Effect of nanoscale particles incorporation on microhardness of polymers for oral prosthesis

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dc.creatorMarcelo Coelho Goiato
dc.creatorBruna Carolina Rossatti Zuccolotti
dc.creatorAmália Moreno
dc.creatorAljomar José Vechiato Filho
dc.creatorMarcela Borghi Paulini
dc.creatorDaniela Micheline dos Santos
dc.date.accessioned2023-06-30T11:50:37Z
dc.date.accessioned2025-09-08T23:40:02Z
dc.date.available2023-06-30T11:50:37Z
dc.date.issued2016
dc.identifier.doihttps://doi.org/10.4103%2F0976-237X.188543
dc.identifier.issn0976237X
dc.identifier.urihttps://hdl.handle.net/1843/55585
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofContemporary Clinical Dentistry
dc.rightsAcesso Aberto
dc.subjectAcrylic resins
dc.subjectGeriatrics
dc.subjectDenture bases
dc.subjectHardness
dc.subjectSpectrometry, x-ray emission
dc.titleEffect of nanoscale particles incorporation on microhardness of polymers for oral prosthesis
dc.typeArtigo de periódico
local.citation.epage311
local.citation.spage307
local.citation.volume7
local.description.resumoObjectives: This study aimed to evaluate the influence of the incorporation of pigments on surface hardness of four acrylic resins subjected to thermocycling and analyze their elemental composition using energy dispersive X-ray spectroscopy (EDS). Materials and Methods: Twenty-one discs of each resin were fabricated, whereas seven had no additive, seven had 3% of nanoscale pigments and last seven had 10% of them. The percentage was obtained by measuring the total weight of each resin disc. Besides, seven discs composed by only nanoscale pigments were also fabricated, totalizing 91 discs. The pigment was weighed by using an analytical balance (BEL Analytical Equipment, SP, Brazil). The surface hardness was measured through a hardness tester machine before and after thermocycling (5–55°C, for 2000 cycles). Data were analyzed by ANOVA and Tukey's test (P < 0.05). The chemical composition of the discs composed only by nanoscale pigments was analyzed with EDS test. Results: Hardness of all resins decreased after thermocycling. The lowest values were observed on the discs with 3% of nanoscale pigments and discs fabricated only with them. EDS showed the presence of titanium dioxide. Conclusion: Discs with 7% of pigments (after thermocycling) showed higher hardness values.
local.publisher.countryBrasil
local.publisher.departmentFAO - DEPARTAMENTO DE CLÍNICA
local.publisher.initialsUFMG
local.url.externahttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5004541/

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