Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study

Detalhes bibliográficos
Autor(a) principal: Pires, Tatiana Rafaela Lopes
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/36720
Resumo: Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.
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spelling Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro studyWhite mineral trioxide aggregateColour stabilityDiscolourationBismuth oxideTrabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.Objective: The purpose of this study was to investigate and compare chromatic alterations of an inorganic silicate-based cement, also known as white mineral trioxide aggregate (WMTA), submitted to different environmental conditions using the CIE L*a*b* system evaluated by two different methods. Methods: Twenty-four samples of WMTA (ProRoot® MTA, Dentsply Tulsa Dental, Johnson City, TN) were randomly distributed in four groups (n=4). In group 1 the samples did not undergo any additional treatment (negative control group). In group 2 WMTA samples were light irradiated for 60 seconds using a LED poliwave curing unit. In group 3 and 4 WMTA samples were coated with a layer of glycerine and adhesive, respectively and light irradiated for 60 seconds. A commercial spectrophotometer (VITA Easyshade® Advance 4.0, VidentTM, California, USA) and calibrated photographic digital analysis were used to determine colour coordinates from the CIE L*a*b* system of each sample after three different time points: 30 minutes, 48 hours and 7 days. In order to understand the chemical alterations associated to colour variations of the material x-ray diffraction analysis was also conducted. Data was analysed using statistical software IBM® SPSS® Statistics, version 20. Results: Consistency between the two colour measuring methods was not observed. Significant colour variation was observed for group 3. X-ray diffraction analysis showed no differences between compounds. Conclusion: WMTA showed significant dark discolouration after irradiation with an LED poliwave curing unit in an oxygen-free environment promoted by glycerine although after 48 hours discolouration had faded. The same light irradiation protocol associated to an oxygen-free conditions achieved by an adhesive resin layer did not induce significant discolouration at the end of the experiment protocol.2014-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10316/36720http://hdl.handle.net/10316/36720TID:201632284engPires, Tatiana Rafaela Lopesinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-03-04T11:49:01Zoai:estudogeral.uc.pt:10316/36720Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:45:35.466876Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
title Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
spellingShingle Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
Pires, Tatiana Rafaela Lopes
White mineral trioxide aggregate
Colour stability
Discolouration
Bismuth oxide
title_short Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
title_full Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
title_fullStr Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
title_full_unstemmed Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
title_sort Comparative analysis of chromatic alterations of a Calcium Silicate-based Material: in vitro study
author Pires, Tatiana Rafaela Lopes
author_facet Pires, Tatiana Rafaela Lopes
author_role author
dc.contributor.author.fl_str_mv Pires, Tatiana Rafaela Lopes
dc.subject.por.fl_str_mv White mineral trioxide aggregate
Colour stability
Discolouration
Bismuth oxide
topic White mineral trioxide aggregate
Colour stability
Discolouration
Bismuth oxide
description Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.
publishDate 2014
dc.date.none.fl_str_mv 2014-07
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/36720
http://hdl.handle.net/10316/36720
TID:201632284
url http://hdl.handle.net/10316/36720
identifier_str_mv TID:201632284
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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