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

✍ Scribed by C.S. Teixeira; B. Pasternak-Junior; A.H. Borges; S.M. Paulino; M.D. Sousa-Neto

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 129 KB
• Volume: 84B
• Category: Article
• ISSN: 1552-4973
• DOI: 10.1002/jbm.b.30888

✦ Synopsis

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°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°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 (α = 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. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 2008