Document Detail

pH-changes during intracoronal bleaching: an in vivo study.
MedLine Citation:
PMID:  22186753     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: This study aimed to measure pH changes during 14 days intracoronal bleaching with hydrogen peroxide/sodium perborate and carbamide peroxide/sodium perborate.
MATERIALS AND METHODS: Twenty patients presenting endodontically treated central maxillary incisors with color alterations were divided in two groups (n = 10): Group CP + SP: 37% carbamide peroxide + sodium perborate paste; Group HP + SP: 30% hydrogen peroxide + sodium perborate paste. The pH values were measured using a digital microprocessor at different times: Baseline, 2, 7 and 14 days. Data were analyzed with two-way ANOVA followed by Tukey's test (α = 0.05).
RESULTS: ANOVA showed p < 0.00 which indicated significant difference between the groups. The mean values (± sd) and the results of the Tukey´s test were: HP + SP/14 days-7.98 (±0.58)a; HP + SP/7 days-8.59 (±0.18)b; HP + SP/2 days- 8.83 (±0.32)bc; HP + SP/Baseline-8.83 (±0.01)bc; CP + SP/ Baseline-8.89 (±0.01)bc; CP + SP/14 days-9.11 (±0.58)cd; CP + SP/7 days-9.54 (±0.16)de; CP + SP/2 days-9.66 (±0.08) de. The group HP + SP resulted in significantly lower pH values compared with group CP + SP.
CONCLUSION: It can be concluded that both associations showed alkaline pH values; however, there was significant reduction in the pH values of the 30% hydrogen peroxide associated with sodium perborate after 14 days.
CLINICAL SIGNIFICANCE: The association of hydrogen peroxide and carbamide peroxide with sodium perborate paste presented alkaline characteristics during the 14-day evaluated period. Thus, regarding pH changes, both associations can be considered safe as intracoronal bleaching agents.
Daphne Camara Barcellos; Alessandra Buhler Borges; Regina Celia dos Santos Pinto Silva; Luciana Maria Ribeiro; Cesar Rogerio Pucci; Carlos Rocha Gomes Torres
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article     Date:  2011-03-01
Journal Detail:
Title:  The journal of contemporary dental practice     Volume:  12     ISSN:  1526-3711     ISO Abbreviation:  J Contemp Dent Pract     Publication Date:    2011 Mar-Apr
Date Detail:
Created Date:  2011-12-21     Completed Date:  2012-05-24     Revised Date:  2014-07-30    
Medline Journal Info:
Nlm Unique ID:  101090552     Medline TA:  J Contemp Dent Pract     Country:  United States    
Other Details:
Languages:  eng     Pagination:  109-13     Citation Subset:  D; IM    
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MeSH Terms
Analysis of Variance
Borates / chemistry
Drug Combinations
Hydrogen Peroxide / chemistry
Hydrogen-Ion Concentration
Middle Aged
Peroxides / chemistry
Statistics, Nonparametric
Tooth Bleaching / methods*
Tooth Bleaching Agents / chemistry*
Tooth, Nonvital*
Urea / analogs & derivatives,  chemistry
Young Adult
Reg. No./Substance:
0/Borates; 0/Drug Combinations; 0/Peroxides; 0/Tooth Bleaching Agents; 31PZ2VAU81/carbamide peroxide; 8W8T17847W/Urea; BBX060AN9V/Hydrogen Peroxide; Y52BK1W96C/sodium perborate

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

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