Temporary, pharmacologically-inactive dental coating for the...

A - Human Necessities – 61 – K

Patent

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A61K 6/02 (2006.01) A61K 6/00 (2006.01) A61K 6/083 (2006.01) A61K 9/00 (2006.01)

Patent

CA 2510152

Topical application of a pharmacologically-inactive, inert polymeric solution to teeth affords a temporary, protective barrier for pharmacologically-active compounds that have been previously applied topically to the tooth surfaces for caries reduction. In a method of use, an aqueous dispersion polymethylmethacrylate (PMMA) and a suitable plasticizer are applied topically to the tooth surface immediately after the topical application of chlorhexidine or fluoride. The inert coating thus formed is distinct from any pharmacologically-active substance, and remains on the tooth surface until abraded by the chewing of hard foods. In a composition of matter, the solution contains ammonio methacrylate copolymer, type B USP/NF of between 20% and 35% w/w; triethyl citrate USP/NF of between 1% and 10% w/w; and purified water of between 60% and 70% w/w. The ammonio methacrylate copolymer is preferably EUDRAGIT RS 30 D brand available form Rohm GmbH.

L'invention concerne l'application topique sur les dents d'une solution polymère inerte et pharmacologiquement inactive pour créer une barrière de protection temporaire pour des composés pharmacologiquement actifs, lesquels ont fait l'objet d'une application topique préalable sur la surface des dents afin de réduire les caries. Dans un mode de réalisation, une dispersion aqueuse de polyméthylméthacrylate (PMMA) et un plastifiant adapté sont appliqués de manière topique sur la surface des dents immédiatement après l'application topique de chlorhexidine ou de fluorure. L'enrobage inerte ainsi formé se distingue de toute substance pharmacologiquement active et il reste à la surface des dents jusqu'à la mastication d'aliments solides. Dans une composition de la présente invention, la solution contient un copolymère ammonio méthacrylate, de type B USP/NF pour 20 à 35 % en poids, du citrate de triéthyle USP/NF pour 1 à 10 % en poids, et de l'eau purifiée pour 60 à 70 % en poids. Le copolymère ammonio méthacrylate est de préférence le produit EUDRAGIT RS 30 D de la société Rohm GmbH.

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