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The Relationship Between Plaque pH, Plaque Acid Anion Profiles, and Oral Carbohydrate Retention After Ingestion of Several 'Reference Foods' by Human Subjects

Department of Dental Sciences, School of Dental Surgery, University of Liverpool, PO Box 147, Liverpool, England L69 3BX

W.M. Edgar

Department of Dental Sciences, School of Dental Surgery, University of Liverpool, PO Box 147, Liverpool, England L69 3BX

The primary aim of this study was to rank several reference foods (apple drink, caramel, chocolate, cookie, skimmed milk powder, snack cracker, and wheat flake) according to their plaque pH response as monitored in a panel of 12 volunteers by the plaque-sampling method for comparison with data previously reported with other methods used to assess cariogenicity potential. Secondary experiments (using subsets of the panel of subjects) were undertaken in an attempt to elucidate some of the reasons for the observed plaque pH changes. Oral carbohydrate retention was measured at a single time period after food use as total anthrone-positive carbohydrate material, and as specific acidogenic sugars by gas-liquid chromatography after gel-exclusion chromatography. The concentrations of acid anions in the plaque fluid after food consumption were measured by isotachophoresis eight min after food use. According to the plaque pH response, apple-flavored fruit drink and chocolate were the most acidogenic foods and skimmed milk powder the least acidogenic. There were significant correlations (p < 0.05) between the plaque pH data and lactate-plus-acetate concentrations in plaque fluid, but the correlations between the pH data and any of the carbohydrate retention parameters were not significant.

Journal of Dental Research, Vol. 67, No. 5, 861-865 (1988)
DOI: 10.1177/00220345880670051301


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