Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/329014
Type: Artigo
Title: Evaluation Of Physical Properties Of A Nanocomposite After Aging, Bleaching And Staining
Author: Gouveia
Thayla H. N.; Publio
Juliana C.; Ambrosano
Glaucia M. B.; Paulillo
Luis A. M. S.; Aguiar
Flavio H. B.; Lima
Debora A. N. L.
Abstract: The objective of the in vitro study was to assess the effect accelerated artificial aging, bleaching agents and coffee staining on the color, gloss, roughness and microhardness of a nanocomposite. Materials and methods: 120 (7 x 2 mm) were prepared and randomly divided into 2 groups (n = 60) depending on the aging. Each group was further subdivided into 6 subgroups (n = 10) according to the bleaching and staining as follows: 10% carbamide peroxide (10% CP), 10% CP + staining, 35% hydrogen peroxide (35% HP), 35% HP + staining, without bleaching treatment (WB) and WB + staining. Scanning electron microscopy was performed for qualitative analysis of the resin surface. Data were submitted to 3- way analysis of variance (ANOVA) and Tukey's test for multiple comparisons. As for Delta E, multiple comparisons were performed by using Tukey's and Dunnett's tests (alpha = 0.05). Results: The bleaching reduced significantly the microhardness of the nanocomposite in without aging groups. All physical properties were found to be negatively changed after the aging process, with bleaching treatment with 10% CP increasing significantly the roughness and loss of gloss compared to the 35% HP. Staining reduced microhardness of both with and without aging nanocomposite as well as the color of the former (E>25), a significantly different result compared to controls. Conclusions: The bleaching reduced the microhardness of the nanocomposite, whereas the aging process changed all the properties studied. The bleaching favored extrinsic staining of the with aging nanocomposite.
Subject: Accelerated Artificial Aging
Composite Resin
Dental Bleaching
Pigmentation
Editor: Wichtig Publishing
Milan
Rights: fechado
Identifier DOI: 10.5301/jabfm.5000294
Address: http://www.jab-fm.com/article/f23da96c-7543-4f9a-ba5a-692030e3d58c
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.