Influence of endodontic sealers on the bond strength of carbon fiber posts.

Abstract

OBJECTIVE:

The aim of this study was to verify the influence of endodontic sealers on the bond strength of an adhesive system and a resin cement used for carbon posts cementation.

METHODS:

Thirty extracted human premolars were instrumented and randomly divided into three groups according to the tested sealer: EndoFill, Sealapex, or EndoREZ. Specimens were stored at 37 degrees C. After 48 h, half of specimens were prepared to receive the post and the others after 7 days. The posts were cemented with Adper Single Bond/Rely X ARC and stored in distilled water at 37 degrees C for 7 days. After this period, the specimens were sectioned in three slices (coronal, middle, and apical). The push-out test was performed in a universal machine and the debonded area was examined in a stereomicroscope.

RESULTS:

Data were submitted ANOVA and Tukey test (alpha = 0.05). The EndoFill showed lower bond strength than other sealers (p < 0.01). The EndoREZ sealer was statistically greater than other groups for coronal and middle portions and similar for apical portion (p > 0.05). Coronal and middle portions showed the best results for all groups, mainly when the canal preparation was performed after 48 h (p < 0.01). Mixed failure occurs with more frequency (55.6%) followed by failure in adhesive-dentin interface (34.4%) and adhesive-post interface (10.0%).

CONCLUSION:

The use of EndoREZ sealer promoted higher bond strength in root coronal and middle portions when carbon post was fixed with a resin cement.

• Authors: C S Teixeira, B Pasternak-Junior, A H Borges, S M Paulino, M D Sousa-Neto
• Journal: Journal of biomedical materials research. Part B, Applied biomaterials (J Biomed Mater Res B Appl Biomater) Vol. 84 Issue 2 Pg. 430-5 (Feb 2008) ISSN: 1552-4981 [Electronic] United States
• PMID: 17595025 (Publication Type: Comparative Study, Journal Article, Validation Study)
• Copyright: (c) 2007 Wiley Periodicals, Inc.

Chemical References

• Carbon Fiber
• Composite Resins
• EndoRez
• Pit and Fissure Sealants
• Resin Cements
• Carbon

Topics

• Carbon
• Carbon Fiber
• Composite Resins
• Dental Bonding
• Dental Prosthesis Retention
• Endodontics
• Humans
• Pit and Fissure Sealants
• Post and Core Technique
• Resin Cements
• Root Canal Therapy