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 AbertoResinas acrílicasMicroscopia eletrônica de varreduraResistência de materiaisAcrylic resinsMaterial resistanceScanning electron microscopyArtigo