An in vitro assessment of type, position and incidence of isthmus in human permanent molars

Detalhes bibliográficos
Autor(a) principal: LIMA, Fernando José Camello de
Data de Publicação: 2014
Outros Autores: MONTAGNER, Francisco, JACINTO, Rogério Castilho, AMBROSANO, Glaucia Maria Bovi, GOMES, Brenda Paula Figueiredo de Almeida
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/84013
Resumo: Root canal anatomical complexities, such as isthmus, may limit the action of the endodontic instruments, irrigant solutions and intracanal medications, leading to endodontic treatment failure. Objectives: This in vitro study assessed the type, position and incidence of isthmus in human permanent molars. Material and Methods: One hundred and twenty eight upper and lower first and second permanent molars were analyzed. The roots were embedded in transparent resin, and then split at different distances from the apex (1.0-2.5-4.0-5.5-7.0 mm). Following the sample examination in stereomicroscope, the data were submitted to chi-square statistical test at a 5% significance level. Results: The highest isthmus incidence was at 7.0 mm from the root apex in all samples, except the distal root of lower molars (at 5.5 mm). In upper and lower molars, type V (complete isthmus with a continuous opening between the two main root canals) was the most common classification of isthmus (28.8%). In the mesial root of first and second mandibular molars, type IV had the highest incidence (36% and 23.9%, respectively). Conclusion: It was concluded that isthmus was widely found in flat roots, with a low percentage in areas close to the apex. In upper and lower molars, these structures were most frequently found at 7 mm from the apex.
id USP-17_90e7d487c7cbfad80ed164e3dad75487
oai_identifier_str oai:revistas.usp.br:article/84013
network_acronym_str USP-17
network_name_str Journal of applied oral science (Online)
repository_id_str
spelling An in vitro assessment of type, position and incidence of isthmus in human permanent molars Root canal anatomical complexities, such as isthmus, may limit the action of the endodontic instruments, irrigant solutions and intracanal medications, leading to endodontic treatment failure. Objectives: This in vitro study assessed the type, position and incidence of isthmus in human permanent molars. Material and Methods: One hundred and twenty eight upper and lower first and second permanent molars were analyzed. The roots were embedded in transparent resin, and then split at different distances from the apex (1.0-2.5-4.0-5.5-7.0 mm). Following the sample examination in stereomicroscope, the data were submitted to chi-square statistical test at a 5% significance level. Results: The highest isthmus incidence was at 7.0 mm from the root apex in all samples, except the distal root of lower molars (at 5.5 mm). In upper and lower molars, type V (complete isthmus with a continuous opening between the two main root canals) was the most common classification of isthmus (28.8%). In the mesial root of first and second mandibular molars, type IV had the highest incidence (36% and 23.9%, respectively). Conclusion: It was concluded that isthmus was widely found in flat roots, with a low percentage in areas close to the apex. In upper and lower molars, these structures were most frequently found at 7 mm from the apex. Universidade de São Paulo. Faculdade de Odontologia de Bauru2014-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/8401310.1590/1678-775720130585Journal of Applied Oral Science; Vol. 22 No. 4 (2014); 274-281Journal of Applied Oral Science; Vol. 22 Núm. 4 (2014); 274-281Journal of Applied Oral Science; v. 22 n. 4 (2014); 274-2811678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/84013/86860Copyright (c) 2014 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessLIMA, Fernando José Camello de MONTAGNER, Francisco JACINTO, Rogério Castilho AMBROSANO, Glaucia Maria Bovi GOMES, Brenda Paula Figueiredo de Almeida 2014-08-26T23:56:55Zoai:revistas.usp.br:article/84013Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2014-08-26T23:56:55Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv An in vitro assessment of type, position and incidence of isthmus in human permanent molars
title An in vitro assessment of type, position and incidence of isthmus in human permanent molars
spellingShingle An in vitro assessment of type, position and incidence of isthmus in human permanent molars
LIMA, Fernando José Camello de
title_short An in vitro assessment of type, position and incidence of isthmus in human permanent molars
title_full An in vitro assessment of type, position and incidence of isthmus in human permanent molars
title_fullStr An in vitro assessment of type, position and incidence of isthmus in human permanent molars
title_full_unstemmed An in vitro assessment of type, position and incidence of isthmus in human permanent molars
title_sort An in vitro assessment of type, position and incidence of isthmus in human permanent molars
author LIMA, Fernando José Camello de
author_facet LIMA, Fernando José Camello de
MONTAGNER, Francisco
JACINTO, Rogério Castilho
AMBROSANO, Glaucia Maria Bovi
GOMES, Brenda Paula Figueiredo de Almeida
author_role author
author2 MONTAGNER, Francisco
JACINTO, Rogério Castilho
AMBROSANO, Glaucia Maria Bovi
GOMES, Brenda Paula Figueiredo de Almeida
author2_role author
author
author
author
dc.contributor.author.fl_str_mv LIMA, Fernando José Camello de
MONTAGNER, Francisco
JACINTO, Rogério Castilho
AMBROSANO, Glaucia Maria Bovi
GOMES, Brenda Paula Figueiredo de Almeida
description Root canal anatomical complexities, such as isthmus, may limit the action of the endodontic instruments, irrigant solutions and intracanal medications, leading to endodontic treatment failure. Objectives: This in vitro study assessed the type, position and incidence of isthmus in human permanent molars. Material and Methods: One hundred and twenty eight upper and lower first and second permanent molars were analyzed. The roots were embedded in transparent resin, and then split at different distances from the apex (1.0-2.5-4.0-5.5-7.0 mm). Following the sample examination in stereomicroscope, the data were submitted to chi-square statistical test at a 5% significance level. Results: The highest isthmus incidence was at 7.0 mm from the root apex in all samples, except the distal root of lower molars (at 5.5 mm). In upper and lower molars, type V (complete isthmus with a continuous opening between the two main root canals) was the most common classification of isthmus (28.8%). In the mesial root of first and second mandibular molars, type IV had the highest incidence (36% and 23.9%, respectively). Conclusion: It was concluded that isthmus was widely found in flat roots, with a low percentage in areas close to the apex. In upper and lower molars, these structures were most frequently found at 7 mm from the apex.
publishDate 2014
dc.date.none.fl_str_mv 2014-07-01
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/84013
10.1590/1678-775720130585
url https://www.revistas.usp.br/jaos/article/view/84013
identifier_str_mv 10.1590/1678-775720130585
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/84013/86860
dc.rights.driver.fl_str_mv Copyright (c) 2014 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2014 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. 22 No. 4 (2014); 274-281
Journal of Applied Oral Science; Vol. 22 Núm. 4 (2014); 274-281
Journal of Applied Oral Science; v. 22 n. 4 (2014); 274-281
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
_version_ 1800221678162149376