Composites roughness and microhardness after different bleaching techniques

Detalhes bibliográficos
Autor(a) principal: Leal, Andreia Filipa Sousa
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/36356
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 Composites roughness and microhardness after different bleaching techniquesTooth bleachingResin compositeRoughnessMicrohardnessTrabalho 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.Aims: The purpose of this study is to evaluate the surface roughness and microhardness of a recent nanohybrid composite, SonicFill™ (Kerr Corporation, Orange, USA), and compare it with another nanofilled, Filtek™ Supreme (3M ESPE, St. Paul, MN, USA) after the submission of both to the action of two bleaching agents: 10% carbamide peroxide and 35% hydrogen peroxide. Methods and materials: Sixty cylindrical specimens (10mmx2mm) of each composite were prepared and stored in artificial saliva at 37⁰C for 24 hours. The specimens were then polished and stored in artificial saliva at 37⁰C. After 24 hours, specimens were divided into 6 groups (n=20). Groups 1, 2: stored in artificial saliva. Groups 3, 4: 10% carbamide peroxide. Groups 5, 6: 35% hydrogen peroxide with LED lamp activation. 24 hours after treatments, specimens went through 500 cycles of thermocycling between 5ºC and 55ºC with a dwell time of 30 seconds. A mechanical roughness tester was employed to measure the surface roughness parameters and the Vickers test to measure microhardness on the top surface of each specimen. One-Way-ANOVA, Tukey and Bonferroni methods with a significance level of 5% were used for the statistical analysis. Results: For SonicFill™, there was no statistically significant difference in microhardness between the control group (1) and the bleached groups (3, 5). However there was difference between home bleaching (group 3) and in-office treatment (group 5). For Filtek Supreme XTE™ there was no significant difference in microhardness among all groups. In case of roughness, there was no significant difference in roughness average (Ra) and root mean square roughness (Rq) among all groups. The mean roughness depth (Rz) parameter showed no statistically significant differences among all groups for SonicFill™ but, in Filtek Supreme XTE™ there was a significant increase between control (group 2) and bleaching treatments (groups 4, 6). Roughness skewness (Rsk) showed no statistically significant differences among all groups for SonicFill™ and Filtek Supreme XTE™, except for groups 2 and 4, where the Rsk increased with CP. Conclusion: The microhardness of Filtek Supreme XTE™ and SonicFill™ is not affected by bleaching treatments. Both bleaching treatments affect Rz of Filtek Supreme XTE™ groups, in contrast to the SonicFill™ groups. The carbamide peroxide 10% treatment affects the Rsk of group Filtek Supreme XTE™ with no significant effect in the SonicFill™ group.2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10316/36356http://hdl.handle.net/10316/36356engLeal, Andreia Filipa Sousainfo: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:RCAAP2022-01-20T17:48:51Zoai:estudogeral.uc.pt:10316/36356Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:45:32.498483Repositório 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 Composites roughness and microhardness after different bleaching techniques
title Composites roughness and microhardness after different bleaching techniques
spellingShingle Composites roughness and microhardness after different bleaching techniques
Leal, Andreia Filipa Sousa
Tooth bleaching
Resin composite
Roughness
Microhardness
title_short Composites roughness and microhardness after different bleaching techniques
title_full Composites roughness and microhardness after different bleaching techniques
title_fullStr Composites roughness and microhardness after different bleaching techniques
title_full_unstemmed Composites roughness and microhardness after different bleaching techniques
title_sort Composites roughness and microhardness after different bleaching techniques
author Leal, Andreia Filipa Sousa
author_facet Leal, Andreia Filipa Sousa
author_role author
dc.contributor.author.fl_str_mv Leal, Andreia Filipa Sousa
dc.subject.por.fl_str_mv Tooth bleaching
Resin composite
Roughness
Microhardness
topic Tooth bleaching
Resin composite
Roughness
Microhardness
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 2013
dc.date.none.fl_str_mv 2013
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/10316/36356
http://hdl.handle.net/10316/36356
url http://hdl.handle.net/10316/36356
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
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