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Dental enamel bleached for a prolonged and excessive time: Morphological changes

PloS one, 2019-04, Vol.14 (4), p.e0214948-e0214948 [Peer Reviewed Journal]

COPYRIGHT 2019 Public Library of Science ;COPYRIGHT 2019 Public Library of Science ;2019 Vilhena et al 2019 Vilhena et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0214948 ;PMID: 30951549

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Title:
Dental enamel bleached for a prolonged and excessive time: Morphological changes
Author: Vilhena, Kelly Fernanda Barbosa ; Nogueira, Bárbara Catarina Lima ; Fagundes, Nathalia Carolina Fernandes ; Loretto, Sandro Cordeiro ; Angelica, Rômulo Simões ; Lima, Rafael Rodrigues ; Silva E Souza, Júnior, Mário Honorato
Docoslis, Aristides
Subjects: Animals ; Biology and Life Sciences ; Bleaching ; Carbamide Peroxide ; Carbamide Peroxide - pharmacology ; Cattle ; Crystal structure ; Dental enamel ; Dental Enamel - metabolism ; Dental Enamel - ultrastructure ; Electron microscopy ; Enamel, Dental ; Engineering and Technology ; Hardness - drug effects ; Medicine and Health Sciences ; Microscopy ; Microscopy, Electron, Scanning ; Peroxides ; Personal computers ; Physical Sciences ; Physiological aspects ; Research and Analysis Methods ; Spectroscopy ; Structure ; Surface Properties - drug effects ; Teeth ; Tooth Bleaching ; Urea ; Water ; X-ray spectroscopy
Is Part Of: PloS one, 2019-04, Vol.14 (4), p.e0214948-e0214948
Description: This work aimed to evaluate the roughness, microhardness, ultrastructure, chemical composition and crystalline structure in submitted teeth to a prolonged home bleaching regimen with 10% carbamide peroxide (10% PC) for different periods. The specimens were divided into the following groups: G1: negative control (application of water-soluble gel); G2: tooth whitening group (positive control), under application time recommended by the manufacturer (4h/14 days); G3: prolonged whitening 50%, under prolonged time recommended by the manufacturer in 50% (4h/21 days); G4: excessive whitening 100%, under exceeded manufacturer recommended time by 100% (4h/ 28 days). The results were evaluated descriptively and analytically. There were no changes in the roughness in any of the evaluated groups. However, the microhardness decreased in the G4 group. Scanning electron microscopy showed changes in the enamel surface of groups G2, G3 and G4. Dispersive X-ray spectroscopy identified changes in the concentration of chemical elements O, Mg, P, K in all groups. Thus, this study showed that prolonged home bleaching could cause changes in the ultrastructure, chemical composition and microhardness of the enamel.
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0214948
PMID: 30951549
Source: Geneva Foundation Free Medical Journals
MEDLINE
PubMed Central
Public Library of Science
ProQuest Central
DOAJ Directory of Open Access Journals

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Dental enamel bleached for a prolonged and excessive time: Morphological changes

COPYRIGHT 2019 Public Library of Science ;COPYRIGHT 2019 Public Library of Science ;2019 Vilhena et al 2019 Vilhena et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0214948 ;PMID: 30951549

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