The influence of polymerization type and reinforcement method on flexural strength of acrylic resin
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2015
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The aim of this study was to evaluate the flexural strength of acrylic resin bars by varying the types of resin polymerization and
reinforcement methods. Fourteen groups (𝑁 = 10) were created by the interaction of factors in study: type of resin (self-cured
(SC) or heat-cured (HC)) and reinforcement method (industrialized glass fiber (Ind), unidirectional glass fiber (Uni), short glass
fiber (Short), unidirectional and short glass fiber (Uni-Short), thermoplastic resin fiber (Tpl), and steel wire (SW)). Reinforced bars
(25×2×2mm) were tested in flexural strength (0.5 mm/min) and examined by scanning electron microscopy (SEM). Data (MPa)
were submitted to factorial analysis, ANOVA, and Tukey and T-student tests (𝑎 = 5%) showing significant interaction (𝑃 = 0.008),
for SC:Uni (241.71±67.77)a,Uni-Short (221.05±71.97)a, Ind(215.21±46.59)ab, SW(190.51±31.49)abc, Short (156.31±28.76)bcd, Tpl
(132.51±20.21)cd, Control SC(101.47±19.79)d and for HC: Ind (268.93±105.65)a, Uni (215.14±67.60)ab, Short (198.44±95.27)abc,
Uni-Short (189.56±92.27)abc, Tpl (161.32±62.51)cd, SW(106.69±28.70)cd, andControl HC(93.39±39.61)d. SEManalysis showed
better fiber-resin interaction for HC. Nonimpregnated fibers, irrespective of their length, tend to improve fracture strength of
acrylics.
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FONSECA, Rodrigo Borges et al. The influence of polymerization type and reinforcement method on flexural strength of acrylic resin. Scientific World Journal, London, v. 2015, p. 1-8, 2015.