MSCE  Vol.2 No.2 , February 2014
Influence of Glass Fiber wt% and Silanization on Mechanical Flexural Strength of Reinforced Acrylics
ABSTRACT

The aim is to evaluate the flexural strength of acrylic resin bars depending on the addiction of glass fibers with or without previous 3-methacryloxypropyl-trimethoxysilane (silane) application. Short fibers (3 mm) were treated and added to an acrylic resin powder, being further mixed with acrylic liquid to create bars (25 × 2 × 2 mm) of 11 experimental groups (N = 10), according to the interaction of experimental factors: weight % of glass fibers: (0.5; 1; 3; 4; 6 and 7) and silane application (with silane (S) or without silane (N)). Flexural strength and scanning microscopy evaluation were performed (SEM). Data (MPa) were submitted to ANOVA and Tukey (α = 5%). A significant difference between groups was observed (p = 0.001): S7%(128.85 ± 35.76)a, S6% (119.31 ± 11.97)ab, S4% (116.98 ± 25.23)ab, N4% (107.85 ± 24.88)abc, S1% (96.29 ± 20.65)bc, S0.5% (89.29 ± 7.33)cd, S3% (89.0 ± 11.27)cd, N3% (86.79 ± 17.63)cd, N1% (85.43 ± 16.44)cd, Control (73.29 ± 25.0)de, N0.5% (59.58 ± 19.46)e. For N groups, it was not possible to include more than 4%wt fibers. SEM showed better fiber-resin interaction for S groups, and fractures around fibers on N groups. Previous silane application enables the addiction of greater quantity of glass fibers and better interaction with the acrylic resin resulting in higher flexural strength. Without silane, fibers seem to act as initial crack points due to poor interaction.


Cite this paper
Fonseca, R. , Favarão, I. , Kasuya, A. , Abrão, M. , Luz, N. and Naves, L. (2014) Influence of Glass Fiber wt% and Silanization on Mechanical Flexural Strength of Reinforced Acrylics. Journal of Materials Science and Chemical Engineering, 2, 11-15. doi: 10.4236/msce.2014.22003.
References
[1]   T. Kanie, K. Fujii, H. Arikawaand and K. Inoue, “Flexural Properties and Impact Strength of Denture Base Polymer Reinforced with Woven Glass Fibers,” Dental Materials, Vol. 16, No. 2, 2000, pp. 150-158.
http://dx.doi.org/10.1016/S0109-5641(99)00097-4

[2]   D. C. Jagger, A. Harrisonand and K. D. Jandt, “The Reinforcement of Dentures,” Journal of Oral Rehabilitation, Vol. 26, No. 3, 1999, pp. 185-194.
http://dx.doi.org/10.1046/j.1365-2842.1999.00375.x

[3]   S. H. Foo, T. J. Lindquist, S. A. Aquilino, R. L. Schneider, D. L. Williamsonand and D. B. Boyer, “Effect of Polyaramid Fiber Reinforcement on the Strength of 3 Denture Base Polymethyl Methacrylate Resins,” Journal of Prosthodontics, Vol. 10, No. 3, 2001, pp. 148-153.
http://dx.doi.org/10.1111/j.1532-849X.2001.00148.x

[4]   D. Jagger, A. Harrison, R. Jaggerand and P. Milward, “The Effect of the Addition of Poly(methyl methacrylate) Fibres on Some Properties of High Strength Heat-Cured Acrylic Resin Denture Base Material,” Journal of Oral Rehabilitation, Vol. 30, No. 3, 2003, pp. 231-235.
http://dx.doi.org/10.1046/j.1365-2842.2003.01011.x

[5]   J. John, S. A. Gangadharand and I. Shah, “Flexural Strength of Heat-Polymerized Polymethyl Methacrylate Denture Resin Reinforced with Glass, Aramid, or Nylon Fibers,” Journal of Prosthetic Dentistry, Vol. 86, No. 4, 2001, pp. 424-427.
http://dx.doi.org/10.1067/mpr.2001.118564

[6]   S. R. Dyer, L. V. Lassila, M. Jokinenand and P. K. Vallittu, “Effect of Fiber Position and Orientation on Fracture Load of Fiber-Reinforced Composite,” Dental Materials, Vol. 20, No. 10, 2004, pp. 947-955.
http://dx.doi.org/10.1016/j.dental.2003.12.003

[7]   L. V. Lassilaand and P. K. Vallittu, “The Effect of Fiber Position and Polymerization Condition on the Flexural Properties of Fiber-Reinforced Composite,” Journal of Contemporary Dental Practice, Vol. 5, No. 2, 2004, pp. 14-26.

[8]   P. K. Vallittu, “A Review of Fiber-Reinforced Denture Base Resins,” Journal of Prosthodontics, Vol. 5, No. 4, 1996, pp. 270-276.
http://dx.doi.org/10.1111/j.1532-849X.1996.tb00511.x

[9]   H. D. Stipho, “Repair of Acrylic Resin Denture Base Reinforced with Glass Fiber,” Journal of Prosthetic Dentistry, Vol. 80, No. 5, 1998, pp. 546-550.
http://dx.doi.org/10.1016/S0022-3913(98)70030-7

[10]   P. K. Vallittu, V. P. Lassilaand and R. Lappalainen, “Acrylic Resin-Fiber Composite. Part I: The Effect of Fiber Concentration on Fracture Resistance,” Journal of Prosthetic Dentistry, Vol. 71, No. 6, 1994, pp. 607-612.
http://dx.doi.org/10.1016/0022-3913(94)90446-4

[11]   T. A. Hamza, S. F. Rosenstiel, M. M. El-Hosaryand and R. M. Ibraheem, “Fracture Resistance of Fiber-Reinforced PMMA Interim Fixed Partial Dentures,” Journal of Prosthodontics, Vol. 15, No. 4, 2006, pp. 223-228.
http://dx.doi.org/10.1111/j.1532-849X.2006.00110.x

[12]   G. A. Geerts, J. H. Overturfand and T. G. Oberholzer, “The Effect of Different Reinforcements on the Fracture Toughness of Materials for Interim Restorations,” Journal of Prosthetic Dentistry, Vol. 99, No. 6, 2008, pp. 461467. http://dx.doi.org/10.1016/S0022-3913(08)60108-0

[13]   P. K. Vallittu, “The Effect of Void Space and Polymerization Time on Transverse Strength of Acrylic-Glass Fibre Composite,” Journal of Oral Rehabilitation, Vol. 22, No. 4, 1995, pp. 257-261.
http://dx.doi.org/10.1111/j.1365-2842.1995.tb00083.x

[14]   P. K. Vallittu, “Comparison of Two Different Silane Compounds Used for Improving Adhesion between Fibres and Acrylic Denture Base Material,” Journal of Oral Rehabilitation, Vol. 20, No. 5, 1993, pp. 533-539.
http://dx.doi.org/10.1111/j.1365-2842.1993.tb01640.x

[15]   S. K. Garoushi, L. V. Lassilaand and P. K. Vallittu, “Short Fiber Reinforced Composite: The Effect of Fiber Length and Volume Fraction,” Journal of Contemporary Dental Practice, Vol. 7, No. 5, 2006, pp. 10-17.

[16]   M. Behr, M. Rosentritt, R. Langand and G. Handel, “Flexural Properties of Fiber Reinforced Composite Using a Vacuum/Pressure or a Manual Adaptation Manufacturing Process,” Journal of Dentistry, Vol. 28, No. 7, 2000, pp. 509-514.
http://dx.doi.org/10.1016/S0300-5712(00)00031-2

[17]   O. M. Dogan, G. Bolayir, S. Keskin, A. Doganand and B. Bek, “The Evaluation of Some Flexural Properties of a Denture Base Resin Reinforced with Various Aesthetic Fibers,” Journal of Materials Science: Materials in Medicine, Vol. 19, No. 6, 2008, pp. 2343-2349.
http://dx.doi.org/10.1007/s10856-007-3343-8

[18]   T. M. Chenand and G. M. Brauer, “Solvent Effects on Bonding Organo-Silane to Silica Surfaces,” Journal of Dental Research, Vol. 61, No. 12, 1982, pp. 1439-1443.
http://dx.doi.org/10.1177/00220345820610121301

[19]   P. K. Vallittu, “Curing of a Silane Coupling Agent and Its Effect on the Transverse Strength of Autopolymerizing Polymethylmethacrylate-Glass Fibre Composite,” Journal of Oral Rehabilitation, Vol. 24, No. 2, 1997, pp. 124130. http://dx.doi.org/10.1046/j.1365-2842.1997.00464.x

[20]   V. D. Kamble, R. D. Parkhedkarand and T. K. Mowade, “The Effect of Different Fiber Reinforcements on Flexural Strength of Provisional Restorative Resins: An In-Vitro Study,” Journal of Advanced Prosthodontics, Vol. 4, No. 1, 2012, pp. 1-6. http://dx.doi.org/10.4047/jap.2012.4.1.1

[21]   T. K. Mowade, S. P. Dange, M. B. Thakreand and V. D. Kamble, “Effect of Fiber Reinforcement on Impact Strength of Heat Polymerized Polymethyl Methacrylate Denture Base Resin: In Vitro Study and SEM Analysis,” Journal of Advanced Prosthodontics, Vol. 4, No. 1, 2012, pp. 3036. http://dx.doi.org/10.4047/jap.2012.4.1.30

[22]   Organization IS, ISO 4049, “Dentistry–Polymer Based Filling, Restorative and Luting Materials,” 2000.

[23]   H. D. Stipho, “Effect of Glass Fiber Reinforcement on Some Mechanical Properties of Autopolymerizing Polymethyl Methacrylate,” Journal of Prosthetic Dentistry, Vol. 79, No. 5, 1998, pp. 580-584.
http://dx.doi.org/10.1016/S0022-3913(98)70180-5

[24]   G. S. Solnit, “The Effect of Methyl Methacrylate Reinforcement with Silane-Treated and Untreated Glass Fibers,” Journal of Prosthetic Dentistry, Vol. 66, No. 3, 1991, pp. 310-314.
http://dx.doi.org/10.1016/0022-3913(91)90255-U

[25]   R. C. Petersen, “Discontinuous Fiber-Reinforced Composites above Critical Length,” Journal of Dental Research, Vol. 84, No. 4, 2005, pp. 365-370.
http://dx.doi.org/10.1177/154405910508400414

[26]   C. Shen, W. S. Ohand and J. R. Williams, “Effect of Post-Silanization Drying on the Bond Strength of Composite to Ceramic,” Journal of Prosthetic Dentistry, Vol. 91, No. 5, 2004, pp. 453-458.
http://dx.doi.org/10.1016/j.prosdent.2004.03.007

[27]   N. Barghi, T. Berryand and K. Chung, “Effects of Timing and Heat Treatment of Silanated Porcelain on the Bond Strength,” Journal of Oral Rehabilitation, Vol. 27, No. 5, 2000, pp. 407-412.
http://dx.doi.org/10.1046/j.1365-2842.2000.00508.x

 
 
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