title: Micro energy-dispersive X-ray fluoresence mapping of enamel and dental materials after chemical erosion.
abstract: Energy-dispersive X-ray fluorescence was employed to test the hypothesis that beverage consumption or mouthwash utilization will change the chemical properties of dental materials and enamel mineral content. Bovine enamel samples (n = 45) each received two cavity preparations (n = 90), each pair filled with one of three dental materials (R: nanofilled composite resin; GIC: glass-ionomer cement; RMGIC: resin-modified GIC). Furthermore, they were treated with three different solutions (S: saliva; E: erosion/Pepsi Twist®; or EM: erosion+mouthwash/Colgate Plax®). It was found that mineral loss in enamel was greater in GICE samples than in RE > RMGICE > RMGICEM > REM > GICEM. An increased percentage of Zr was found in REM indicating organic matrix degradation. Dental materials tested (R, GIC, and RMGIC) were not able to protect adjacent enamel from acid erosion by the soft drink tested. The use of mouthwash promoted protection of enamel after erosion by the soft drink. To avoid chemical dissolution by mouthwashes, protection by resin composites with surface sealants is recommended.
authors.affiliation: Universidade do Vale do Paraíba, UNIVAP, Research and Development Institute, IP&D Laboratory of Biomedical Vibrational Spectroscopy, LEVB, São José dos Campos, São Paulo, Brazil. lesoares@univap.br
authors.forename: Luís Eduardo Silva
authors.initials: LE
authors.lastname: Soares
authors.forename: Rodrigo
authors.initials: R
authors.lastname: de Oliveira
authors.forename: Sídnei
authors.initials: S
authors.lastname: Nahórny
authors.forename: Ana Maria do Espírito
authors.initials: AM
authors.lastname: Santo
authors.forename: Airton Abrahão
authors.initials: AA
authors.lastname: Martin
mesh_terms: D000818:Animals; D002417:Cattle; D003743:Dental Enamel / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D014070:Tooth / Q000737:chemistry*
chemical_list: D003764:Dental Materials