Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , |
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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Journal of applied oral science (Online) |
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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 |
_version_ |
1748936434739314688 |