Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol

Detalhes bibliográficos
Autor(a) principal: Santos,Gustavo Oliveira dos
Data de Publicação: 2007
Outros Autores: Silva,Antônio Henrique Monteiro da Fonseca Thomé da, Guimarães,José Guilherme Antunes, Barcellos,Alexandre de Araújo Lima, Sampaio,Eduardo Martins, Silva,Eduardo Moreira da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000400006
Resumo: OBJECTIVE: The aim of this study was to evaluate the effect of C-factor and light-curing protocol on gap formation in composite resin restorations. Material and METHODS: Cylindrical cavities with 5.0 mm diameter and three different depths (A=1.0, B=2.0 and C=3.0 mm) were prepared on the occlusal surface of 30 human molars and restored in a single increment with P 60. The composite resin was light-cured according to two protocols: standard - 850 mW/cm² / 20 s and gradual - 100 up to 1000 mW/cm² / 10 s + 1000 mW/cm² / 10 s. After storage in distilled water (37°C/7 days), the restorations were cut into three slices in a buccolingual direction and the gap widths were analyzed using a 3D-scanning system. The data were submitted to ANOVA and Student-Newman-Keuls test (alpha=0.05). RESULTS: ANOVA detected a significant influence for the C-factor and light-curing protocol as independent factors, and for the double interaction C-factor vs. light-curing protocol. Cavities with higher C-factor presented the highest gap formation. The gradual light-curing protocol led to smaller gap formation at cavity interfaces. CONCLUSIONS: The findings of this study suggest that the C-factor played an essential role in gap formation. The gradual light-curing protocol may allow relaxation of composite resin restoration during polymerization reaction.
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spelling Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocolComposite resinsC-FactorLight-curing protocolGap formationPolymerization shrinkageOBJECTIVE: The aim of this study was to evaluate the effect of C-factor and light-curing protocol on gap formation in composite resin restorations. Material and METHODS: Cylindrical cavities with 5.0 mm diameter and three different depths (A=1.0, B=2.0 and C=3.0 mm) were prepared on the occlusal surface of 30 human molars and restored in a single increment with P 60. The composite resin was light-cured according to two protocols: standard - 850 mW/cm² / 20 s and gradual - 100 up to 1000 mW/cm² / 10 s + 1000 mW/cm² / 10 s. After storage in distilled water (37°C/7 days), the restorations were cut into three slices in a buccolingual direction and the gap widths were analyzed using a 3D-scanning system. The data were submitted to ANOVA and Student-Newman-Keuls test (alpha=0.05). RESULTS: ANOVA detected a significant influence for the C-factor and light-curing protocol as independent factors, and for the double interaction C-factor vs. light-curing protocol. Cavities with higher C-factor presented the highest gap formation. The gradual light-curing protocol led to smaller gap formation at cavity interfaces. CONCLUSIONS: The findings of this study suggest that the C-factor played an essential role in gap formation. The gradual light-curing protocol may allow relaxation of composite resin restoration during polymerization reaction.Faculdade De Odontologia De Bauru - USP2007-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000400006Journal of Applied Oral Science v.15 n.4 2007reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S1678-77572007000400006info:eu-repo/semantics/openAccessSantos,Gustavo Oliveira dosSilva,Antônio Henrique Monteiro da Fonseca Thomé daGuimarães,José Guilherme AntunesBarcellos,Alexandre de Araújo LimaSampaio,Eduardo MartinsSilva,Eduardo Moreira daeng2007-11-06T00:00:00Zoai:scielo:S1678-77572007000400006Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2007-11-06T00:00Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
title Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
spellingShingle Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
Santos,Gustavo Oliveira dos
Composite resins
C-Factor
Light-curing protocol
Gap formation
Polymerization shrinkage
title_short Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
title_full Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
title_fullStr Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
title_full_unstemmed Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
title_sort Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
author Santos,Gustavo Oliveira dos
author_facet Santos,Gustavo Oliveira dos
Silva,Antônio Henrique Monteiro da Fonseca Thomé da
Guimarães,José Guilherme Antunes
Barcellos,Alexandre de Araújo Lima
Sampaio,Eduardo Martins
Silva,Eduardo Moreira da
author_role author
author2 Silva,Antônio Henrique Monteiro da Fonseca Thomé da
Guimarães,José Guilherme Antunes
Barcellos,Alexandre de Araújo Lima
Sampaio,Eduardo Martins
Silva,Eduardo Moreira da
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Santos,Gustavo Oliveira dos
Silva,Antônio Henrique Monteiro da Fonseca Thomé da
Guimarães,José Guilherme Antunes
Barcellos,Alexandre de Araújo Lima
Sampaio,Eduardo Martins
Silva,Eduardo Moreira da
dc.subject.por.fl_str_mv Composite resins
C-Factor
Light-curing protocol
Gap formation
Polymerization shrinkage
topic Composite resins
C-Factor
Light-curing protocol
Gap formation
Polymerization shrinkage
description OBJECTIVE: The aim of this study was to evaluate the effect of C-factor and light-curing protocol on gap formation in composite resin restorations. Material and METHODS: Cylindrical cavities with 5.0 mm diameter and three different depths (A=1.0, B=2.0 and C=3.0 mm) were prepared on the occlusal surface of 30 human molars and restored in a single increment with P 60. The composite resin was light-cured according to two protocols: standard - 850 mW/cm² / 20 s and gradual - 100 up to 1000 mW/cm² / 10 s + 1000 mW/cm² / 10 s. After storage in distilled water (37°C/7 days), the restorations were cut into three slices in a buccolingual direction and the gap widths were analyzed using a 3D-scanning system. The data were submitted to ANOVA and Student-Newman-Keuls test (alpha=0.05). RESULTS: ANOVA detected a significant influence for the C-factor and light-curing protocol as independent factors, and for the double interaction C-factor vs. light-curing protocol. Cavities with higher C-factor presented the highest gap formation. The gradual light-curing protocol led to smaller gap formation at cavity interfaces. CONCLUSIONS: The findings of this study suggest that the C-factor played an essential role in gap formation. The gradual light-curing protocol may allow relaxation of composite resin restoration during polymerization reaction.
publishDate 2007
dc.date.none.fl_str_mv 2007-08-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000400006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572007000400006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1678-77572007000400006
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Faculdade De Odontologia De Bauru - USP
publisher.none.fl_str_mv Faculdade De Odontologia De Bauru - USP
dc.source.none.fl_str_mv Journal of Applied Oral Science v.15 n.4 2007
reponame:Journal of applied oral science (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Journal of applied oral science (Online)
collection Journal of applied oral science (Online)
repository.name.fl_str_mv Journal of applied oral science (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ||jaos@usp.br
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