Summary
Several laboratory studies have been conducted to confirm and compare the anticaries potential of the major fluoride toothpastes currently marketed in China. This paper reports on one series of tests that was conducted under the guidance of the China National Committee for Oral Health (NCOH). In this series of tests, one of the marketed toothpastes, which is formulated with sodium fluoride (NaF) in a silica abrasive that is highly compatible with the fluoride active ingredient, provided significantly greater efficacy than all of the other toothpastes tested. This product is Crest toothpaste. On the basis of a separate series of studies conducted independently by the NCOH, Crest toothpaste received the official endorsement of the China NCOH as a proven anticaries toothpaste. The studies reported here provide additional, quantitative verification of the efficacy of this formulation. Included in this assessment of anticaries efficacy were measurements of fluoride uptake into demineralised human enamel, changes in the surface microhardness of the enamel as a function of each product tested, post resistance of remineralised enamel that was subjected to a secondary acid challenge, and quantitative microradiographic analyses of remineralised specimens. Each parameter demonstrates Crest toothpaste provides a higher level of anticaries efficacy than other fluoride toothpastes marketed in China. The results of these tests are consistent with previous tests conducted by the NCOH.
Comparatif d'efficacite contre les caries du dentifrice Crest et de quelques dentifrices commercialises en Chine - resultats d'un test de mise en cycle du pH in vitro
Resume
Plusieurs etudes ont ete menees en laboratoire afin de confirmer et de comparer le potentiel cariostatique des principaux dentifrices fluores, actuellement vendus en Chine. Cet article relate l'une des series de tests effectues sous le controle du Comite National Chinois pour la Sante Bucco-Dentaire (NCOH). Dans ce groupe de tests, l'un des dentifrices commercialises, a base de fluor de sodium (NaF) integre dans un abrasif au silice hautement compatible avec le fluor actif, s'est revele nettement plus efficace que tous les autres dentifrices testes. Il s'agit du dentifrice Crest. A partir d'une serie particuliere de tests assures independamment par le NCOH, le dentifrice Crest a ete officiellement reconnu par le NCOH comme etant un dentifrice capable de combattre les caries. Les etudes dont il est question dans cet article apportent des preuves quantitatives supplementaires sur l'efficacite de cette formule. Parallelement a cette evaluation de l'action cariostatique, on a mesure la dose de fluor absorbee par l'email humain demineralise, les changements dans la microdurete de surface de l'email pour chaque produit teste, la post resistance de l'email remineralise en le soumettant a une attaque acide secondaire. On a egalement procede a des analyses quantitatives par microradiographie des specimens remineralises. Chaque parametre prouve que le dentifrice Crest est beaucoup plus efficace pour lutter contre les caries que tous les autres dentifrices fluores, commercialises en Chine. Les resultats de ces essais corroborent les tests anterieurs effectues par le NCOH.
Vergleich der karieshemmenden Wirkung von Crest und einigen anderen, im chinesischen Handel erhaltlichen Zahnpasten – Ergebnisse einer in vitro Studie zum pH-Zyklus
Zusammenfassung
In verschiedenen Laborstudien sollte die kariesverhutende Wirkung von derzeit in China handelsublichen Fluorzahnpasten verglichen bzw. bestatigt werden. Der vorliegende Beitrag beschreibt eine vom Chinesischen Nationalkomitee fur Mundgesundheit durchgefuhrte Testserie. Eine der Testmarken – Crest – erwies sich aufgrund ihrer Natriumfluorid-Formel und groben Pastenkonsistenz, in der Fluorid als aktiver Bestandteil eine hohe Wirksamkeit entwickelt, eine signifikant hohere Effektivitat als alle ubrigen Testprodukte. Basierend auf einer weiteren, vom chinesischen Nationalkomitee durchgefuhrten Testreihe, erkannte es Crest offiziell als Zahnpasta mit erwiesener karieshemmender Wirkung an. Die hier beschriebenen Untersuchungen stellen eine quantitative Untermauerung betreffend die Wirksamkeit der oben genannten Formel dar. Teilaspekte des Tests zur karieshemmenden Wirkung waren: Messung der Fluoridaufnahme des Zahnschmelzes beim Menschen, Veranderungen in der Mikroharte der Schmelzoberflache in bezug auf alle Testpasten, andauernde Widerstandsfahigkeit des remineralisierten Schmelzes bei erneutem Einfuhren in Saure sowie mikroradiographische Quantitatsanalyse von remineralisierten Proben. Hinsichtlich aller genannten Kriterien erwies sich Crest als das Produkt, das einen hoheren Schutz vor Karies bot als die ubrigen fluoridierten, in China handelsublichen Zahnpasten. Die Testresultate decken sich mit denen der vom chinesischen Nationalkomitee fur Mundgesundheit zuvor bereits durchgefuhrten Untersuchungen.
Eficacia anticaries de la pasta dental Crest en comparacion con algunos dentifricos chinos en el mercado - resultados de una prueba in vitro de variacion ciclica del pH
Resumen
Se han conducido varios estudios de laboratorio para confirmar y comparar el potencial anticaries de los dentifricos fluorados que mas se venden actualmente en China. Este articulo informa sobre una serie de pruebas que fueron realizados bajo la direccion del Comite Nacional de Salud Buco-dental de China (CNSB). En esta serie de pruebas, una de las pastas dentales en el mercado cuya formula incluye fluoruro de sodio (NaF) en un abrasivo a base de silice que es altamente compatible con el ingrediente activo de fluoruro, proporciono una eficacia significativamente mayor que todas las otras pastas dentales sometidas a prueba. Este producto es la pasta dental Crest. Sobre la base de una serie separada de estudios conducidos en forma independiente por el CNSB, la pasta dental Crest recibio el respaldo oficial del CNSB de China como un dentifrico de comprobada actividad anticaries. Los estudios que se presentan aqui proporcionan una verificacion cuantitativa adicional de la eficacia de esta formula. En la evaluacion de la eficacia anticaries se incluyeron mediciones de la captacion de fluoruros por esmalte humano desmineralizado, cambios en la microdureza superficial del esmalte en funcion a cada producto sometido a prueba, resistencia sub-siguiente del esmalte remineralizado que fue sometido a un desafio acido secundario y el analisis micro-radiografico cuantitativo de los especimenes remineralizados. Cada parametro demostro que la pasta dental Crest proporciona un nivel mas alto de eficacia anticaries que las otras pastas fluoradas que se venden en China. Los resultados de estas pruebas son consistentes con los resultados de pruebas anteriores conducidas por el CNSB.
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