Dental compositions containing nanometer- sized...

A - Human Necessities – 61 – K

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A61K 6/083 (2006.01)

Patent

CA 2621018

A method of applying a dental sealant composition to a surface of a tooth or dental restoration is provided. The method involves the steps of providing a sealant composition comprising a filler system of colloidal silica particles dispersed within a methacrylate or acrylate resin and a polymerization system capable of being activated by light. The nanometer-sized silica particles have an average particle size of about 10 nm to about 100 nm. The composition is irradiated with light, preferably blue visible light having a wavelength in the range of about 400 to about 500 nm, so that it hardens. The hardened sealants provide a strong, non-tacky surface finish over a dental restoration or tooth.

Cette invention concerne une méthode d'application d'une résine de scellement dentaire sur la surface d'une dent ou sur une restauration dentaire. Cette méthode englobe les opérations suivantes: application d'une composition de résine de scellement constituée d'une charge de particules de silice colloïdale dispersées dans une résine de méthacrylate ou d'acrylate et d'un système de polymérisation à photo-activation. Les particules de silice de l'ordre du nanomètre ont une taille moyenne comprise entre 10 et 100 nm environ. La composition est irradiée et durcie avec de la lumière, de préférence de la lumière bleutée visible d'une longueur d'onde comprise entre 400 et 500 nm environ. La résine durcie constitue un fini de surface robuste et non collant sur la restauration dentaire ou sur la résine de scellement.

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