Efeito de diferentes tratamentos de superfície em fibras de resina termoplástica na resistência e módulo flexural de barras de resina acrílica
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Data
2013
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Resumo
Objective: 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.
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Resinas acrílicas, Microscopia eletrônica de varredura, Resistência de materiais, Acrylic resins, Material resistance, Scanning electron microscopy
Citação
FONSECA, 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.