title: Mechanical properties of silorane-based and methacrylate-based composite resins after artificial aging.
abstract: The aim of this study was to compare the compressive strength of a silorane-based composite resin (Filtek P90) to that of conventional composite resins (Charisma, Filtek Z250, Fill Magic, and NT Premium) before and after accelerated artificial aging (AAA). For each composite resin, 16 cylindrical specimens were prepared and divided into 2 groups. One group underwent analysis of compressive strength in a universal testing machine 24 hours after preparation, and the other was subjected first to 192 hours of AAA and then the compressive strength test. Data were analyzed by analysis of variance, followed by the Tukey HSD post hoc test (α = 0.05). Some statistically significant differences in compressive strength were found among the commercial brands (P < 0.001). The conventional composite resin Fill Magic presented the best performance before (P < 0.05) and after AAA (P < 0.05). Values for compressive strength of the silorane-based composite were among the lowest obtained, both before and after aging. Comparison of each material before and after AAA revealed that the aging process did not influence the compressive strength of the tested resins (P = 0.785).
authors.forename: Denise Tornavoi
authors.initials: DT
authors.lastname: de Castro
authors.forename: César Penazzo
authors.initials: CP
authors.lastname: Lepri
authors.forename: Mariana Lima da Costa
authors.initials: ML
authors.lastname: Valente
authors.forename: Andréa Cândido
authors.initials: AC
authors.lastname: dos Reis
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D008689:Methacrylates / Q000737:chemistry*; D062047:Silorane Resins / Q000737:chemistry*; D013997:Time Factors
chemical_list: C084111:Charisma composite resin; D003188:Composite Resins; C481898:Fill Magic; C444701:Filtek Z250; D008689:Methacrylates; D062047:Silorane Resins; C544925:filtek P90
keywords: accelerated artificial aging; composite resin; compressive strength; silorane