Insights on the chemical ageing of acrylic reline resins
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10451/26134 |
Resumo: | Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016 |
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Insights on the chemical ageing of acrylic reline resinsMateriais dentáriosResinas acrílicasClorexidinaTeses de mestrado - 2016Domínio/Área Científica::Ciências Médicas::Medicina ClínicaTese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016The main purpose of this study was to evaluate the effect of chemical ageing on the chlorhexidine release and color stability of three acrylic reline resins – Kooliner, Probase Cold and Ufi Gel Hard, loaded with chlorhexidine. For each material, control group and chlorhexidine 1% and 2.5% (w/w) experimental groups (n=5) were produced. They were placed in artificial saliva and submitted to three different protocols of chemical ageing: a) at pH 7; b) cycles of 6h at pH 5 interchanching with 18h at pH 7; c) cycles of 6h at pH 3 interchanching with 18h at pH 7. A total of 135 specimens were evaluated in this study. The saliva samples were analyzed by UV spectroscopy and chlorhexidine content was determined. Color measurements were performed before and after the release study, using a spectrophotometer. The values registred were converted to CieLab system, and the overall color change (ΔE) was calculated and converted to NBS (National Bureau of Standards) units, to denote the color differences in a clinical perspective. Data were submitted to Kruskall-Wallis tests (p<0.05), followed by multiple comparisons by Mann-Whitney test with Bonferroni correction. When subjected to acid conditions, all acrylic reline resins had a higher drug release. At pH 5 and 7, the pattern of release of Kooliner and Ufi Gel Hard was similar and Probase Cold revealed the lowest amounts of chlorhexidine released. Results of color stability demonstrated that all samples showed a color alteration. There were no differences between the three release media, but it was affected by different acrylic reline resins composition. Kooliner showed the highest color change, followed by Probase Cold and Ufi Gel Hard. Chlorhexidine incorporation leaded to a higher color change.Neves, Maria Cristina Bettencourt, 1976-Bettencourt, Ana FranciscaRepositório da Universidade de LisboaAlexandre, Fábia Aurélia Vieira2017-01-23T16:14:05Z201620162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/26134TID:201289474enginfo: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:RCAAP2023-11-08T16:16:00Zoai:repositorio.ul.pt:10451/26134Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:42:51.242933Repositório 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 |
Insights on the chemical ageing of acrylic reline resins |
title |
Insights on the chemical ageing of acrylic reline resins |
spellingShingle |
Insights on the chemical ageing of acrylic reline resins Alexandre, Fábia Aurélia Vieira Materiais dentários Resinas acrílicas Clorexidina Teses de mestrado - 2016 Domínio/Área Científica::Ciências Médicas::Medicina Clínica |
title_short |
Insights on the chemical ageing of acrylic reline resins |
title_full |
Insights on the chemical ageing of acrylic reline resins |
title_fullStr |
Insights on the chemical ageing of acrylic reline resins |
title_full_unstemmed |
Insights on the chemical ageing of acrylic reline resins |
title_sort |
Insights on the chemical ageing of acrylic reline resins |
author |
Alexandre, Fábia Aurélia Vieira |
author_facet |
Alexandre, Fábia Aurélia Vieira |
author_role |
author |
dc.contributor.none.fl_str_mv |
Neves, Maria Cristina Bettencourt, 1976- Bettencourt, Ana Francisca Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Alexandre, Fábia Aurélia Vieira |
dc.subject.por.fl_str_mv |
Materiais dentários Resinas acrílicas Clorexidina Teses de mestrado - 2016 Domínio/Área Científica::Ciências Médicas::Medicina Clínica |
topic |
Materiais dentários Resinas acrílicas Clorexidina Teses de mestrado - 2016 Domínio/Área Científica::Ciências Médicas::Medicina Clínica |
description |
Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2016 |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2016 2016-01-01T00:00:00Z 2017-01-23T16:14:05Z |
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/10451/26134 TID:201289474 |
url |
http://hdl.handle.net/10451/26134 |
identifier_str_mv |
TID:201289474 |
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.format.none.fl_str_mv |
application/pdf |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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