title: ["In vitro" analysis of root dentin permeability during endodontic instrument use, as a function of change of instruments and number of times used].
abstract: The increase of dentinal permeability is a very important issue related to root canal disinfection. Beside the auxiliary substance used for the chemical/mechanical preparation, time and type of instruments were also considered. Based on these facts, we have studied the percentage of dentinal penetration of a stain (Patent blue V), in recently extracted teeth. By this way, areas of tooth hemisection and dentinal stain penetration could be assessed. Two different brands of type Kerr files (kerr and Maillefer) and a type K-Flex file were used for root canal preparation. They were used with the Endo PTC as an auxiliary chemical substance. The number of time used by each file was also considered. Results have shown no significant statistical differences of percentage of dentin stained, when different instruments were used. Less stain penetration could be observed when an increase of instrument action was placed, mainly observed in the apical area and tooth hemisection.
authors.forename: A A
authors.initials: AA
authors.lastname: Maranhão de Moura
authors.forename: J
authors.initials: J
authors.lastname: Gustavo de Paiva
mesh_terms: D003806:Dentin Permeability; D006801:Humans; D012390:Root Canal Therapy / Q000295:instrumentation*; D014088:Tooth Permeability
vernacular_title: Analise "in vitro" da permeabilidade dentinária radicular quando do emprego de instrumentos endodônticos, tendo como fonte de variação o instrumento e o número de uso: contribuição para o estudo.