J Adv Prosthodont.  2015 Feb;7(1):15-20. 10.4047/jap.2015.7.1.15.

Evaluation of the resin cement thicknesses and push-out bond strengths of circular and oval fiber posts in oval-shapes canals

• Er O
• Kilic K
• Kilinc HI
• Aslan T
• Sagsen B

• KMID: 1974885
• DOI: http://doi.org/10.4047/jap.2015.7.1.15

Abstract

PURPOSE
The aim of this study was to evaluate whether the push-out bond strength varies between oval and circular fiber posts, and to examine the effect on the resin cement thicknesses around the posts.
MATERIALS AND METHODS
Eighteen mandibular premolar roots were separated into two groups for oval and circular fiber posts systems. Post spaces were prepared and fiber posts were luted to the post spaces. Roots were cut horizontally to produce 1-mm-thick specimens. Resin cement thicknesses were determined with a metallographic optical microscope and push-out tests were done.
RESULTS
No significant differences were observed in terms of push-out bond strength between the oval and circular fiber posts (P>.05) The resin cement thicknesses of the oval posts were greater than those of the circular posts group in the coronal, middle and apical specimens (P<.05).
CONCLUSION
In the light of these results, it can be stated that resin cement thickness does not affect the push-out bond strength.

Keyword

Push-out; Resin cement thickness; Oval fiber post; Circular fiber post

MeSH Terms

Bicuspid
Resin Cements*
Resin Cements

Figure

• 

  Fig. 1 (A) Cervical aspect of circular fiber-post slice (R represents the radius of the circular post). (B) Apical aspect of circular fiber-post slice (r represents the radius of the circular post). (C) Cervical aspect of oval fiber-post slice (A, B, C, D, E, F points were used to determine the distance of AB, OH, HD, radius of ovality [r1]; and, ML, L, DL, D, DB, B, MB, M points were used to measure the resin cement thicknesses). (D) Apical aspect of oval fiber-post slice (A', B', C', D', E', F'points were used to determine the distance of A'B', O'H', H'D', radius of ovality [r2].

Reference

1. Scotti N, Forniglia A, Bergantin E, Paolino DS, Pasqualini D, Berutti E. Fibre post adaptation and bond strength in oval canals. Int Endod J. 2014; 47:366–372.

2. Ho YC, Lai YL, Chou IC, Yang SF, Lee SY. Effects of light attenuation by fibre posts on polymerization of a dual-cured resin cement and microleakage of post-restored teeth. J Dent. 2011; 39:309–315.

3. Kremeier K, Fasen L, Klaiber B, Hofmann N. Influence of endodontic post type (glass fiber, quartz fiber or gold) and luting material on push-out bond strength to dentin in vitro. Dent Mater. 2008; 24:660–666.

4. Grandini S, Goracci C, Monticelli F, Borracchini A, Ferrari M. SEM evaluation of the cement layer thickness after luting two different posts. J Adhes Dent. 2005; 7:235–240.

5. D'Arcangelo C, Cinelli M, De Angelis F, D'Amario M. The effect of resin cement film thickness on the pullout strength of a fiber-reinforced post system. J Prosthet Dent. 2007; 98:193–198.

6. Egilmez F, Ergun G, Cekic-Nagas I, Vallittu PK, Lassila LV. Influence of cement thickness on the bond strength of tooth-colored posts to root dentin after thermal cycling. Acta Odontol Scand. 2013; 71:175–182.

7. Coniglio I, Magni E, Cantoro A, Goracci C, Ferrari M. Push-out bond strength of circular and oval-shaped fiber posts. Clin Oral Investig. 2011; 15:667–672.

8. Coniglio I, Garcia-Godoy F, Magni E, Carvalho CA, Ferrari M. Resin cement thickness in oval-shaped canals: oval vs. circular fiber posts in combination with different tips/drills for post space preparation. Am J Dent. 2009; 22:290–294.

9. Wu MK, R'oris A, Barkis D, Wesselink PR. Prevalence and extent of long oval canals in the apical third. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2000; 89:739–743.

10. Costa JA, Rached-Júnior FA, Souza-Gabriel AE, Silva-Sousa YT, Sousa-Neto MD. Push-out strength of methacrylate resin-based sealers to root canal walls. Int Endod J. 2010; 43:698–706.

11. Cheleux N. The Ellipson concept: an ultrasonic canal preparation combined with an oval fibre post. Int Dent SA. 2008; 3:52–58.

12. Rtd.fr/ellipson.php [Internet]. Saint Egreve: Association of RTD Online Resources Inc.;2004. Available from: www.rtd.fr/ellipson.php.

13. Bitter K, Kielbassa AM. Post-endodontic restorations with adhesively luted fiber-reinforced composite post systems: a review. Am J Dent. 2007; 20:353–360.

14. Ferrari M, Vichi A, Grandini S. Efficacy of different adhesive techniques on bonding to root canal walls: an SEM investigation. Dent Mater. 2001; 17:422–429.

15. Goracci C, Tavares AU, Fabianelli A, Monticelli F, Raffaelli O, Cardoso PC, Tay F, Ferrari M. The adhesion between fiber posts and root canal walls: comparison between microtensile and push-out bond strength measurements. Eur J Oral Sci. 2004; 112:353–361.

16. Schmitter M, Rammelsberg P, Gabbert O, Ohlmann B. Influence of clinical baseline findings on the survival of 2 post systems: a randomized clinical trial. Int J Prosthodont. 2007; 20:173–178.

17. Chen WP, Chen YY, Huang SH, Lin CP. Limitations of push-out test in bond strength measurement. J Endod. 2013; 39:283–287.

18. Mannocci F, Qualtrough AJ, Worthington HV, Watson TF, Pitt Ford TR. Randomized clinical comparison of endodontically treated teeth restored with amalgam or with fiber posts and resin composite: five-year results. Oper Dent. 2005; 30:9–15.

19. Erdemir U, Mumcu E, Topcu FT, Yildiz E, Yamanel K, Akyol M. Micro push-out bond strengths of 2 fiber post types luted using different adhesive strategies. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010; 110:534–544.

20. Muñoz C, Llena C, Forner L. Oval fiber posts do not improve adaptation to oval-shaped canal walls. J Endod. 2011; 37:1386–1389.

21. Rengo C, Spagnuolo G, Ametrano G, Juloski J, Rengo S, Ferrari M. Micro-computerized tomographic analysis of premolars restored with oval and circular posts. Clin Oral Investig. 2014; 18:571–578.

22. Kalkan M, Usumez A, Ozturk AN, Belli S, Eskitascioglu G. Bond strength between root dentin and three glass-fiber post systems. J Prosthet Dent. 2006; 96:41–46.

23. Hagge MS, Wong RD, Lindemuth JS. Effect of dowel space preparation and composite cement thickness on retention of a prefabricated dowel. J Prosthodont. 2002; 11:19–24.

24. Perez BE, Barbosa SH, Melo RM, Zamboni SC, Ozcan M, Valandro LF, Bottino MA. Does the thickness of the resin cement affect the bond strength of a fiber post to the root dentin. Int J Prosthodont. 2006; 19:606–609.