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CC BY-NC-ND 4.0 · European Journal of General Dentistry 2020; 9(01): 17-22
DOI: 10.4103/ejgd.ejgd_50_19
Original Article

The effect of chlorhexidine application on the microtensile bond strength and durability of a total-etch adhesive

Hila Hajizadeh
Department of Restorative and Cosmetic Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
,
Maryam Bojarpour
1   Department of Periodontics, School of Dentistry, Bojnord University of Medical Sciences, Bojnord, Iran
,
Alireza Borouziniat
2   Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
,
Fatemeh Namdar
3   Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Abstract

Aim: The aim of this study was to evaluate the effect of chlorhexidine (CHX) on resin–dentin microtensile bond strength (μTBS) after 6-month aging and to compare with sodium hypochlorite. Materials and Methods: A total of 40 extracted human third molar teeth were mounted in the acrylic resin. Flat occlusal surfaces of dentin were exposed, and after acid etching, the samples were divided randomly into four groups as follows: (a) Control group: Single Bond adhesive resin was applied. (b) The dentin surfaces were exposed to 2% CHX, and then, Single Bond was applied. (c) Dentin surfaces were treated by 5.25% sodium hypochlorite; after rinsing and drying, Single Bond was applied. (d) At first, 5.25% sodium hypochlorite was applied for 30 s, and then, 2% CHX and Single Bond adhesive were applied. Finally, Filtek P60 composite was bonded on the dentin surface. The samples of each group were divided into two subgroups of 24 h and 6 months. μTBS tests were performed using universal testing machine. Afterward, modes of failures were investigated. The statistical analyses were carried out using ANOVA, t-test, and Dunnett’s test. Results: The mean of μTBS for the 24-h and 6-month groups was 15.19 and 10.99 MPa, respectively. Bond strength of all groups except Group D decreased after 6 months, and this bond strength reduction in Group C was more than other groups. Most failure modes were in adhesive type. Conclusions: The use of CHX did not have better preservation of μTBS when compared to control group. Use of hypochlorite is not recommended.

Keywords

Chlorhexidine - matrix metalloproteinase - microtensile bond strength - sodium hypochlorite

Financial support and sponsorship

This study was financially supported by the Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.




Publication History

Article published online:
01 November 2021

© 2020. European Journal of General Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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