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-38-everXPosterior2405 Flexural Toughness Measurement of Fiber Reinforced CompositesOral Presentation2:45 PM–3:00 PM Mar 24, 2017CC, Room 3024Authors:Authors:BeomPark (Presenter)Henry M. Goldman School of Dental Medicine,BostonUniversityYuweiFan, Henry M. Goldman School of Dental Medicine,BostonUniversityDan Nathanson, Henry M. Goldman School of Dental Medicine,BostonUniversityAbstract: Objectives: Fiber reinforced composite has been commercialized as universal and flowableresin based composite.Theobjective of this study is to test and compare flexural toughness of several based composite.Theobjective of this study is to test and compare flexural toughness of several dental composite products.Methods: Four products were tested in this study, including: GC everXPosterior (EXP), 3M ESPE FiltekSupreme Ultra Universal (FSU), 3M ESPE FiltekSupreme Ultra Flowable(FSF), NanovaBiomaterials NovaproFlowable(NPF), NanovaBiomaterials NovaproUniversal (NPU), Prime Dental Manufacturing Prime-dent flowable(PDF). NovaProcontains hydroxyapatitenanofiberas filler and everXhas glass fiber as filler. Materials were tested by creating specimens in two configurations using metallic molds (n=5 or 10/group). Flexural toughness specimens were rectangles 2.5×5×25mm with a slot and V-notch of 1x2.4mm with at the central edge. All rectangles 2.5×5×25mm with a slot and V-notch of 1x2.4mm with at the central edge. All specimens were made following manufacturer’s instructions under 1200mW/cm2light-curing. After setting and de-molding, specimens were kept in 37oC water for 72 hours. Testing was performed on an Instronmachine (Model 5566A) with a three point bending fixture at a cross-head speed of 0.25 mm/sec and V-notch faced to tensile side. One-way ANOVA post hoc TukeyHST (JMP Pro 12.0.) was used for data analysis (significance level = 0.05).Results: Fracture toughness results are shown in Table 1. There was significant difference among groups.Conclusions: Composites with fiber fillers showed significant higher fracture toughness.Conclusions: Composites with fiber fillers showed significant higher fracture toughness.Table(s):MaterialFracture toughness, MPa-m^0.5GC EverX2.10±0.18ANovaPro Univ1.49±0.10BFiltek Univ1.44±0.04BCNovaPro Flow1.30±0.16BCFiltek Flow1.13±0.06CSignificanceStudent PresenterDisclosure Statement:The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: N/AI have read the IADR policy on licensing.Filtek Flow1.13±0.06CPrimeDent0.86±0.03DI have read the IADR policy on licensing.Signed by BeomParkReprinted with permission from the Journal of Dental Research, J Dent Res 96 (Spec Iss A):-38-abstract number 2405, https://iadr2017.zerista.com/event/member/330073, 2017

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