title: Effects of rotating fatigue on the mechanical properties of microhybrid and nanofiller-containing composites.
abstract: The objective of this study was to assess and compare the flexural strength and Vickers hardness of five nanofiller-containing composites (Filtek Supreme XT, Gradia Forte, Luna-Wing, GNH400N, GCUC) against five microhybrid composites (Meta Color Prime Art, Solidex, Estenia C&B, Ceramage, Clearfil Majesty) before and after rotating fatigue test (RFT). For each resin composite, 16 rectangular beam specimens (2 mm × 2 mm × 25 mm) were prepared and half of which were subjected to 1 × 10(4) cycles in RFT. Flexural strength was determined using a three-point bending test. Vickers hardness measurements were carried out on specimens which failed after the three-point bending test. When under the influence of rotating fatigue, the flexural strength of all composites was affected by multiple factors. In contrast, rotating fatigue had no significant influence on the Vickers hardness of both microhybrid and nanofiller-containing composites.
authors.affiliation: School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou, Fujian, 350002, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Lin
authors.forename: Minglei
authors.initials: M
authors.lastname: Sun
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zheng
authors.forename: Akikazu
authors.initials: A
authors.lastname: Shinya
authors.forename: Jianmin
authors.initials: J
authors.lastname: Han
authors.forename: Hong
authors.initials: H
authors.lastname: Lin
authors.forename: Gang
authors.initials: G
authors.lastname: Zheng
authors.forename: Akiyoshi
authors.initials: A
authors.lastname: Shinya
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D003799:Dental Stress Analysis; D006244:Hardness; D008422:Materials Testing; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D010316:Particle Size; D018583:Pliability; D012399:Rotation; D018709:Statistics, Nonparametric; D013718:Tensile Strength
chemical_list: D003188:Composite Resins