Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/196663
Type: Artigo de periódico
Title: Textural Characterization Of Finished And Polished Composites Over Time Of Intraoral Exposure.
Author: Turssi, Cecilia Pedroso
Rodrigues, Antonio Luiz
Serra, Mônica Campos
Abstract: This in situ study sought to evaluate the surface roughness evolution of resin composites finished and polished by different methods. A total of 108 rectangular-shaped specimens of a microfilled and a hybrid composite were cured against a Mylar matrix strip and left unpolished or instrumented with diamond burs, Al2O3-coated disks, Al2O3-impregnated UDMA disk, or with diamond burs followed by either one of the disks. After specimens had been profiled for the average surface roughness (Ra, microm), 18 volunteers wore a removable palatal appliance, which accommodated one specimen of each one of the 12 groups investigated. Surface roughness for up to 28 days of intraoral exposure was then measured at 1- or 7-day intervals. A split-plot ANOVA (alpha = 0.05) revealed a significant interaction between group and time. Tukey's test and regression analyses ascertained that initially finishing with burs only provided the roughest surface to both composites. Unpolished surfaces and those specimens polished with Al2O3-coated disks, regardless of previous use of diamond burs, attained smoother surface. The Al2O3-impregnated UDMA disk was capable of smoothening the surface of the hybrid material previously finished with diamond burs. The roughness achieved after finishing and polishing composites may be either smoothened or roughened after intraoral exposure. On the basis of the roughness range, it is advisable to use Al2O3-coated disks, regardless of whether diamond burs were previously used. Al2O3-impregnated UDMA disks (with or without previous application of diamond burs) may be also suitable for instrumenting hybrid restoratives.
Subject: Adolescent
Adult
Aluminum Oxide
Composite Resins
Dental Polishing
Dental Restoration Wear
Female
Humans
Male
Materials Testing
Microscopy, Atomic Force
Random Allocation
Surface Properties
Citation: Journal Of Biomedical Materials Research. Part B, Applied Biomaterials. v. 76, n. 2, p. 381-8, 2006-Feb.
Rights: fechado
Identifier DOI: 10.1002/jbm.b.30384
Address: http://www.ncbi.nlm.nih.gov/pubmed/16206257
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
pmed_16206257.pdf363.69 kBAdobe PDFView/Open


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