| Influence of potentially remineralizing agents on bleached enamel microhardness. | |
| | |
MedLine Citation:
|
PMID: 19830975 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
This study investigated the effect of the addition of calcium and fluoride into a 35% hydrogen peroxide gel on enamel surface and subsurface microhardness. Twenty extracted human third molars were sectioned to obtain enamel fragments and they were divided into four groups (n = 20) according to the bleaching treatment. Group 1 received no bleaching procedure (control). Group 2 was treated with a 35% hydrogen peroxide gel (Total Bleach), Groups 3 and 4 were bleached with Total Bleach modified by the addition of sodium fluoride and calcium chloride, respectively. The microhardness of the enamel surface was assessed using a Vickers microdurometer immediately after the bleaching treatment. The specimens were sectioned in the central portion, polished and evaluated to determine the microhardness of the enamel subsurface to a depth of 125 microm, with an interval of 25 microm between measures. There were significant differences among the groups. In terms of surface microhardness, the bleached group exhibited the lowest means, and the calcium-modified bleached group exhibited the highest means. Regarding subsurface microhardness, there were no significant differences among the groups for the depth and interaction factors. The bleached group exhibited the lowest means, and the calcium-modified bleached group presented the highest means. It was concluded that the bleaching treatment with 35% hydrogen peroxide significantly reduced the surface and subsurface microhardness of the enamel, and the addition of fluoride and calcium in the bleaching agent increased the microhardness means of the bleached enamel. |
| | |
Authors:
|
Alessandra Bühler Borges; Leticia Yumi Samezima; Léila Pereira Fonseca; Karen Cristina Kazue Yui; Alexandre Luiz Souto Borges; Carlos Rocha Gomes Torres |
Related Documents
:
|
3516455 - Repair of alveolar cleft defects with autogenous bone grafting: periodontal evaluation. 14742655 - Periodontitis and systemic inflammation: control of the local infection is associated w... 9120145 - Vital tooth bleaching: sensitivity and pulpal considerations. 9579625 - The effect of a 1-stage full-mouth disinfection on oral malodor and microbial colonizat... 10963475 - Is epilepsy surgery possible in countries with limited resources? 23467635 - Safety and effectiveness of dexmedetomidine in the pediatric intensive care unit (sad-p... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Operative dentistry Volume: 34 ISSN: 0361-7734 ISO Abbreviation: Oper Dent Publication Date: 2009 Sep-Oct |
Date Detail:
|
Created Date: 2009-10-16 Completed Date: 2009-12-07 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7605679 Medline TA: Oper Dent Country: United States |
Other Details:
|
Languages: eng Pagination: 593-7 Citation Subset: D |
Affiliation:
|
São Paulo State University, Restorative Dentistry, São Paulo, Brazil. alessandra@fosjc.unesp.br |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Calcium Chloride
/
pharmacology Cariostatic Agents / pharmacology Dental Enamel / drug effects* Drug Combinations Hardness / drug effects* Humans Hydrogen Peroxide / adverse effects Molar, Third Sodium Fluoride / pharmacology Tooth Bleaching / adverse effects* Tooth Demineralization / chemically induced Tooth Remineralization* |
| Chemical | |
Reg. No./Substance:
|
0/Cariostatic Agents; 0/Drug Combinations; 10043-52-4/Calcium Chloride; 7681-49-4/Sodium Fluoride; 7722-84-1/Hydrogen Peroxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Influence of cervical finish line type on the marginal adaptation of zirconia ceramic crowns.
Next Document: Student versus faculty performance using a new visual criteria for the detection of caries on occlus...