[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
:: Volume 21, Issue 4 (Foll Text in Persian 2010) ::
J Iran Dent Assoc 2010, 21(4): 307-313 Back to browse issues page
Effect of fluoride therapy before or after bleaching on enamel micro-hardness
Parvin Mirzakoucheki-Boroujeni *1, Mohammad reza Malekipoor, Solmaz Homayouni
1- , e.mail:cosmeticmir@yahoo.com
Abstract:   (13703 Views)

 Effect of fluoride therapy before or after bleaching on enamel micro-hardness

 

 

  Dr. Mirzakoucheki-Boroujeni P ., 1 Dr. M alekipoor M ., 1 Dr. H omayouni S . 2

  1 Assistant Professor, Department of Operative Dentistry, School of Dentistry, Islamic Azad University, Khorasgan, Isfahan, Iran. 2 Dentist.

 

  (Received 21 Feb, 2009 Accepted 6 Feb, 2010)

  

  Abstract

  

  Background and Aim : Bleaching teeth can lead to decreased calcium, phosphate and fluoride content of enamel which may cause decreased enamel micro-hardness. Reportedly, the topical use of fluoride can help regaining those minerals. The aim of this study was to evaluate the effect of fluoride therapy on enamel micro-hardness when used before or after bleaching.

  Materials and Methods : Total of 60 premolar teeth were divided into 5 groups. The occlusal surface in all teeth were flattened and covered with nail varnish. Initially, all specimens were inserted in artificial saliva for 7 days. Group 1 used as negative control. Samples in group 2 were bleached 2 times with 30 minutes interval for 5 days, using %45 carbamid peroxide. Group 3 samples were exposed to fluoride varnish for 5 minutes. Group 4 exposed to fluoride varnish for 5 minutes, bleached 2 times for 30 minutes in 5 day intervals. Group 5 samples were treated same as group 4, however, followed by fluoride varnish for 5 minutes. Micro hardness for each group measured in 3 points after cleaning the occlusal section. The LSD and ANOVA tests were used for data analysis.

  Results : This study showed, reduction in enamel surface hardness can be compensated by fluoride application. Group 2 (bleached only) showed the minimum micro hardness (294.38), and group 3 (exposed to fluoride only) showed the maximum micro hardness (455.36).

  Conclusion : Fluoride therapy can affect enamel micro-hardness before and after bleaching. The application of fluoride varnish is recommended after exposing teeth to bleaching agents.

  Key words : Tooth Bleaching – Fluorides - Dental Enamel.

  

  Corresponding Author : Dr. Mirzakoucheki-Boroujeni P ., Assistant Professor, Department of Operative Dentistry, School of Dentistry, Islamic Azad University, Khorasgan, Isfahan, Iran.

  

  e.mail: cosmeticmir@yahoo. com

  

 

Keywords: Tooth Bleaching, Fluorides, Dental Enamel.
Full-Text [PDF 206 kb]   (3922 Downloads)    
Type of Study: Research | Subject: Restorative Dentistry
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:

Mirzakoucheki-Boroujeni P, Malekipoor M R, Homayouni S. Effect of fluoride therapy before or after bleaching on enamel micro-hardness. J Iran Dent Assoc 2010; 21 (4) :307-313
URL: http://jida.ir/article-1-700-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 4 (Foll Text in Persian 2010) 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 0.06 seconds with 30 queries by YEKTAWEB 4538