Document Detail

Influence of remineralizing gels on bleached enamel microhardness in different time intervals.
MedLine Citation:
PMID:  20420061     Owner:  NLM     Status:  MEDLINE    
This study evaluated the influence of bleaching gel pH, the effect of applying remineralizing gels after bleaching and the effect of artificial saliva on enamel microhardness. Seventy bovine incisors were divided into three groups: Group 1 (n=10) received no bleaching procedure (control); Group 2 was bleached with a 35% hydrogen peroxide neutral gel (n=30) and Group 3 was bleached with a 35% hydrogen peroxide acid gel (n=30). Each experimental group was subdivided into three groups (n=10) according to the post-bleaching treatment: storage in artificial saliva, application of a fluoride gel and application of a combination of calcium and fluoride gel. The specimens were stored in artificial saliva for 7, 15 and 30 days and enamel microhardness was evaluated. The Vickers microhardness data were analyzed by three-way RM ANOVA, which revealed a significant difference only for treatment factor. The Tukey's test showed that the groups bleached followed by no additional treatment exhibited microhardness means significantly lower than the bleached groups treated with remineralizing gels. The Dunnet's test showed a significant difference only for the group bleached with acid gel without remineralizing treatment compared to the control group measured immediately after bleaching. It was concluded that acid bleaching gel significantly reduced enamel microhardness and that use of remineralizing gels after bleaching can significantly enhance the microhardness of bleached enamel.
Alessandra Bühler Borges; Karen Cristina Kazue Yui; Thaís Corrêa D'Avila; Camila Lurie Takahashi; Carlos Rocha Gomes Torres; Alexandre Luis Souto Borges
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Operative dentistry     Volume:  35     ISSN:  0361-7734     ISO Abbreviation:  Oper Dent     Publication Date:    2010 Mar-Apr
Date Detail:
Created Date:  2010-04-27     Completed Date:  2010-05-11     Revised Date:  2013-04-05    
Medline Journal Info:
Nlm Unique ID:  7605679     Medline TA:  Oper Dent     Country:  United States    
Other Details:
Languages:  eng     Pagination:  180-6     Citation Subset:  D    
Department of Restorative Dentistry at São José dos Campos School of Dentistry-UNESP--São Paulo State University, São José dos Campos, SP, Brazil.
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MeSH Terms
Calcium Phosphates / pharmacology
Dental Enamel / drug effects*
Gels / pharmacology
Hardness / drug effects
Hydrogen Peroxide / adverse effects
Oxidants / adverse effects
Sodium Fluoride / pharmacology
Time Factors
Tooth Bleaching / adverse effects*
Tooth Remineralization / methods*
Reg. No./Substance:
0/Calcium Phosphates; 0/Gels; 0/Oxidants; 7681-49-4/Sodium Fluoride; 7722-84-1/Hydrogen Peroxide; 97Z1WI3NDX/calcium phosphate

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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