Influência do comprimento e tratamento superficial de fibras de vidro na resistência flexural de barras de resina acrílica
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Data
2013
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Resumo
Objective: This study evaluated the flexural strength of
acrylic resin bars by varying the surface treatment and the
length of glass fiber. Material and Methods: Nine experimental
groups were established (N = 10), with factors in study the
length of the pure glass fiber (Unidirectional 23mm (Uni23) and
short 3mm (Pic3)) and the type of surface treatment (untreated
(Ctrl), silanization (Sil), impregnation with BisGMA adhesive
(Imp) and silanization + impregnation with BisGMA adhesive
(Imp / Sil)). Samples (25x2x2 mm) were produced and tested at
0.5 mm / min ontaining flexural strength values in MPa. Results:
Statistical analysis showed a significant difference (p = 0.001) for
the factors: surface treatment (Imp: 297.95 ± 73.86 A; Sil / Imp:
265.3 ± 64.21 AB; Sil: 229.2 ± 72.47 B; control: 164.9 ± 34.92 C)
and fiber length (Uni23: 266.5 ± 89.57 a; Pic3: 212.17 ± 57.31 b).
The interaction between the two factors in the study showed no
statistically significant difference (p = 0.098). Conclusion: Glass
fibers, independent of its length, promotes a significant reinforcement
of acrylic resins when its surface are treated with bis-
-GMA adhesive, silane or a combination of both.
Descrição
Palavras-chave
Resistência de materiais, Fibras de vidro, Resinas acrílicas, Material resistance, Acrylic resins, Glass fibers
Citação
FONSECA, Rodrigo B. Fonseca et al. Influência do comprimento e tratamento superficial de fibras de vidro na resistência flexural de barras de resina acrílica. Robrac: revista odontologica do Brasil Central, Goiânia, v. 21, n. 61, p. 76-79, 2013.