[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
Main Menu
Journal Information::
Editorial Policies::
Articles archive::
For Authors::
Contact us::
Site Facilities::
::
Search in website

Advanced Search
Receive site information
Enter your Email in the following box to receive the site news and information.
Last site contents
:: Contact Us
:: Volume 21, Issue 2 (Foll Text in Persian 2009) ::
J Iran Dent Assoc 2009, 21(2): 115-121 Back to browse issues page
Effect of sodium ascorbate and calcium hydroxide on shear bond strength of composite resin to bleached enamel
Atiye Feiz , Maryam Khoroushi , Maryam Gheisarifar * 1
1- , e.mail:mgh_20002@yahoo.com
Abstract:   (14905 Views)

 Effect of sodium ascorbate and calcium hydroxide on shear bond strength of composite resin to bleached enamel

 

 

  Dr. Feiz A ., 1 Dr. Khoroushi M ., 2 Dr. Gheisarifar M . 3

  1 Assistant Professor, Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran. 2 Associate Professor, Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran. 3 Dentist.

  

  (Received 2 Dec, 2008 Accepted 6 May, 2009)

  

  Abstract

  Background and Aim : Application of sodium ascorbate as an antioxidant and calcium hydroxide as a buffering agent has been recommended after bleaching .The aim of this study was to investigate the effect of these two materials on shear bond strength of composite resin attached to bleached enamel.

  Materials and Methods : This in-vitro investigation used 60 human sound premolars. They were randomly divided into five groups (n=12). Buccal enamel surfaces were flattened by using a trimmer machine and silicon carbide paper. The samples in negative control (NC) group were not bleached, while all others were bleached with 35% hydrogen peroxide gel for 5 days. Composite cylinders were bonded in positive control (PC) group immediately after bleaching in delayed bonding (DB) group after one week in sodium ascorbate (SA) and calcium hydroxide (CH) groups after 40 hours of treatment with these two materials, respectively. The specimens were thermocycled (5-55C, 500 cycles) 24 hours after bonding and they were subjected to shear bond testing by using universal machine. Statistical analyses were carried out to identify group differences and Kruskal–Wallis and Mann–Whitney tests were used to detect the significance level.

  Results : Group differences revealed that, the lowst mean of bond strength belonged to the calcium hydroxide group the difference of which was significant compared with the other groups (P<0.006). The positive control group had lower bond strength in comparison with the negative control, sodium ascorbate and delay bonding groups (p<0/001) .But the difference among other groups was not significant.

  Conclusions : Both one week delay and using sodium ascorbate treatment could significantly increase the bond strength of composite resin to bleached enamel, while the use of calcium hydroxide had an adverse effect on composite resin bond strength.

  Key words : Bleaching - Bond strength - Antioxidant - Calcium hydroxide - Composite resin.

  

  Corresponding Author : Dr. Gheisarifar M . Dentist.

  e.mail: mgh_20002@yahoo.com

  

 

Keywords: Bleaching - Bond strength - Antioxidant - Calcium hydroxide - Composite resin.
Full-Text [PDF 284 kb]   (2066 Downloads)    
Type of Study: Research |
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Feiz A, Khoroushi M, Gheisarifar M. Effect of sodium ascorbate and calcium hydroxide on shear bond strength of composite resin to bleached enamel. J Iran Dent Assoc 2009; 21 (2) :115-121
URL: http://jida.ir/article-1-598-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 21, Issue 2 (Foll Text in Persian 2009) Back to browse issues page
Journal of Iranian Dental Association

AWT IMAGE

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly

Persian site map - English site map - Created in 0.05 seconds with 36 queries by YEKTAWEB 4645