title: Colour stability, opacity and cross-link density of composites submitted to accelerated artificial aging.
abstract: The study evaluated the influence of accelerated artificial aging on colour stability, opacity and cross-link density of resin-based composites (RBCs). Seven specimens were obtained of five RBCs (Heliomolar, 4 Seasons, Tetric Evo Ceram, SR Adoro), which were submitted to colour stability and opacity analysis and cross-link density evaluation. All tests were performed before and after aging. After statistical analysis (one-way ANOVA; Tukey; p<0.05), it was observed that QuiXfil and SR Adoro presented colour alteration values above those that are clinically acceptable (deltaE=5.77 and 4.34 respectively) and the variation in opacity was lowest for SR Adoro. There was an increase in the cross-link density of all studied materials after aging.
authors.affiliation: Faculdade de Odontologia de Ribeirao Preto-USP, Departamento de Materiais Dentários e Prótese, FORP-USP, Ribeirao Preto, Sao Paulo, Brasil.
authors.forename: Fabrício Mariano
authors.initials: FM
authors.lastname: Mundim
authors.forename: Fernanda de Carvalho Panzeri
authors.initials: Fde C
authors.lastname: Pires-de-Souza
authors.forename: Lucas da Fonseca Roberti
authors.initials: Lda F
authors.lastname: Garcia
authors.forename: Simonides
authors.initials: S
authors.lastname: Consani
mesh_terms: D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003799:Dental Stress Analysis; D006244:Hardness; D015394:Molecular Structure; D055620:Optical Phenomena; D010316:Particle Size; D013997:Time Factors
chemical_list: D003188:Composite Resins