Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements

Detalhes bibliográficos
Autor(a) principal: Fonseca, Rodrigo Borges
Data de Publicação: 2010
Outros Autores: Branco, Carolina Assaf, Quagliatto, Paulo Sérgio, Gonçalves, Luciano de Souza, Soares, Carlos José, Carlo, Hugo Lemes, Correr-Sobrinho, Lourenço
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: https://www.revistas.usp.br/jaos/article/view/3848
Resumo: Clinicians tend to make reductions in glass ionomer power/liquid (P/L) ratios since some materials are difficult to mix and flow into small cavities, grooves or pits. In general, changing the P/L ratio decreases the physical and mechanical properties of conventional glass ionomer cements (GICs) and resin modified glass ionomer cements (RMGICs), but alterations seem to depend on their composition. OBJECTIVE: To determine the influence of P/L ratio on the radiodensity and diametral tensile strength (DTS) of glass ionomer cements. MATERIAL AND METHODS: There were 2 factors under study: P/L ratio (manufacturer's recommended P/L ratio and a 50% reduced P/L ratio), and materials (Vitro Molar, Vitro Fil, Vitro Cem conventional GICs and Vitro Fil LC, Ortho Glass LC RMGICs. Five 1-mm-thick samples of each material-P/L ratio were produced for radiodensity evaluation. Samples were x-ray exposed onto Digora phosphor plate and radiodensity was obtained using the software Digora for Windows 2.5 Rev 0. For DTS, five (4.0x8.0 mm) cylinder samples of each material were tested (0.5 mm/min). Data were subjected to one- and two-way ANOVA (5x2) followed by Tukey's HSD test, or Kruskal-Wallis and Dunn's method. For paired comparisons, t-test or Mann-Whitney test were used (α=0.05). RESULTS: There was a significant interaction (P=0.001) for the studied factors (materials vs. P/L ratio). Reduced P/L ratio resulted in significantly lower DTS for the RMGICs, but radiodensity was affected for all materials (P
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spelling Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements Tensile strengthGlass ionomer cementsRadiographyMicroscopyelectronscanning Clinicians tend to make reductions in glass ionomer power/liquid (P/L) ratios since some materials are difficult to mix and flow into small cavities, grooves or pits. In general, changing the P/L ratio decreases the physical and mechanical properties of conventional glass ionomer cements (GICs) and resin modified glass ionomer cements (RMGICs), but alterations seem to depend on their composition. OBJECTIVE: To determine the influence of P/L ratio on the radiodensity and diametral tensile strength (DTS) of glass ionomer cements. MATERIAL AND METHODS: There were 2 factors under study: P/L ratio (manufacturer's recommended P/L ratio and a 50% reduced P/L ratio), and materials (Vitro Molar, Vitro Fil, Vitro Cem conventional GICs and Vitro Fil LC, Ortho Glass LC RMGICs. Five 1-mm-thick samples of each material-P/L ratio were produced for radiodensity evaluation. Samples were x-ray exposed onto Digora phosphor plate and radiodensity was obtained using the software Digora for Windows 2.5 Rev 0. For DTS, five (4.0x8.0 mm) cylinder samples of each material were tested (0.5 mm/min). Data were subjected to one- and two-way ANOVA (5x2) followed by Tukey's HSD test, or Kruskal-Wallis and Dunn's method. For paired comparisons, t-test or Mann-Whitney test were used (α=0.05). RESULTS: There was a significant interaction (P=0.001) for the studied factors (materials vs. P/L ratio). Reduced P/L ratio resulted in significantly lower DTS for the RMGICs, but radiodensity was affected for all materials (PUniversidade de São Paulo. Faculdade de Odontologia de Bauru2010-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/384810.1590/S1678-77572010000600008Journal of Applied Oral Science; Vol. 18 No. 6 (2010); 577-584 Journal of Applied Oral Science; Vol. 18 Núm. 6 (2010); 577-584 Journal of Applied Oral Science; v. 18 n. 6 (2010); 577-584 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3848/4538Copyright (c) 2010 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessFonseca, Rodrigo BorgesBranco, Carolina AssafQuagliatto, Paulo SérgioGonçalves, Luciano de SouzaSoares, Carlos JoséCarlo, Hugo LemesCorrer-Sobrinho, Lourenço2012-04-27T12:11:28Zoai:revistas.usp.br:article/3848Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T12:11:28Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
title Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
spellingShingle Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
Fonseca, Rodrigo Borges
Tensile strength
Glass ionomer cements
Radiography
Microscopy
electron
scanning
title_short Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
title_full Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
title_fullStr Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
title_full_unstemmed Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
title_sort Influence of powder/liquid ratio on the radiodensity and diametral tensile strength of glass ionomer cements
author Fonseca, Rodrigo Borges
author_facet Fonseca, Rodrigo Borges
Branco, Carolina Assaf
Quagliatto, Paulo Sérgio
Gonçalves, Luciano de Souza
Soares, Carlos José
Carlo, Hugo Lemes
Correr-Sobrinho, Lourenço
author_role author
author2 Branco, Carolina Assaf
Quagliatto, Paulo Sérgio
Gonçalves, Luciano de Souza
Soares, Carlos José
Carlo, Hugo Lemes
Correr-Sobrinho, Lourenço
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Fonseca, Rodrigo Borges
Branco, Carolina Assaf
Quagliatto, Paulo Sérgio
Gonçalves, Luciano de Souza
Soares, Carlos José
Carlo, Hugo Lemes
Correr-Sobrinho, Lourenço
dc.subject.por.fl_str_mv Tensile strength
Glass ionomer cements
Radiography
Microscopy
electron
scanning
topic Tensile strength
Glass ionomer cements
Radiography
Microscopy
electron
scanning
description Clinicians tend to make reductions in glass ionomer power/liquid (P/L) ratios since some materials are difficult to mix and flow into small cavities, grooves or pits. In general, changing the P/L ratio decreases the physical and mechanical properties of conventional glass ionomer cements (GICs) and resin modified glass ionomer cements (RMGICs), but alterations seem to depend on their composition. OBJECTIVE: To determine the influence of P/L ratio on the radiodensity and diametral tensile strength (DTS) of glass ionomer cements. MATERIAL AND METHODS: There were 2 factors under study: P/L ratio (manufacturer's recommended P/L ratio and a 50% reduced P/L ratio), and materials (Vitro Molar, Vitro Fil, Vitro Cem conventional GICs and Vitro Fil LC, Ortho Glass LC RMGICs. Five 1-mm-thick samples of each material-P/L ratio were produced for radiodensity evaluation. Samples were x-ray exposed onto Digora phosphor plate and radiodensity was obtained using the software Digora for Windows 2.5 Rev 0. For DTS, five (4.0x8.0 mm) cylinder samples of each material were tested (0.5 mm/min). Data were subjected to one- and two-way ANOVA (5x2) followed by Tukey's HSD test, or Kruskal-Wallis and Dunn's method. For paired comparisons, t-test or Mann-Whitney test were used (α=0.05). RESULTS: There was a significant interaction (P=0.001) for the studied factors (materials vs. P/L ratio). Reduced P/L ratio resulted in significantly lower DTS for the RMGICs, but radiodensity was affected for all materials (P
publishDate 2010
dc.date.none.fl_str_mv 2010-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3848
10.1590/S1678-77572010000600008
url https://www.revistas.usp.br/jaos/article/view/3848
identifier_str_mv 10.1590/S1678-77572010000600008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3848/4538
dc.rights.driver.fl_str_mv Copyright (c) 2010 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2010 Journal of Applied Oral Science
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
dc.source.none.fl_str_mv Journal of Applied Oral Science; Vol. 18 No. 6 (2010); 577-584
Journal of Applied Oral Science; Vol. 18 Núm. 6 (2010); 577-584
Journal of Applied Oral Science; v. 18 n. 6 (2010); 577-584
1678-7765
1678-7757
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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