Evaluation of surface treatments on the bond strength between two fiber-glass posts and a composite resin

Andreza Barbosa Santos Guimarães, Rana de Brito Granja, Emily Vivianne Freitas da Silva, Roberta Novis, Blanca Liliana Torres Léon


Introduction: The aim of this study was to evaluate the influence of different surface treatment methods on glass-fiber posts relative to their bond strength with the composite resin and to evaluate the types of failures that occurred. Materials and Methods: Thirty-six posts from WhitepostDC (FG group) and Exacto Conics (AG group) were used, divided into: Control FG-1 and AG-1 groups – application of silane, according to manufacturers’ specifications; FG-2 and AG-2 groups – conditioning with 10% hydrogen peroxide and silanization; FG-3 and AG-3 groups – aluminum oxide blasting for 10 seconds and silaniza-tion. The composite resin was added in 2-mm increments, each increment was photopolymerized for 40 seconds, until the entire length of the matrix was filled. Then, the assembly (fiber post and composite resin) was sectioned into three portions (cervical, middle and apical) (n = 18). Samples were submitted to the bond strength analysis by a push-out test in a Universal Testing Machine and the failure types were evaluated with a 30 × magnification with an optical micro-scope. Data were submitted to the analysis of variance, the Tukey test, and the chi-square test with a 5% significance level. Results: For AG groups, the treatment with silane (23.10 MPa) resulted in statistically greater bond strength than the treatments with peroxide (17.19 MPa) and blasting (16.28 MPa). It was found that the bond strength was statistically higher in the middle third (21.16 MPa) than in the apical third (12.55 MPa) for the peroxide treatment. The mixed-type failure had the highest prevalence (57.01%). Conclusion: Silane treatment showed statistically greater bond strength values, when the Angelus brand was tested.


Dental pins; Composite resins; Surface properties


Monticelli F, Grandini S, Goracci C, Ferrari M. Clinical behavior of translucent fiber posts: a 2-year prospective study. IntJ Prosthodont. 2003;16(6):593-6.

Goracci C, Raffaelli O, Monticelli F, Balleri B, Bertelli E, Ferrari M. The adhe-sion between prefabricated FRC posts and composite resin cores: microtensile bond strength with and without post-silanization. Dent Mater. 2005;21(5):437-44.

Marchionatti AME, Wandscher VF, Rippe MP, Kaizer OB, Valandro LF. Clinical performance and failure modes of pulpless teeth restored with posts: a systematic review. Braz Oral Res. 2017;31:e64.

Figueiredo FED, Martins-Filho PRS, Silva ALF. Do metal post-retained resto-rations result in more root fractures than fiber post-retained restorations? A systematic review and meta-analysis. J Endod. 2015;41(3):309-16.

Novais VR, Simamotos Júnior PC, Rontani RMP, Correr-Sobrinho L, Soares CJ. Bond strength between fiber posts and composite resin core: influence of temperature on silane coupling agents. Braz Dent J. 2012;23(1):8-14.

Alshahrani A, Albaqami M, Naji Z, Al-Khunein Y, Alsubaie K, Alqahtani A, et al. Impact of different surface treatment methods on bond strength between fiber post and composite core material. Saudi Dent J. Forthcoming 2020.

Yenise M, Kulunk S. Effects of chemical surface treatments of quartz and glass fıber posts on the retention of a composite resin. J Prosthet Dent. 2008;99(1):38-45.

Chen Q, Wei X, Mi YI, Bai Y, Cai Q, Wang XZ. Effect on the bond strengths of glass fiber posts functionalized with polydopamine after etching with hydro-gen peroxide. Dent Mater J. 2015;34(6):740-5.

Braga NMA, Souza-Gabriel AE, Messias DCF, Rached-Junior FJA, Oliveira CF, Silva RB. Flexural properties, morphology and bond strength of fiber-reinforced posts: influence of post pretreatment. Braz Dent J. 2012;23(6):679-85.

Khoroushi M, Mazaher H, Tarighi P, Samimi P, Khalighinejad N. Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement. Restor Dent Endod. 2014;39(4):303-9.

Perdigão J, Gomes G, Lee IK. The effect of silane on the bond strengths of fiber posts. Dent Mater. 2006;22(8):752-8.

Archiana CH, Raju SMK, Yadhav SS, Konagala RK, Manthena SRK, Teja PR. Effect of surface pretreatment and thermal activation of silane coupling agent on bond strength of fiber posts to resin cement. J Contemp Dent Pract. 2019;20(11): 1293-6.

Ferrari M, Vichi A, Grandini S. Efficacy of different adhesive techniques on bonding to root canal walls: An SEM investigation. Dent Mater. 2001;17(5):422-9.

Faria MI, Gomes É, João DCM, Filho MS, Filho CBS, Paulino SM. Tensile strength of glass fiber posts submitted to different surface treatments. Braz Dent J. 2013;24(6):626-9.

Soares CJ, Soares PV, de Freitas Santos-Filho PC, Castro CG, Magalhaes D, Versluis A. The influence of cavity design and glass fiber posts on biome-chanical behavior of endodontically treated premolars. J Endod. 2008;34(8):1015-9.

Radovic I, Monticelli F, Goracci C, Cury ÀH, Coniglio I, Vulicevic ZR, et al. The effect of sandblasting on adhesion of a dual-cured resin composite to methacrylic fiber posts: microtensile bond strength and SEM evaluation. J Dent. 2007;35(6):496-502.

Braga NMA, Souza-Gabriel AE, Messias DCF, Rached-Junior FJA, Oliveira CF, Silva RG, et al. Flexural properties, morphology and bond strength of fiber-reinforced posts: influence of post pretreatment. Braz Dent J. 2012;23(6):679-85.

Elsaka SE. Influence of chemical surface treatments on adhesion of fiber posts to composite resin core materials. Dent Mater. 2013;29(5):550-8.

DOI: https://doi.org/10.22456/2177-0018.108848

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e-ISSN 2177-0018 / ISSN 0566-1854.

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