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pH of tooth surface in healthy adolescents at rest and after a glucose rinse: effect of 72 hours of plaque accumulation

Type:  Articles

Pubblication date:  20/2012

Authors:  L. Levrini1*, L. Tettamanti1*, G.M. Abbate1*, M.P. Caria2-3, A. Caprioglio3

Language:  English

Institution:  1 Faculty of Medicine, School of Dentistry, University of Insubria, Varese, Italy 2 Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden 3 Department of Clinical and Experimental Medicine, Avogadro University, Novara, Italy *Equally contributing authors

Publication:  European Journal of Paediatic Dentistry

Publisher:  Ariesdue Srl

Keywords:  Glucose rinse; pH; Plaque accumulation.

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Title:  pH of tooth surface in healthy adolescents at rest and after a glucose rinse: effect of 72 hours of plaque accumulation

Abstract:  Aim This study was performed to evaluate the effect of a glucose rinse and of plaque accumulation on pH of tooth surface in healthy adolescents with a device used in gastroenterology and never tested in the oral cavity. Methods Values of pH were monitored in 12 adolescents using a portable device (pH-day 2® Menfis, bioMedica S.r.l., Bologna, Italy) with a disposable antimonium electrode kept in contact with the interproximal surface of the upper molars for 40 minutes respectively before and after a one-minute rinse with 10 ml of a 10% glucose solution. The same procedure was repeated in the same subjects after 72 hours of plaque accumulation. Results The device tested resulted difficult to use on the tooth surface because of the size of the active part of the probe. The glucose rinse caused a statistically significant decrease of the mean pH, restrained in basal conditions (d = -0.16, p <0.05), clinically relevant after plaque accumulation (d = -1.24, p <0.05). Time in minutes of pH < 6 grew considerably only in case of combination of plaque accumulation and glucose rinse (d = 20.90, p <0.05). A Stephan’s curve of drop and recover of the pH values was not recorded. Conclusions The continuous recording of pH of natural plaque present on the tooth could represent an alternative to other techniques found in literature. More studies are necessary to verify the suitability of this new device for the monitoring of pH in the oral cavity.

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