| Effects of phosphoric acid on bovine enamel bleached with carbamide peroxide. | |
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MedLine Citation:
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PMID: 18186734 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to measure the demineralization capacity of 37% phosphoric acid on bovine enamel at different time-points after bleaching with 30% carbamide peroxide. Five, 4 x 4-mm sections were obtained from the enamel of 10 bovine incisors. After applying 30% carbamide peroxide (Vivastyle) for 90 min, specimens were stored in artificial saliva for 0, 24, 72 h, or 7 d and then immersed in 37% phosphoric solution. At 15, 30, 60, 90, and 120 s, 5-ml aliquots were extracted. A control group of specimens was not bleached. Ca(2+) concentrations were measured by atomic absorption spectrophotometry. A larger amount of Ca(2+) was extracted from enamel by phosphoric acid after the application of 30% carbamide peroxide. Twenty-four hours after bleaching, significantly more Ca(2+) was extracted from bleached than from control specimens at all time-points, and this greater susceptibility to the action of the acid persisted for at least 1 wk after bleaching. |
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Authors:
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Carmen L S G de Medeiros; Santiago González-López; Maria V Bolaños-Carmona; Purificación Sanchez-Sanchez; Jorge Bolaños-Carmona |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: European journal of oral sciences Volume: 116 ISSN: 1600-0722 ISO Abbreviation: Eur. J. Oral Sci. Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2008-01-11 Completed Date: 2008-03-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9504563 Medline TA: Eur J Oral Sci Country: Denmark |
Other Details:
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Languages: eng Pagination: 66-71 Citation Subset: D; IM |
Affiliation:
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Department of Restorative Dentistry, University of Paraiba, Campina Grande, Brasil. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acid Etching, Dental
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adverse effects Animals Calcium / analysis Cattle Dental Enamel / drug effects* Dental Materials / adverse effects* Drug Combinations Oxidants / adverse effects* Peroxides / adverse effects* Phosphoric Acids / adverse effects* Time Factors Tooth Bleaching / adverse effects* Tooth Demineralization / chemically induced Urea / adverse effects, analogs & derivatives* |
| Chemical | |
Reg. No./Substance:
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0/Dental Materials; 0/Drug Combinations; 0/Oxidants; 0/Peroxides; 0/Phosphoric Acids; 124-43-6/carbamide peroxide; 57-13-6/Urea; 7440-70-2/Calcium; 7664-38-2/phosphoric acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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