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VOLUME 20 , ISSUE 9 ( September, 2019 ) > List of Articles


Influence of Adaptation and Adhesion on the Retention of Computer-aided Design/Computer-aided Manufacturing Glass Fiber Posts to Root Canal

Khaled Azzam

Keywords : Adhesion, Computer-aided design/computer-aided manufacturing fiber post, Friction, Pushout strength, Self-adhesive cement

Citation Information : Azzam K. Influence of Adaptation and Adhesion on the Retention of Computer-aided Design/Computer-aided Manufacturing Glass Fiber Posts to Root Canal. J Contemp Dent Pract 2019; 20 (9):1003-1008.

DOI: 10.5005/jp-journals-10024-2654

License: CC BY-NC 4.0

Published Online: 01-12-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: The study aimed to assess the effect of friction and adhesion on the pushout bond strength of CAD/CAM fiber-reinforced composite (FRC) post and cores in comparison to prefabricated fiber posts. Materials and methods: Thirty extracted single-rooted premolars were divided into three groups (N = 10): CP: CAD/CAM FRC posts (Trilor, Bioloren) cemented with self-adhesive resin cement (Rely X U200, 3M) as control group. CPL: CAD/CAM FRC composite posts cemented with the same self-adhesive resin cement after lubricating the root canal with petroleum jelly (Vaseline, Unilever) to prevent adhesion. RXP: prefabricated posts cemented with self-adhesive resin cement. Specimens were subjected to thermal cycling and then to pushout tests. The mode of failure was observed using a stereomicroscope. Results were analyzed by two-way ANOVA followed by a Tukey's post hoc test for comparison, p = 0.05. Results: Push-out bond strength was significantly lower in the RXP group (8.54 ± 3.35 MPa) in comparison to CP (12.10 ± 1.38 MPa), while no significant differences were concluded between the other groups. Failure was mostly adhesive for CPL and RXP and adhesive and mixed for CP. Conclusion: Custom made CAD/CAM posts have a positive effect on the retention of FRC posts to root canal walls while adhesion between self-adhesive cement and root dentin did not influence significantly the pushout bond strength of CAD/CAM posts to root canal. Clinical significance: The friction of well-adapted CAD/CAM fiber post and cores plays a predominant role in the success of post restorations of endodontically treated teeth.

  1. Bru E, Forner L, et al. Fibre post behaviour prediction factors. a review of the literature. J Clin Exp Dent 2013 Jul;5(3):e150–e153. DOI: 10.4317/jced.50619.
  2. Kensche A, Dähne F, et al. Shear bond strength of different types of adhesive systems to dentin and enamel of deciduous teeth in vitro. Clin Oral Investig 2016 May;20(4):831–840. DOI: 10.1007/s00784-015-1560-y.
  3. Goracci C, Ferrari M. Current perspectives on post systems: a literature review. Aust Dent J 2011 June;56(1):77–83. DOI: 10.1111/j.1834-7819.2010.01298.x.
  4. Mancebo JC, Jiménez-Castellanos E, et al. Effect of tooth type and ferrule on the survival of pulpless teeth restored with fiber posts: a 3-year clinical study. Am J Dent 2010 Dec;23(6):351–356.
  5. Marchionatti AME, Wandscher VF, et al. Clinical performance and failure modes of pulpless teeth restored with posts: a systematic review. Braz Oral Res 2017 July;31:e64. DOI: 10.1590/1807-3107bor-2017.vol31.0064.
  6. Naumann M, Koelpin M, et al. 10-year survival evaluation for glass-fiber-supported postendodontic restoration: a prospective observational clinical study. J Endod Apr 2012;38(4):432–435. DOI: 10.1016/j.joen.2012.01.003.
  7. Bakaus TE, Gruber YL, et al. Bond strength values of fiberglass post to flared root canals reinforced with different materials. Braz Oral Res 2018 Mar;32:e13. DOI: 10.1590/1807-3107bor-2018.vol32.0013.
  8. Tsintsadze N, Juloski J, et al. Performance of CAD/CAM fabricated fiber posts in oval-shaped root canals: An in vitro study. Am J Dent 2017 Oct;30(5):248–254.
  9. Farina AP, Chiela H, et al. Influence of Cement Type and Relining Procedure on Push-Out Bond Strength of Fiber Posts after Cyclic Loading. J Prosthodont 2016 Jan;25(1):54–60. DOI: 10.1111/jopr. 12271.
  10. Davidson CL, de Gee AJ, et al. The competition between the composite-dentin bond strength and the polymerization contraction stress. J Dent Res 1984 Dec;63(12):1396–1399. DOI: 10.1177/00220345840630121101.
  11. Llena C, García-Gallart M, et al. Root canal adaptation and intra-tubular penetration of three fiber-post cementation systems. J Clin Exp Dent 2018 Dec;10(12):1198–1204. DOI: 10.4317/jced.55208.
  12. Ubaldini ALM, Benetti AR, et al. Challenges in luting fibre posts: adhesion to the post and to the dentine. Dent Mater 2018 Jul;34(7):1054–1062. DOI: 10.1016/
  13. Sarkis-Onofre R, Skupien JA. The role of resin cement on bond strength of glass-fiber posts luted into root canals: a systematic review and meta-analysis of in vitro studies. Oper Dent 2014 Jan-Feb;39(1):E31–E44. DOI: 10.2341/13-070-LIT.
  14. Falcão Spina DR, Goulart da Costa R, et al. CAD/CAM post-and-core using different esthetic materials: Fracture resistance and bond strengths. Am J Dent 2017 Dec;30(6):299–304.
  15. Da Silva NR, Aguiar GC, et al. Effect of Resin Cement Porosity on Retention of Glass-Fiber Posts to Root Dentin: An Experimental and Finite Element Analysis. Braz Dent J 2015 Nov–Dec;26(6):630–636. DOI: 10.1590/0103-6440201300589.
  16. Chieffi N, Chersoni S, et al. The effect of application sustained seating pressure on adhesive luting procedure. Dent Mater 2007 Feb;23(2):159–164. DOI: 10.1016/
  17. Faria-e-Silva AL, Pedrosa-Filho Cde F, et al. Effect of relining on fiber post retention to root canal. J Appl Oral Sci 2009 Nov–Dec;17(6): 600–604. DOI: 10.1590/S1678-77572009000600012.
  18. Teixeira CS, Silva-Sousa YC, et al. Effects of light exposure time on composite resin hardness after root reinforcement using translucent fibre post. J Dent 2008 Jul;36(7):520–528. DOI: 10.1016/j.jdent.2008.03.015.
  19. Gomes GM, Gomes OM, et al. Evaluation of different restorative techniques for filling flared root canals: fracture resistance and bond strength after mechanical fatigue. J Adhes Dent 2014 Jun;16(3): 267–276. DOI: 10.3290/j.jad.a31940.
  20. Goracci C, Fabianelli A, et al. The contribution of friction to the dislocation resistance of bonded fiber posts. J Endod 2005 Aug;3(8):608–612. DOI: 10.1097/01.don.0000153841.23594.91.
  21. Aksornmuang J, Nakajima M, et al. Effects of C-factor and resin volume on the bonding to root canal with and without fibre post insertion. J Dent 2011 Jun;39(6):422–429. DOI: 10.1016/j.jdent.2011.03.007.
  22. Boschian Pest L, Cavalli G, et al. Adhesive post-endodontic restorations with fiber posts: push-out tests and SEM observations. Dent Mater 2002 Dec;18(8):596–602. DOI: 10.1016/S0109-5641(02) 00003-9.
  23. Soares CJ, Santana FR, et al. Finite element analysis and bond strength of a glass post to intraradicular dentin: comparison between microtensile and push-out tests. Dent Mater 2008 Oct;24(10): 1405–1411. DOI: 10.1016/
  24. Castellan CS, Santos-Filho PC, et al. Measuring bond strength between fiber post and root dentin: a comparison of different tests. J Adhes Dent 2010 Dec;12(6):477–485. DOI: 10.3290/j.jad.a17856.
  25. Zicari F, De Munck J, et al. Factors affecting the cement-post interface. Dent Mater 2012 Mar;28(3):287–297. DOI: 10.1016/ 11.003.
  26. D'Arcangelo C, Cinelli M, et al. The effect of resin cement film thickness on the pullout strength of a fiber-reinforced post system. J Prosthet Dent 2007 Sep;98(3):193–198. DOI: 10.1016/S0022-3913(07) 60055-9.
  27. Arrais CA, Chagas CL, et al. Effect of simulated tooth temperature on the degree of conversion of self-adhesive resin cements exposed to different curing conditions. Oper Dent 2014 Mar-Apr;39(2):204–212. DOI: 10.2341/13-091-L.
  28. Radovic I, Mazzitelli C, et al. Evaluation of the adhesion of fiber posts cemented using different adhesive approaches. Eur J Oral Sci 2008;116(6):557–563. DOI: 10.1111/j.1600-0722.2008.00577.x.
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