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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleAbrasive wear of resin composites as related to finishing and polishing procedurespt_BR
dc.contributor.authorTurssi, CPpt_BR
dc.contributor.authorFerracane, JLpt_BR
dc.contributor.authorSerra, MCpt_BR
unicamp.authorOregon Hlth & Sci Univ, Sch Dent, Div Biomat & Biomech, Portland, OR 97239 USA State Univ Campinas, Sch Dent Piracicaba, Dept Restorat Dent, Piracicaba, SP, Brazil Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Restorat Dent, Ribeirao Preto, SP, Brazilpt_BR
dc.subjectfinishing and polishingpt_BR
dc.subjectsurface roughnesspt_BR
dc.subject.wosPosterior Compositept_BR
dc.description.abstractObjectives. Finishing and polishing procedures may cause topographical changes and introduce subsurface microcracks in dental composite restoratives. Since both of these effects may contribute toward the kinetics of wear, the purpose of this study was to assess and correlate the wear and surface roughness of minifilled and nanofilled composites finished and polished by different methods. Methods. Specimens (n = 10) made of a minifilled and a nanofilled composite were finished and polished with one of the four sequences: (1) tungsten carbide burs plus Al2O3-impregnated brush (CbBr) or (2) tungsten carbide burs plus diamond-impregnated cup (CbCp), (3) diamond burs plus brush (DmBr) or (4) diamond burs plus cup (DmCp). As a control, abrasive papers were used. After surface roughness had been quantified, three-body abrasion was simulated using the OHSU wear machine. The wear facets were then scanned to measure wear depth and post-testing roughness. All sets of data were subjected to ANOVA and Tukey's tests (alpha = 0.05). Pearson's correlation test was applied to check for the existence of a relationship between pre-testing roughness and wear. Results. Significantly smoother surfaces were attained with the sequences CbBr and CbCp, whereas DmCp yielded the roughest surface. Regardless of the finishing/ polishing technique, the nanofilled composite exhibited the lowest pretesting roughness and wear. There was no correlation between the surface roughness achieved after finishing/ polishing procedures and wear (p=0.3899). Significance. Nano-sized materials may have improved abrasive wear resistance over minifilled composites. The absence of correlation between wear and surface roughness produced by different finishing/ polishing methods suggests that the latter negligibly influences material loss due to three-body abrasion. (C) 2005 Academy Dental Materials. Published by Elsevier Ltd. All rights
dc.relation.ispartofDental Materialspt_BR
dc.relation.ispartofabbreviationDent. Mater.pt_BR
dc.publisherElsevier Sci Ltdpt_BR
dc.identifier.citationDental Materials. Elsevier Sci Ltd, v. 21, n. 7, n. 641, n. 648, 2005.pt_BR
dc.sourceWeb of Sciencept_BR
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