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Paper Information

Journal:   IRANIAN ENDODONTIC JOURNAL (IEJ)   2014 , Volume 9 , Number 4; Page(s) 246 To 250.
 
Paper: 

PUSH-OUT BOND STRENGTH OF DORIFILL, EPIPHANY AND MTA-FILLAPEX SEALERS TO ROOT CANAL DENTIN WITH AND WITHOUT SMEAR LAYER

 
 
Author(s):  FOROUGH REYHANI MOHAMMAD, GHASEMI NEGIN*, RAHIMI SAEED, SALEM MILANI AMIN, MOKHTARI HADI, SHAKOUIE SAHAR, SAFARVAND HOSSEIN
 
* DEPARTMENT OF ENDODONTICS, DENTAL SCHOOL, TABRIZ UNIVERSITY OF MEDICAL SCIENCES, TABRIZ, IRAN
 
Abstract: 

Introduction: The aim of the present experimental study was to evaluate the push-out bond strength of Dorifill, Epiphany and MTA-Fillapex sealers to root canal dentin in presence and absence of smear layer (SL). Methods and Materials: Sixty human single-rooted teeth were selected and divided into six groups (n=10). The canal irrigation protocol in groups 1, 3 and 5 consisted of 2.5% NaOCl during instrumentation and normal saline at the end of preparation plus a 5-min irrigation with 17% ethylenediaminetetraacetic acid (EDTA). In the remaining groups, normal saline was used for canal irrigation. The root canals were filled with Epiphany/Resilon (groups 1 and 2), Dorifill/gutta-percha (groups 3 and 4) and MTA Fill apex/ gutta-percha (groups 5 and 6). After two weeks of storage in 95% relative humidity at 37?C, 2 mm-thick dentin disks were prepared from coronal third of each root. The push-out bond strength test was carried out using a universal testing machine. Data were analyzed with the two-way ANOVA and post hoc Tukey’s tests. Statistical significance was defined at 0.05. Results: The highest (3.06±0.38 MPa) and lowest (1.16±0.32 MPa) push-out bond strength values were recorded in Epiphany/Resilon-NaOCl/EDTA and Dorifill/gutta-percha/normal saline groups, respectively. There were significant differences in the bond strength of sealers (P<0.05). In addition, elimination of the SL significantly increased the bond strength of all sealers (P<0.05). Conclusion: The Epiphany/Resilon group exhibited the highest push-out bond strength in the presence and absence of the SL. Elimination of the SL resulted in a significant increase in the bond strength of all the sealers to dentin.

 
Keyword(s): DORIFILL, EPIPHANY SEALER, MTA-FILLAPEX, PUSH-OUT BOND STRENGTH, ROOT CANAL, SMEAR LAYER
 
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