Author(s) -
Bartlett D. W.,
Coward P. Y.
Publication year - 2001
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.1365-2842.2001.00780.x
Subject(s) - titratable acid , chemistry , enamel paint , food science , gastric acid , dentistry , stomach , medicine , biochemistry
The aim of this study was to compare the erosive effect of gastric juice and a carbonated drink on enamel and dentine by measuring release of calcium from 30 hemisectioned teeth in vitro . In addition, the titrable acidity (mL of 0·05 M sodium hydroxide required to neutralize) and pH of the fluids was estimated. The mean pH of the seven gastric acid samples was 2·92 (range 1·2–6·78) and mean titratable acidity 0·68 mL (range 0·03–1·64). Both the pH and the titratable acidity of the gastric juice varied between patients all of whom suffered from symptoms of reflux disease. The carbonated drink had a pH of 2·45 and a titratable acidity of 0·29 mL. The median amount of calcium released by the gastric acids from enamel was 69·6 μg L –1 (interquartile range 5·4–144) and 62·4 μg L –1 (2·2–125·3) from dentine. The carbonated drink released 18·7 μg L –1 (13·4–23·4) and 18·6 μg L –1 (11·9–35·3), respectively. The differences in calcium release by gastric juice and the carbonated drink were statistically significant for both enamel ( P < 0·005) and dentine ( P < 0·01). It is concluded that gastric juice has a greater potential, per unit time, for erosion than a carbonated drink.