Flexural properties of acrylic resin polymers reinforced with unidirectional and woven glass fibers

Objective: To evaluate the effect of three different types of reinforcements on the flexural strength of a chemically activated acrylic resin.Materials and Methods: A Universal test machine EMIC 2000 was used at a speed of 5mm/min., to evaluate the flexural strength of 40 test specimens (65mm X 10mm X 3mm) fabricated of chemically activated acrylic resin, distributed into the following four groups: (1) control – without reinforcement; (2) reinforced with 0.7mm stainless steel orthodontic wire; (3) reinforced with Fibrex-lab® glass fiber and; (4) reinforced with Perma-Fiber®glass fiber.Results: The following flexural strength values were obtained: Group 1 – 80.60 MPa; Group 2 – 95.96 MPa; Group 3 – 105.70 MPa; and Group 4 – 108.70 MPa. The analysis of variance (p < 0.05) showed significant difference among the groups and the Tukey test showed that the control group presented the worst behavior, followed by reinforcement with metal wire, which showed statistically similar results to those of Group 3, with no difference shown between the fiber groups.Conclusion: Reinforcement with glass fibers present better flexural strength in comparison with the other methods.

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“…Nevertheless, these values are in contrast to the values described by Wang et al [7] (55.41 MPa) and Vallittu [19] (58.00 MPa).…”

Section: Discussioncontrasting

confidence: 86%

“…Concentrations by weight as high as 21% to 45.4% for glass fibers have been associated with an increase in resistance and rigidity of these polymers when reinforced with these fibers [19,24,25,27]. This fact could explain the significant increase in flexural resistance with the unidirectional Fibrex-Lab® and Perma fiber® fibers were used.…”

Section: Discussionmentioning

confidence: 99%

Analysis of flexural strength of a self cured acrylic resin used for fabricating provisional restorations with three different types of reinforcements

Olivieri

Costa

Miranda

et al. 2013

BDS

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“…The first studies using fiber-reinforced composites (FRCs) in medicine and dentistry occurred in the early 1960s, but more extensive research started in the early 1990s which led to introduction of FRCs as reconstructive material for damaged dental hard tissues [14][15][16][17][18]. The first approved surgical applications were found in cranial surgery [18].…”

Section: Introductionmentioning

confidence: 99%

Bioactive glass-containing cranial implants: an overview

Vallittu

2017

J Mater Sci

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Although metals have successfully been used as implants for decades, devices made out of metals do not meet all clinical requirements. For example, metal objects may interfere with some medical imaging systems (computer tomography, magnetic resonance imaging), while their stiffness also differs from natural bone and may cause stress-shielding and over-loading of bone. There has been a lot of development in the field of composite biomaterial research, which has focused to a large extent on biodegradable composites. This overview article reviews the rationale of using glass fiber-reinforced composite-bioactive glass (FRC-BG) in cranial implants. For this overview, published scientific articles with the search term ''bioactive glass cranial implant'' were collected for having basis to introduce a novel design of composite implant, which contains bioactive glass. Additional scientific information was based on articles in the fields of chemistry, engineering sciences and dentistry. Published articles of the material properties, biocompatibility and possibility to add bioactive glass to the FRC-BG implants alongside with the clinical experience as far suggest that there is a clinical need for bioactive nonmetallic implants. In the FRC-BG implants, biostable glass fibers are responsible for the load-bearing capacity of the implant, while the dissolution of the bioactive glass particles supports osteogenesis and vascularization and provides antimicrobial properties for the implant. Material combination of FRC-BG has been used clinically in cranioplasty and cranio-maxillo-facial implants, and they have been investigated also as oral and orthopedic implants. Material combination of FRC-BG has successfully been introduced to be a potential implant material in cranial surgery.

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“…The choice of a suitable material for intraradicular retainers is still controversial and generates discussion in the dental community [2][3][4][5][6] . In addition to retention, one of the important requirements of intraradicular retainers is their effect in terms of homogeneous distribution of stress on the restored assembly.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to retention, one of the important requirements of intraradicular retainers is their effect in terms of homogeneous distribution of stress on the restored assembly. Accordingly, fiber reinforced composite (hereon: fiber) posts seem to better fulfill this biomechanical aspect, as they have a Young's modulus similar to dentin 1,[3][4][5] . The fact that these materials are also more biomechanically compatible also contributes to reduce the risk of root fracture [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Fiber-matrix integrity, micromorphology and flexural strength of glass fiber posts: Evaluation of the impact of rotary instruments

Pereira

Lançanova

Wandscher

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

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Several rotary instruments have been daily employed on clinic to promote cut aiming to adjust the length of fiber posts to the radicular conduct, but there is no information on the literature about the effects of the different rotary instruments and its impact on the micromorphology of surface and mechanical properties of the glass fiber post. This study aimed the impact of rotary instruments upon fiber-matrix integrity, micromorphology and flexural-strength of glass-fiber posts (GFP). GFP (N=110) were divided into 5 groups: Ctrl: as-received posts, DBc: coarse diamond-bur, DBff: extra-fine diamond-bur, CB: carbide-bur, DD: diamond-disc. Cutting procedures were performed under abundant irrigation. Posts exposed to rotary instruments were then subjected to 2-point inclined loading test (compression 45°) (n=10/group) and 3-point flexural-strength test (n=10/group). Fiber-matrix integrity and micromorphology at the cut surface were analyzed using a SEM (n=2/group). Cutting procedures did not significantly affect the 2-point (51.7±4.3-56.7±5.1 MPa) (p=0.0233) and 3-point flexural-strength (671.5±35.3-709.1±33.1 MPa) (p=0.0968) of the posts (One-way ANOVA and Tukey s test). Fiber detachment was observed only at the end point of the cut at the margins of the post. Cut surfaces of the CB group were smoother than those of the other groups. After 3-point flexural strength test, fiber-matrix separation was evident at the tensile side of the post. Rotary instruments tested with simultaneous water-cooling did not affect the resistance of the tested fiber posts but caused disintegration of the fibers from the matrix at the end of the cut, located at the margins. VALANDRO; Email: lfvalandro@hotmail.com Tel: (55) Fax: (55) 55-3220-927 2 ABSTRACTThis study assessed the impact of rotary instruments upon fiber-matrix integrity, micromorphology and flexural strength of glass fiber posts (GFP). Glass fiber posts (N=110) were divided into 5 groups: Ctrl: Asreceived posts, DBc: Coarse diamond bur, DBff: Extra-fine diamond bur, CB: Carbide bur, DD: Diamond disc. Cutting procedures were performed under abundant irrigation. Posts exposed to rotary instruments were then subjected to 2-point (compression 45°) (n=10/group) and 3-point flexural strength (n=10/group).Fiber-matrix integrity and micromorphology at the cut surface were analyzed using a Scanning Electron Microscope (n=2/group). Cutting procedures did not significantly affect the 2-point (51.7±4.3 -56.7±5.1 MPa) (p=0.0233) and 3-point flexural strength (671.5±35.3 -709.1±33.1 MPa) (p=0.0968) of the posts (One-way ANOVA and Tukey's test). Fiber detachment was observed only at the end point of the cut at the margins of the post. CB cut surfaces was smoother than those of the other groups. After 3-point flexural strength test, fiber-matrix separation was evident at the tensile side of the post.3

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Flexural properties of acrylic resin polymers reinforced with unidirectional and woven glass fibers

Cited by 367 publications

References 40 publications

Analysis of flexural strength of a self cured acrylic resin used for fabricating provisional restorations with three different types of reinforcements

Analysis of flexural strength of a self cured acrylic resin used for fabricating provisional restorations with three different types of reinforcements

Bioactive glass-containing cranial implants: an overview

Fiber-matrix integrity, micromorphology and flexural strength of glass fiber posts: Evaluation of the impact of rotary instruments

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