title: Evaluation of the colour change in enamel and dentine promoted by the interaction between 2% chlorhexidine and auxiliary chemical solutions.
abstract: To evaluate the colour change in enamel and dentine, promoted by interaction of 2% chlorhexidine gluconate (CHX) with 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA). Fragments containing enamel and dentine were obtained from the crowns of extracted bovine incisors. Before and after immersion of the samples in the substances, they were evaluated with reference to the colour of the enamel and dentine. The values obtained in numerical scores were subjected to statistical analysis using Wilcoxon test. A colour change in the enamel and dentine in groups treated with CHX gel + NaOCl and CHX gel + NaOCl + EDTA, and a change in colour only in the dentine in groups treated with CHX solution + NaOCl and CHX solution + NaOCl + EDTA. When used prior to NaOCl, CHX has the ability to induce a colour change in dental structures.
authors.affiliation: School of Dentistry, Pontifical Catholic University, PUCRS, Porto Alegre-RS, Brazil School of Dentistry, University of Passo Fundo, Passo Fundo-RS, Brazil Piracicaba Dental School, Campinas State University, Unicamp, Piracicaba, SP, Brazil.
authors.forename: Matheus
authors.initials: M
authors.lastname: Souza
authors.forename: Doglas
authors.initials: D
authors.lastname: Cecchin
authors.forename: Joao V B
authors.initials: JV
authors.lastname: Barbizam
authors.forename: José F A
authors.initials: JF
authors.lastname: Almeida
authors.forename: Alexandre Augusto
authors.initials: AA
authors.lastname: Zaia
authors.forename: Brenda P F A
authors.initials: BP
authors.lastname: Gomes
authors.forename: Caio C R
authors.initials: CC
authors.lastname: Ferraz
mesh_terms: D000818:Animals; D002417:Cattle; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000494:pharmacology; D003116:Color; D003743:Dental Enamel / Q000033:anatomy & histology / Q000187:drug effects*; D003804:Dentin / Q000033:anatomy & histology / Q000187:drug effects*; D004338:Drug Combinations; D004492:Edetic Acid / Q000494:pharmacology; D008422:Materials Testing; D011897:Random Allocation; D012388:Root Canal Irrigants / Q000494:pharmacology*; D012973:Sodium Hypochlorite / Q000494:pharmacology; D019228:Tooth Crown / Q000033:anatomy & histology / Q000187:drug effects; D014092:Tooth Root / Q000033:anatomy & histology / Q000187:drug effects
chemical_list: D004338:Drug Combinations; D012388:Root Canal Irrigants; D004492:Edetic Acid; D012973:Sodium Hypochlorite; C010882:chlorhexidine gluconate; D002710:Chlorhexidine
keywords: EDTA; chlorhexidine digluconate; colour change; sodium hypochlorite