Determination of enamel and coronal dentin microhardness
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian journal of oral sciences (Online) |
Texto Completo: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641702 |
Resumo: | The Vickers microhardness of enamel and coronal dentin of 30 canines was evaluated. The incisal portion of the crown was discarded by means of a transverse section made 5mm, coronally, from the cemento-enamel junction located on the buccal surface obtaining, thus, the coronal specimen, on which measurements on 3 regions of each dental tissue was carried out. The mean value of microhardness at the E1 region (0.05 to 0.1 mm from the external surface) was of 395.92 VHN and at the E2 region (0.3 to 0.5 mm from the external surface) was of 339.41 VHN, E1 and E2 being, statistically different. The mean microhardness at the E3 region (0.05 to 0.1 mm from the dentinoenamel junction), for the free surfaces, was of 255.02 VHN, and for the proximal surfaces, was of 269.72 VHN. Following statistical analysis (Variance Analysis Test, p < 0.05), we concluded that enamel microhardness decreased from the external surface towards the dentinoenamel junction. The mean microhardness of coronal dentin was obtained in 3 regions: the DC1 region (0.05 to 0.1 mm from the dentinoenamel junction) - with a mean of 38.68 VHN; the DC2 region (0.3 to 0.5 mm from the dentinoenamel junction) - with a mean of 56.42 VHN; and the DC3 region (0.8 to 1.0 mm from the dentinoenamel junction) - with a mean of 36.49 VHN. Microhardness at DC2 was statistically greater than that of DC1, which, in turn was greater than that at DC3. |
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Brazilian journal of oral sciences (Online) |
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Determination of enamel and coronal dentin microhardnessMicrohardness. Enamel. Coronal dentinOdontologiaThe Vickers microhardness of enamel and coronal dentin of 30 canines was evaluated. The incisal portion of the crown was discarded by means of a transverse section made 5mm, coronally, from the cemento-enamel junction located on the buccal surface obtaining, thus, the coronal specimen, on which measurements on 3 regions of each dental tissue was carried out. The mean value of microhardness at the E1 region (0.05 to 0.1 mm from the external surface) was of 395.92 VHN and at the E2 region (0.3 to 0.5 mm from the external surface) was of 339.41 VHN, E1 and E2 being, statistically different. The mean microhardness at the E3 region (0.05 to 0.1 mm from the dentinoenamel junction), for the free surfaces, was of 255.02 VHN, and for the proximal surfaces, was of 269.72 VHN. Following statistical analysis (Variance Analysis Test, p < 0.05), we concluded that enamel microhardness decreased from the external surface towards the dentinoenamel junction. The mean microhardness of coronal dentin was obtained in 3 regions: the DC1 region (0.05 to 0.1 mm from the dentinoenamel junction) - with a mean of 38.68 VHN; the DC2 region (0.3 to 0.5 mm from the dentinoenamel junction) - with a mean of 56.42 VHN; and the DC3 region (0.8 to 1.0 mm from the dentinoenamel junction) - with a mean of 36.49 VHN. Microhardness at DC2 was statistically greater than that of DC1, which, in turn was greater than that at DC3.Universidade Estadual de Campinas2015-11-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/864170210.20396/bjos.v2i6.8641702Brazilian Journal of Oral Sciences; v. 2 n. 6 (2003): Jul./Sept.; 258-263Brazilian Journal of Oral Sciences; Vol. 2 No. 6 (2003): Jul./Sept.; 258-2631677-3225reponame:Brazilian journal of oral sciences (Online)instname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPenghttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641702/9201Cirano, Fabiano RibeiroRomito, Giuseppe AlexandreTodescan, José Hildebrandoinfo:eu-repo/semantics/openAccess2016-02-25T09:29:51Zoai:ojs.periodicos.sbu.unicamp.br:article/8641702Revistahttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/PUBhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/oaibrjorals@fop.unicamp.br||brjorals@fop.unicamp.br1677-32251677-3217opendoar:2016-02-25T09:29:51Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP)false |
dc.title.none.fl_str_mv |
Determination of enamel and coronal dentin microhardness |
title |
Determination of enamel and coronal dentin microhardness |
spellingShingle |
Determination of enamel and coronal dentin microhardness Cirano, Fabiano Ribeiro Microhardness. Enamel. Coronal dentin Odontologia |
title_short |
Determination of enamel and coronal dentin microhardness |
title_full |
Determination of enamel and coronal dentin microhardness |
title_fullStr |
Determination of enamel and coronal dentin microhardness |
title_full_unstemmed |
Determination of enamel and coronal dentin microhardness |
title_sort |
Determination of enamel and coronal dentin microhardness |
author |
Cirano, Fabiano Ribeiro |
author_facet |
Cirano, Fabiano Ribeiro Romito, Giuseppe Alexandre Todescan, José Hildebrando |
author_role |
author |
author2 |
Romito, Giuseppe Alexandre Todescan, José Hildebrando |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Cirano, Fabiano Ribeiro Romito, Giuseppe Alexandre Todescan, José Hildebrando |
dc.subject.por.fl_str_mv |
Microhardness. Enamel. Coronal dentin Odontologia |
topic |
Microhardness. Enamel. Coronal dentin Odontologia |
description |
The Vickers microhardness of enamel and coronal dentin of 30 canines was evaluated. The incisal portion of the crown was discarded by means of a transverse section made 5mm, coronally, from the cemento-enamel junction located on the buccal surface obtaining, thus, the coronal specimen, on which measurements on 3 regions of each dental tissue was carried out. The mean value of microhardness at the E1 region (0.05 to 0.1 mm from the external surface) was of 395.92 VHN and at the E2 region (0.3 to 0.5 mm from the external surface) was of 339.41 VHN, E1 and E2 being, statistically different. The mean microhardness at the E3 region (0.05 to 0.1 mm from the dentinoenamel junction), for the free surfaces, was of 255.02 VHN, and for the proximal surfaces, was of 269.72 VHN. Following statistical analysis (Variance Analysis Test, p < 0.05), we concluded that enamel microhardness decreased from the external surface towards the dentinoenamel junction. The mean microhardness of coronal dentin was obtained in 3 regions: the DC1 region (0.05 to 0.1 mm from the dentinoenamel junction) - with a mean of 38.68 VHN; the DC2 region (0.3 to 0.5 mm from the dentinoenamel junction) - with a mean of 56.42 VHN; and the DC3 region (0.8 to 1.0 mm from the dentinoenamel junction) - with a mean of 36.49 VHN. Microhardness at DC2 was statistically greater than that of DC1, which, in turn was greater than that at DC3. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-11-12 |
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://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641702 10.20396/bjos.v2i6.8641702 |
url |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641702 |
identifier_str_mv |
10.20396/bjos.v2i6.8641702 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641702/9201 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Campinas |
publisher.none.fl_str_mv |
Universidade Estadual de Campinas |
dc.source.none.fl_str_mv |
Brazilian Journal of Oral Sciences; v. 2 n. 6 (2003): Jul./Sept.; 258-263 Brazilian Journal of Oral Sciences; Vol. 2 No. 6 (2003): Jul./Sept.; 258-263 1677-3225 reponame:Brazilian journal of oral sciences (Online) instname:Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
instname_str |
Universidade Estadual de Campinas (UNICAMP) |
instacron_str |
UNICAMP |
institution |
UNICAMP |
reponame_str |
Brazilian journal of oral sciences (Online) |
collection |
Brazilian journal of oral sciences (Online) |
repository.name.fl_str_mv |
Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP) |
repository.mail.fl_str_mv |
brjorals@fop.unicamp.br||brjorals@fop.unicamp.br |
_version_ |
1800216399494250496 |