In:
The Scientific World Journal, Hindawi Limited, Vol. 2015 ( 2015), p. 1-8
Abstract:
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 × 2 mm) 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 , and Control HC ( 93.39 ± 39.61 ) d . SEM analysis showed better fiber-resin interaction for HC. Nonimpregnated fibers, irrespective of their length, tend to improve fracture strength of acrylics.
Type of Medium:
Online Resource
ISSN:
2356-6140
,
1537-744X
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2015
detail.hit.zdb_id:
2075968-X
