title: Abrasiveness evaluation of silica and calcium carbonate used in the production of dentifrices.
abstract: Our purpose was to apply a radiometric method to an abrasiveness evaluation in samples of silica and calcium carbonate used as an abrasive in a dentifrice, to help in a prudent selection of materials by dentifrice producers. The results of RDA (radioactive dentin abrasion) abrasiveness indices obtained for these compounds varied from 136 to 19. The relative standard deviations of these RDA results varied from 5.9% to 11.8%, showing a good precision in the method. Also, the results obtained indicated that the abrasiveness indices increase with the particle size of the material. A comparison between different abrasives with similar particle sizes showed that silica presents higher RDA values than calcium carbonate.
authors: Instituto de Pesquisas Energéticas e Nucleares, Centro de Química e Meio Ambiente, IPEN/CNEN-SP, Caixa Postal 11049, ZIP 05422-970, São Paulo, SP, Brazil.
authors: I M
authors: IM
authors: Camargo
authors: M
authors: M
authors: Saiki
authors: M B
authors: MB
authors: Vasconcellos
authors: D M
authors: DM
authors: Avila
mesh_terms: D002119:Calcium Carbonate; D003802:Dentifrices; D008422:Materials Testing; D011874:Radiometry; D012822:Silicon Dioxide; D014070:Tooth
chemical_list: D003802:Dentifrices; D012822:Silicon Dioxide; D002119:Calcium Carbonate