Evaluation of occlusal rest seat depth in bicuspids: an experimental study
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista odonto ciência (Online) |
Texto Completo: | https://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792 |
Resumo: | Objective: Since premolars may be used as abutment teeth of removable partial dentures, the aim of this study was to evaluate the depth of occlusal rest seats in premolars and its relation with dentin and enamel. Methods: Twenty-nine premolar teeth (extracted for orthodontic reasons) were randomly selected from patients at a University Clinic. The mesio-distal and buccal-lingual dimensions were measured. Rest seats were prepared with round burs (1.0-1.5 mm) in premolar mesial and distal fossae. Rest seats were cut with a microtome and observed in a scanning electron microscope. Tooth abrasion was also evaluated using the Gourdon indice. Results: Significant differences were observed in the enamel thickness before and after rest seat preparations. Maximum enamel thickness in the deepest part of the rest seat was 625 μm in distal and 500 μm in mesial. In more than 50% of the teeth, dentin was reached. Almost 80% were not abraded. Conclusion: In most situations it is not possible to prepare a rest seat with 1.5 mm depth only in enamel. In teeth not abraded it is possible to prepare rest seats with 1.0 mm without reaching dentin. There are significant differences between enamel thickness in distal and mesial, before and after rest seat preparation. |
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Evaluation of occlusal rest seat depth in bicuspids: an experimental studyAvaliação da profundidade de nichos oclusais em pré-molares: um estudo experimentalRemovable partial denturedental abutmentsbicuspiddental enameldentinPrótese parcial removíveldente suportedente premolaresmalte dentáriodentina.Objective: Since premolars may be used as abutment teeth of removable partial dentures, the aim of this study was to evaluate the depth of occlusal rest seats in premolars and its relation with dentin and enamel. Methods: Twenty-nine premolar teeth (extracted for orthodontic reasons) were randomly selected from patients at a University Clinic. The mesio-distal and buccal-lingual dimensions were measured. Rest seats were prepared with round burs (1.0-1.5 mm) in premolar mesial and distal fossae. Rest seats were cut with a microtome and observed in a scanning electron microscope. Tooth abrasion was also evaluated using the Gourdon indice. Results: Significant differences were observed in the enamel thickness before and after rest seat preparations. Maximum enamel thickness in the deepest part of the rest seat was 625 μm in distal and 500 μm in mesial. In more than 50% of the teeth, dentin was reached. Almost 80% were not abraded. Conclusion: In most situations it is not possible to prepare a rest seat with 1.5 mm depth only in enamel. In teeth not abraded it is possible to prepare rest seats with 1.0 mm without reaching dentin. There are significant differences between enamel thickness in distal and mesial, before and after rest seat preparation.Objetivo: Uma vez que os pré-molares são dentes normalmente utilizados como pilares de próteses parcias removíveis tipo Classe I e II de Kennedy, definiu-se como objectivo deste trabalho estudar a profundidade dos seus nichos oclusais e verificar a sua relação com dentina e esmalte. Métodos: Seleccionaram-se de forma aleatória 29 dentes pré-molares (extraídos por motivos ortodônticos) em pacientes de uma Clínica Universitária. Mediram-se as dimensões mésio-distal e vestibulo-lingual. Os nichos oclusais foram preparados com brocas esféricas (1,0 mm-1,5 mm) nas fossas mesiais e distais, cortados com micrótomo e observados num microscópio de varrimento. A abrasão dentária foi avaliada com o índice de Gourdon. Resultados: Observaram-se diferenças estatisticamente significativas na espessura do esmalte antes e depois da preparação dos nichos. A espessura máxima do esmalte no nicho oclusal distal foi 625 μm e 500 μm em mesial. Em mais de 50% dos dentes foi atingida a dentina. Quase 80% dos dentes não estavam abrasionados. Conclusão: Na maioria das situações não é possível preparar nichos com 1,5 mm de profundidade somente no esmalte. Em dentes não abrasionados é possível preparar nichos de 1,0 mm sem atingir a dentina. Há diferenças significativas entre a espessura do esmalte em distal e mesial, antes e depois da preparação dos nichos.EDIPUCRS - Editora Universitária da PUCRS2013-11-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPeer-reviewed Articleapplication/pdfhttps://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792Revista Odonto Ciência; Vol. 28 No. 1 (2013); 18-22Revista Odonto Ciência; v. 28 n. 1 (2013); 18-221980-65230102-9460reponame:Revista odonto ciência (Online)instname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSenghttps://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792/11734Reis Campos, José CarlosCorreia, André RicardoFigueiral, Maria HelenaFonseca, PatríciaRodrigues, FilomenaMorais Branco, Fernandoinfo:eu-repo/semantics/openAccess2014-09-19T18:21:10Zoai:ojs.revistaseletronicas.pucrs.br:article/11792Revistahttps://revistaseletronicas.pucrs.br/ojs/index.php/foPRIhttps://revistaseletronicas.pucrs.br/ojs/index.php/fo/oai||odontociencia@pucrs.br1980-65230102-9460opendoar:2014-09-19T18:21:10Revista odonto ciência (Online) - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)false |
dc.title.none.fl_str_mv |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study Avaliação da profundidade de nichos oclusais em pré-molares: um estudo experimental |
title |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
spellingShingle |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study Reis Campos, José Carlos Removable partial denture dental abutments bicuspid dental enamel dentin Prótese parcial removível dente suporte dente premolar esmalte dentário dentina. |
title_short |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
title_full |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
title_fullStr |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
title_full_unstemmed |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
title_sort |
Evaluation of occlusal rest seat depth in bicuspids: an experimental study |
author |
Reis Campos, José Carlos |
author_facet |
Reis Campos, José Carlos Correia, André Ricardo Figueiral, Maria Helena Fonseca, Patrícia Rodrigues, Filomena Morais Branco, Fernando |
author_role |
author |
author2 |
Correia, André Ricardo Figueiral, Maria Helena Fonseca, Patrícia Rodrigues, Filomena Morais Branco, Fernando |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Reis Campos, José Carlos Correia, André Ricardo Figueiral, Maria Helena Fonseca, Patrícia Rodrigues, Filomena Morais Branco, Fernando |
dc.subject.por.fl_str_mv |
Removable partial denture dental abutments bicuspid dental enamel dentin Prótese parcial removível dente suporte dente premolar esmalte dentário dentina. |
topic |
Removable partial denture dental abutments bicuspid dental enamel dentin Prótese parcial removível dente suporte dente premolar esmalte dentário dentina. |
description |
Objective: Since premolars may be used as abutment teeth of removable partial dentures, the aim of this study was to evaluate the depth of occlusal rest seats in premolars and its relation with dentin and enamel. Methods: Twenty-nine premolar teeth (extracted for orthodontic reasons) were randomly selected from patients at a University Clinic. The mesio-distal and buccal-lingual dimensions were measured. Rest seats were prepared with round burs (1.0-1.5 mm) in premolar mesial and distal fossae. Rest seats were cut with a microtome and observed in a scanning electron microscope. Tooth abrasion was also evaluated using the Gourdon indice. Results: Significant differences were observed in the enamel thickness before and after rest seat preparations. Maximum enamel thickness in the deepest part of the rest seat was 625 μm in distal and 500 μm in mesial. In more than 50% of the teeth, dentin was reached. Almost 80% were not abraded. Conclusion: In most situations it is not possible to prepare a rest seat with 1.5 mm depth only in enamel. In teeth not abraded it is possible to prepare rest seats with 1.0 mm without reaching dentin. There are significant differences between enamel thickness in distal and mesial, before and after rest seat preparation. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-11-03 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792 |
url |
https://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://revistaseletronicas.pucrs.br/ojs/index.php/fo/article/view/11792/11734 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
EDIPUCRS - Editora Universitária da PUCRS |
publisher.none.fl_str_mv |
EDIPUCRS - Editora Universitária da PUCRS |
dc.source.none.fl_str_mv |
Revista Odonto Ciência; Vol. 28 No. 1 (2013); 18-22 Revista Odonto Ciência; v. 28 n. 1 (2013); 18-22 1980-6523 0102-9460 reponame:Revista odonto ciência (Online) instname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) instacron:PUC_RS |
instname_str |
Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) |
instacron_str |
PUC_RS |
institution |
PUC_RS |
reponame_str |
Revista odonto ciência (Online) |
collection |
Revista odonto ciência (Online) |
repository.name.fl_str_mv |
Revista odonto ciência (Online) - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) |
repository.mail.fl_str_mv |
||odontociencia@pucrs.br |
_version_ |
1754820876019171328 |