Evaluation of superficial microhardness in dental enamel with different eruptive ages
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Oral Research |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000400005 |
Resumo: | This study evaluated the superficial microhardness of enamel in teeth at different posteruptive ages (before eruption in the oral cavity, 2-3 years after eruption, 4-10 years after eruption and more than 10 years after eruption). The study sample was composed of 134 specimens of human enamel. One fragment of each tooth was obtained from the flattest central portion of the crown to produce specimens with 3 x 3 mm. The enamel blocks were minimally flattened out and polished in order to obtain a flat surface parallel to the base, which is fundamental for microhardness testing. Microhardness was measured with a microhardness tester and a Knoop diamond indenter, under a static load of 25 g applied for 5 seconds. Comparison between the superficial microhardness obtained for the different groups was performed by analysis of Student's t test. The results demonstrated that superficial microhardness values have a tendency to increase over the years, with statistically significant difference only between unerupted enamel and that with more than 10 years after eruption. According to the present conditions and methodology, it was concluded that there were differences between the superficial micro-hardness of specimens at different eruptive ages, revealing an increasing mineralization. However, this difference was significant only between unerupted specimens and those with more than 10 years after eruption. |
id |
SBPQO-1_d6aec17edd934a57b770d2f5120cf808 |
---|---|
oai_identifier_str |
oai:scielo:S1806-83242008000400005 |
network_acronym_str |
SBPQO-1 |
network_name_str |
Brazilian Oral Research |
repository_id_str |
|
spelling |
Evaluation of superficial microhardness in dental enamel with different eruptive agesDental enamelHardnessTooth eruptionTooth, uneruptedThis study evaluated the superficial microhardness of enamel in teeth at different posteruptive ages (before eruption in the oral cavity, 2-3 years after eruption, 4-10 years after eruption and more than 10 years after eruption). The study sample was composed of 134 specimens of human enamel. One fragment of each tooth was obtained from the flattest central portion of the crown to produce specimens with 3 x 3 mm. The enamel blocks were minimally flattened out and polished in order to obtain a flat surface parallel to the base, which is fundamental for microhardness testing. Microhardness was measured with a microhardness tester and a Knoop diamond indenter, under a static load of 25 g applied for 5 seconds. Comparison between the superficial microhardness obtained for the different groups was performed by analysis of Student's t test. The results demonstrated that superficial microhardness values have a tendency to increase over the years, with statistically significant difference only between unerupted enamel and that with more than 10 years after eruption. According to the present conditions and methodology, it was concluded that there were differences between the superficial micro-hardness of specimens at different eruptive ages, revealing an increasing mineralization. However, this difference was significant only between unerupted specimens and those with more than 10 years after eruption.Sociedade Brasileira de Pesquisa Odontológica - SBPqO2008-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000400005Brazilian Oral Research v.22 n.4 2008reponame:Brazilian Oral Researchinstname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO)instacron:SBPQO10.1590/S1806-83242008000400005info:eu-repo/semantics/openAccessPalti,Dafna GellerMachado,Maria Aparecida de Andrade MoreiraSilva,Salete Moura Bonifacio daAbdo,Ruy Cesar CamargoLima,José Eduardo de Oliveiraeng2009-10-20T00:00:00Zoai:scielo:S1806-83242008000400005Revistahttps://www.scielo.br/j/bor/https://old.scielo.br/oai/scielo-oai.phppob@edu.usp.br||bor@sbpqo.org.br1807-31071806-8324opendoar:2009-10-20T00:00Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO)false |
dc.title.none.fl_str_mv |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
title |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
spellingShingle |
Evaluation of superficial microhardness in dental enamel with different eruptive ages Palti,Dafna Geller Dental enamel Hardness Tooth eruption Tooth, unerupted |
title_short |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
title_full |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
title_fullStr |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
title_full_unstemmed |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
title_sort |
Evaluation of superficial microhardness in dental enamel with different eruptive ages |
author |
Palti,Dafna Geller |
author_facet |
Palti,Dafna Geller Machado,Maria Aparecida de Andrade Moreira Silva,Salete Moura Bonifacio da Abdo,Ruy Cesar Camargo Lima,José Eduardo de Oliveira |
author_role |
author |
author2 |
Machado,Maria Aparecida de Andrade Moreira Silva,Salete Moura Bonifacio da Abdo,Ruy Cesar Camargo Lima,José Eduardo de Oliveira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Palti,Dafna Geller Machado,Maria Aparecida de Andrade Moreira Silva,Salete Moura Bonifacio da Abdo,Ruy Cesar Camargo Lima,José Eduardo de Oliveira |
dc.subject.por.fl_str_mv |
Dental enamel Hardness Tooth eruption Tooth, unerupted |
topic |
Dental enamel Hardness Tooth eruption Tooth, unerupted |
description |
This study evaluated the superficial microhardness of enamel in teeth at different posteruptive ages (before eruption in the oral cavity, 2-3 years after eruption, 4-10 years after eruption and more than 10 years after eruption). The study sample was composed of 134 specimens of human enamel. One fragment of each tooth was obtained from the flattest central portion of the crown to produce specimens with 3 x 3 mm. The enamel blocks were minimally flattened out and polished in order to obtain a flat surface parallel to the base, which is fundamental for microhardness testing. Microhardness was measured with a microhardness tester and a Knoop diamond indenter, under a static load of 25 g applied for 5 seconds. Comparison between the superficial microhardness obtained for the different groups was performed by analysis of Student's t test. The results demonstrated that superficial microhardness values have a tendency to increase over the years, with statistically significant difference only between unerupted enamel and that with more than 10 years after eruption. According to the present conditions and methodology, it was concluded that there were differences between the superficial micro-hardness of specimens at different eruptive ages, revealing an increasing mineralization. However, this difference was significant only between unerupted specimens and those with more than 10 years after eruption. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-12-01 |
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=S1806-83242008000400005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000400005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1806-83242008000400005 |
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 |
Sociedade Brasileira de Pesquisa Odontológica - SBPqO |
publisher.none.fl_str_mv |
Sociedade Brasileira de Pesquisa Odontológica - SBPqO |
dc.source.none.fl_str_mv |
Brazilian Oral Research v.22 n.4 2008 reponame:Brazilian Oral Research instname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO) instacron:SBPQO |
instname_str |
Sociedade Brasileira de Pesquisa Odontológica (SBPqO) |
instacron_str |
SBPQO |
institution |
SBPQO |
reponame_str |
Brazilian Oral Research |
collection |
Brazilian Oral Research |
repository.name.fl_str_mv |
Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO) |
repository.mail.fl_str_mv |
pob@edu.usp.br||bor@sbpqo.org.br |
_version_ |
1750318321299881984 |