title: Effect of carbon and glass fiber posts on the flexural strength and modulus of elasticity of a composite resin.
abstract: The aim of this study was to evaluate the effect of prefabricated fiber posts on the flexural strength and modulus of elasticity of a composite resin. Thirty bar-shaped specimens measuring 25 x 2.0 x 2.0 mm were made, containing posts that were 1.3 mm in diameter and 20 mm long. Each group contained 10 specimens: Group 1, resin without post; Group 2, resin with carbon fiber post; Group 3, resin with glass fiber post. The samples were immersed in water at 37 degrees C until the three-point loading test was performed at a speed of 1.0 mm/minute. The results were statistically analyzed by ANOVA and Tukey's test (P = 0.05). Both fiber posts were similar in strength and both were stronger than the control. Group 3 obtained a higher mean modulus of elasticity than Groups 1 and 2, which were similar. The results of this study demonstrated that the presence of a fiber post significantly raised flexural strength values and the glass fiber post significantly increased the modulus of elasticity of the evaluated composite resin.
authors: School of Dentistry, University of Southern Santa Catarina, Tubarao, SC, Brazil.
authors: Jefferson Ricardo
authors: JR
authors: Pereira
authors: Jonas Alves
authors: JA
authors: de Oliveira
authors: Accacio Lins
authors: AL
authors: do Valle
authors: Lucas Villaca
authors: LV
authors: Zogheib
authors: Paulo Martins
authors: PM
authors: Ferreira
authors: Luiz Gustavo Cavalcanti
authors: LG
authors: Bastos
mesh_terms: D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D055119:Elastic Modulus; D004853:Epoxy Resins / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D018583:Pliability; D011176:Post and Core Technique / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D000077482:Carbon Fiber; D003188:Composite Resins; D003764:Dental Materials; D004853:Epoxy Resins; C083568:Z100 composite resin; C009753:fiberglass; D014867:Water; D002244:Carbon; D012822:Silicon Dioxide; D015040:Zirconium