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Submitted: 02 Jun 2014
Revision: 10 Jun 2014
Accepted: 15 Jun 2014
ePublished: 25 Jun 2014
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Avicenna J Dent Res. 2014;6(1): 21-24.
doi: 10.17795/ajdr-21195
  Abstract View: 553
  PDF Download: 277

Research Article

The Effect of Chlorhexidine on Push-out Bond Strength of Mineral Trioxide Aggregate

Alireza Adl 1, Nooshin Sadat Shojaee 1*, Fereshte Sobhnamayan 1, Neda Sadat Shojaee 2

1 Department of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran
2 School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran
Corresponding author: Nooshin Sadat Shojaee, Department of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran. Tel: +98-7116263193, Fax: +987116270325 shojaeen@sums.ac.ir

Abstract

Background: Trioxide Aggregate (MTA) has been widely used in root canal therapy. MTA has been mixed with chlorhexidine to increase its antimicrobial effect.

Objectives: The aim of this study was to evaluate the effect of chlorhexidine (2%) on push-out bond strength of Mineral Trioxide Aggregate (MTA).

Materials and Methods: Sixty dentin disks with a thickness of 1.5 ± 0.2 mm and lumen size of 1.3 mm were prepared. Dentin disks were randomly divided into four groups (n = 15), and their lumens were filled with MTA mixed with distilled water (groups 1 and 3) or with chlorhexidine 2% (groups 2 and 4). Specimens were incubated at 37°C for 3 days (groups 1 and 2) or 21 days (groups 3 and 4). Bond strengths of the MTA-treated dentin surfaces were evaluated using a universal testing machine, and bond failure on the disks was examined by light microscope. Data was analyzed using Kruskal-Wallis H test (P = 0.976).

Results: There were no statistically significant differences between all the experimental groups. The mode of bond failure was predominantly mixed for distilled water groups and cohesive for CHX groups.

Conclusions: This study suggested that chlorhexidine had no negative effect on the bond strengths of MTA-treated dentin. 

Keywords: Mineral Trioxide Aggregate, Chlorhexidine, Push-Out Bond Strength
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Abstract View: 553

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