Evaluation of the Flexural Strength of Carbon Fiber-, Quartz Fiber-, and Glass Fiber-Based Posts

Galhano, Graziela Ávila Prãdo; Valandro, Luiz Felipe; Melo, Renata Marques de; Scotti, Roberto; Bottino, Marco Antônio

doi:10.1097/01.don.0000137652.49748.0c

Cited by 97 publications

(101 citation statements)

References 10 publications

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“…The most common engineering composites are composed of strong fibers retained by a matrix 17,18) . Some important factors influencing the mechanical properties of the fiber posts include intrinsic properties, such as the elastic and flexural moduli, surface treatment of the fibers and their impregnation in resin, bonding between the fibers and the matrix, the fiber density 9) , diameter, orientation, position1 [8][9][10][11][12][13][14][15][16][17][18][19] , and water absorption by the matrix 9,18) . One of the most important chemical factors influencing the resistance of the post is related to the process of bonding between the fibers and the resin matrix.…”

Section: Discussionmentioning

confidence: 99%

“…One of the most important chemical factors influencing the resistance of the post is related to the process of bonding between the fibers and the resin matrix. The mechanical characteristics and performance of composite resins increased after improving the bond between the inorganic filler and the organic matrix 14) . This bond improvement is created by applying a layer of silane to the inorganic material (fibers) in order to provide a better chemical bond to the organic matrix [12][13][14] .…”

Section: Discussionmentioning

confidence: 99%

“…The mechanical characteristics and performance of composite resins increased after improving the bond between the inorganic filler and the organic matrix 14) . This bond improvement is created by applying a layer of silane to the inorganic material (fibers) in order to provide a better chemical bond to the organic matrix [12][13][14] . Given this evidence, the type of resin matrix and the manufacturing process used to promote chemical bonding between fibers and resin may be one of the most important factors in the resistance of fiber posts 14) .…”

Section: Discussionmentioning

confidence: 99%

“…The cylindrical fiber posts were tested in the Universal Testing Machine (EMIC DL 2000) according to ISO 10477:1992 9,11,14,15) (Fig. 1b).…”

Section: Three-point Flexural Strength Testmentioning

confidence: 99%

“…This adhesion might be influenced by a process of controlled pre-industrial silanization of glass fibers that provides better chemical bonding of the fibers (inorganic material) to the organic matrix 12,13) . The mechanical characteristics and performance of resin composite materials greatly increase when the bond between the inorganic filler and the organic matrix has been optimized 14) . As a consequence, the resistance of fiber posts can be affected, which may have significant clinical consequences, including the fracture of fiber posts, catastrophic failure of the restoration or loss of retention of the root post.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The cylindrical fiber posts were tested in the Universal Testing Machine (EMIC DL 2000) according to ISO 10477:1992 9,11,14,15) (Fig. 1b).…”

Section: Three-point Flexural Strength Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Stevenson¹

2016

Avoiding and Treating Dental Complications

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Post silanization improves bond strength of translucent posts to flowable composite resins

et al. 2007

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The aim of the study is to evaluate the effect of post silanization on the microtensile bond strength (MTBS) of translucent fiber posts to seven flowable composite resins used as core material. Seventy fiber posts were employed. In half of the posts, silanization was performed with Monobond-S. A cylindrical plastic matrix was placed around the post and filled with different resins: UniFil Flow Experimental, UniFil Low Flow Plus Experimental, Venus Flow, Revolution Formula 2, Point 4 Flowable, X-Flow, and Wave mv. Five posts were bonded per group. After polymerization, two longitudinal cuts were made on two opposite sides of the post at its outermost periphery. Then, each specimen was serially sectioned, obtaining 30-35 beams with 1-mm(2) cross-sectional area. Each beam was tested in tension in an Instron machine at 0.5 mm/min. ANOVA and Student Newman Keuls tests were performed. The different resin composite materials and the post silanization procedure had a significant effect on MTBS. The application of a silane coupling agent increased MTBS of flowable composite resins to translucent posts. X-flow and Point 4 attained the highest MTBS regardless of the silane treatment.

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Evaluation of the Flexural Strength of Carbon Fiber-, Quartz Fiber-, and Glass Fiber-Based Posts

Abstract: This study investigated the flexural strength of eight fiber posts (one carbon fiber, one carbon/quartz fiber, one opaque quartz fiber, two translucent quartz fiber, and three glass fiber posts).

Cited by 97 publications

References 10 publications

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

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

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Post silanization improves bond strength of translucent posts to flowable composite resins

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