2020-09-182020-09-182013FONSECA, Rodrigo B. et al. Efeito de diferentes tratamentos de superfície em fibras de resina termoplástica na resistência e módulo flexural de barras de resina acrílica. Robrac: revista odontologica do Brasil Central, Goiânia, v. 22, n. 60, p. 56-60, 2013.1984-5685http://repositorio.bc.ufg.br/handle/ri/19041Objective: This study evaluated the flexural strenght and flexural modulus of reinforced acrylic resin bars with thermoplastic fibers subjected to different treatments. Material and methods: Five experimental groups were created (N = 10), with the factor under study the type of treatment surface of fibers (control without fiber (Ctrl), pure fiber (PF), silanization (Fsil), pre-impregnated with adhesive (Fimp) , silanization + pre-impregnation (Fsil/imp)). Bars (25x2x2mm) were tested for flexural strength with 3-point bending test, obtaining the values of flexural strength (FS) and flexural modulus (FM). The RF data (MPa) and MF (GPa) were submitted to ANOVA test. Results: The statistical analysis showed similarity between groups (p = 0.298 for FS, p = 0.549 for FM). For FS, it was observed: Ctrl (15614.68 ± 7119.25) A, PF (14903.31 ± 5743.65) A, Fsil (11142.47 ± 5629.92) A, Fimp (9284 ± 16365.10 60) A, Fsil/imp (11882.56 ± 3544.39) A. For FM, observed: Ctrl (3996.30 ± 2025.46) A, FP (3275.14 ± 1841.26) A, Fsil (3491.54 ± 2812.14) A, Fimp (4544.46 ± 3357 18) A, Fsil/imp (2842.16 ± 1193.13) A. Conclusion: It can be concluded that the type of surface treatment of fibers of thermoplastic resin does not provide improvements in RF and MF acrylic resin bars.porAcesso Abertohttp://creativecommons.org/licenses/by-nc-nd/3.0/us/Resinas acrílicasMicroscopia eletrônica de varreduraResistência de materiaisAcrylic resinsMaterial resistanceScanning electron microscopyArtigo