C.S. Kurniawati, D. Rachmawati, D. Mas'Adah
Restorative materials used in dentistry should have aesthetic appeal and good strength for use in restorations on anterior and posterior teeth. Nanohybrid resin composite is a composite resin with nano-filler particles having both aesthetic appeal and good durability against fracture. The newest composite resin, fiber-reinforced composite, comprises resin matrix, E-glass fiber and organic particulate filler. Composite resins with E-glass fibers are expected to have higher fracture toughness values than composite resins without E-glass fibers. This research aimed to study the difference in the fracture toughness between nanohybrid resin composite and fiber-reinforced composite. Twenty samples were divided into 2 groups: Group I-nanohybrid resin composite and group II-fiber-reinforced composite. Each sample was applied incrementally on a glass mould and individually exposed to light for cure stiffening for 20 s. Before polymerisation of the second layer, the central part of the sample was given a sharp crack. The sample was then maintained at 37°C for 48 h, followed by testing for fracture toughness by the universal testing machine specification. Independent t-test revealed significant differences in fracture toughness values between the two groups (p = 0,000). © Published under licence by IOP Publishing Ltd.
Faculty of Dentistry, Universitas Brawijaya, Malang, 65145, Indonesia
