Microhardness of esthetic restorative materials at different depths
The aim of this study was to analyze the microhardness of two resin-modified glass ionomer cements (Vitremer; Fuji II LC); two polyacid-modified composite resins (Freedom; F2000) and a hybrid composite resin (Prodigy), at different depths from the upper surface. Six hemi-cylinders (3 mm height; 3 mm...
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2003-01-01
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Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000100015 |
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doaj-295c53aa65134937b68022f3f695fc962020-11-24T20:54:01ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392003-01-01618590Microhardness of esthetic restorative materials at different depthsPalma-Dibb Regina GuenkaPalma Alessandra EliasMatson EdmirChinelatti Michelle AlexandraRamos Renata PereiraThe aim of this study was to analyze the microhardness of two resin-modified glass ionomer cements (Vitremer; Fuji II LC); two polyacid-modified composite resins (Freedom; F2000) and a hybrid composite resin (Prodigy), at different depths from the upper surface. Six hemi-cylinders (3 mm height; 3 mm radius) per tested material were obtained. Vickers Hardness was determined using a micro-indentation tester. For each hemi-cylinder, three indentations were taken at one of the following depths: 0.4, 1.0, 2.0 and 2.6 mm. For each material, microhardness average was calculated. Statistical analysis was performed using two-way ANOVA and Tukey test Fuji II LC and Vitremer showed no statistically significant difference among hardness means recorded at the four analyzed depths. The hybrid and the polyacid-modified composite resins showed significant decrease microhardness with increasing depth. It may be concluded that for the RMGIC, microhardness was not affected at depths up to 2.6 mm. On the other hand, both hybrid and PMCRs should de better placed in increments not thicker than 2 mm to achieve optimal hardness throughout the restoration.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000100015composite resinglass ionomer cementcompomermicrohardness |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Palma-Dibb Regina Guenka Palma Alessandra Elias Matson Edmir Chinelatti Michelle Alexandra Ramos Renata Pereira |
spellingShingle |
Palma-Dibb Regina Guenka Palma Alessandra Elias Matson Edmir Chinelatti Michelle Alexandra Ramos Renata Pereira Microhardness of esthetic restorative materials at different depths Materials Research composite resin glass ionomer cement compomer microhardness |
author_facet |
Palma-Dibb Regina Guenka Palma Alessandra Elias Matson Edmir Chinelatti Michelle Alexandra Ramos Renata Pereira |
author_sort |
Palma-Dibb Regina Guenka |
title |
Microhardness of esthetic restorative materials at different depths |
title_short |
Microhardness of esthetic restorative materials at different depths |
title_full |
Microhardness of esthetic restorative materials at different depths |
title_fullStr |
Microhardness of esthetic restorative materials at different depths |
title_full_unstemmed |
Microhardness of esthetic restorative materials at different depths |
title_sort |
microhardness of esthetic restorative materials at different depths |
publisher |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
series |
Materials Research |
issn |
1516-1439 |
publishDate |
2003-01-01 |
description |
The aim of this study was to analyze the microhardness of two resin-modified glass ionomer cements (Vitremer; Fuji II LC); two polyacid-modified composite resins (Freedom; F2000) and a hybrid composite resin (Prodigy), at different depths from the upper surface. Six hemi-cylinders (3 mm height; 3 mm radius) per tested material were obtained. Vickers Hardness was determined using a micro-indentation tester. For each hemi-cylinder, three indentations were taken at one of the following depths: 0.4, 1.0, 2.0 and 2.6 mm. For each material, microhardness average was calculated. Statistical analysis was performed using two-way ANOVA and Tukey test Fuji II LC and Vitremer showed no statistically significant difference among hardness means recorded at the four analyzed depths. The hybrid and the polyacid-modified composite resins showed significant decrease microhardness with increasing depth. It may be concluded that for the RMGIC, microhardness was not affected at depths up to 2.6 mm. On the other hand, both hybrid and PMCRs should de better placed in increments not thicker than 2 mm to achieve optimal hardness throughout the restoration. |
topic |
composite resin glass ionomer cement compomer microhardness |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000100015 |
work_keys_str_mv |
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