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Title: Flexural strength and modulus of elasticity of different types of resin based composites
Other Titles: Resistência à flexão e módulo de elasticidade de diferentes tipos de resina composta
Authors: Rodrigues Júnior, Sinval Adalberto
Zanchi, Cesar Henrique
Carvalho, Rodrigo Varella de
Demarco, Flávio Fernando
Abstract: The aim of the study was to test whether the filler composition of resin composites influences their flexural strength and modulus of elasticity. Flexural strength and modulus of elasticity were obtained through a three-point bending test. Twelve bar shaped specimens of 5 commercially available composites – Supreme (3M/ESPE), a universal nanofilled composite; Esthet-X (Dentsply), Z-250 (3M/ESPE), Charisma (Heraeus Kulzer), universal hybrid composites; and Helio Fill (Vigodent), a microfine composite – were confectioned according to the ISO 4049/2000 specifications. The test was performed after a 7- days storage time using a universal test machine with a crosshead speed of 1 mm/min. The filler weight content was determined by the ashing technique. The data obtained on the mechanical properties were submitted to ANOVA and Tukey test (p < 0.05). Pearson’s correlation test was used to determine the correlation between the filler content and the mechanical properties. A weak but significant correlation between the mechanical properties evaluated and the filler weight content was observed (p < 0.000). The microfine composite presented the lowest filler weight and the lowest mechanical properties. Statistically different flexural strength and modulus of elasticity results were observed among the universal hybrid composites. The nanofilled composite presented intermediary results. Within the limitations of this in vitro study, it could be concluded that the filler content significantly interfered in the flexural strength and modulus of elasticity of the composites tested.
Keywords: Composite resins
Physical and chemical properties
Inorganic particles
Publisher: Sociedade Brasileira de Pesquisa Odontológica
Citation: RODRIGUES JÚNIOR, Sinval Adalberto; ZANCHI, Cesar Henrique; CARVALHO, Rodrigo Varella de; DEMARCO, Flávio Fernando. Flexural strength and modulus of elasticity of different types of resin-based composites. Brazilian Oral Research, v. 21, p. 16-21, 2007.
Issue Date: 2007
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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