Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Dental Journal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402019000600569 |
Resumo: | Abstract This study evaluated the influence of a retentive shoulder design to prevent early failure of three resin composite build-ups on molars. Ninety-six intact extracted human maxillary third molars were assigned to two groups (n=48) based on occlusal, buccal cusps only and all cusps reduction. The groups were divided into two subgroups: pin retained and non-pin retained build-ups resulting in four groups (n=24), according the cusps reduction: pin retained/partial, pin retained/complete, non-pin retained/partial, non-pin retained/complete. Occlusal reduction was 3 mm with a semi-lunar retentive shoulder of 3 mm and an axial wall height of 1.5 mm. Groups were restored using a microhybrid, flowable or titanium reinforced resin composite. Modified self-curing acrylic resin provisional crowns were fabricated, cemented with non-eugenol temporary cement and thermal cycled. An instron machine applied tension to the provisional crowns parallel to the long axis of the tooth until dislodgement. A three-way analysis of variance was conducted on the influence of the variables on the retention of the core build-up. Ninety-three build-ups were retained under tensile load, while three core build-ups without pins were dislodged. Three-way analysis of variance showed no statistically significant difference between core build-ups using a retentive shoulder and pin retained core build-ups when tested under tensile load. With the advent of adhesive systems, increased surface area and retentive shoulder design can provide a retentive core foundation to prevent early failures of core build-ups during indirect restoration fabrication which will contribute to the longevity of final restorations. |
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Brazilian Dental Journal |
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Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Upsresin compositecore materialsretentionretentive shoulder designpin retentionAbstract This study evaluated the influence of a retentive shoulder design to prevent early failure of three resin composite build-ups on molars. Ninety-six intact extracted human maxillary third molars were assigned to two groups (n=48) based on occlusal, buccal cusps only and all cusps reduction. The groups were divided into two subgroups: pin retained and non-pin retained build-ups resulting in four groups (n=24), according the cusps reduction: pin retained/partial, pin retained/complete, non-pin retained/partial, non-pin retained/complete. Occlusal reduction was 3 mm with a semi-lunar retentive shoulder of 3 mm and an axial wall height of 1.5 mm. Groups were restored using a microhybrid, flowable or titanium reinforced resin composite. Modified self-curing acrylic resin provisional crowns were fabricated, cemented with non-eugenol temporary cement and thermal cycled. An instron machine applied tension to the provisional crowns parallel to the long axis of the tooth until dislodgement. A three-way analysis of variance was conducted on the influence of the variables on the retention of the core build-up. Ninety-three build-ups were retained under tensile load, while three core build-ups without pins were dislodged. Three-way analysis of variance showed no statistically significant difference between core build-ups using a retentive shoulder and pin retained core build-ups when tested under tensile load. With the advent of adhesive systems, increased surface area and retentive shoulder design can provide a retentive core foundation to prevent early failures of core build-ups during indirect restoration fabrication which will contribute to the longevity of final restorations.Fundação Odontológica de Ribeirão Preto2019-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402019000600569Brazilian Dental Journal v.30 n.6 2019reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/0103-6440201902874info:eu-repo/semantics/openAccessBonilla,Esteban DPameijer,Cornelis H.Nascimento,Cassio doGarcia-Godoy,FranklinHayashi,MarcKhabbaz,ChristineBonilla,Brian C.Pedrazzi,Viniciuseng2019-11-25T00:00:00Zoai:scielo:S0103-64402019000600569Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2019-11-25T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false |
dc.title.none.fl_str_mv |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
title |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
spellingShingle |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups Bonilla,Esteban D resin composite core materials retention retentive shoulder design pin retention |
title_short |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
title_full |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
title_fullStr |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
title_full_unstemmed |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
title_sort |
Influence of a Retentive Shoulder Design to Prevent Early Failure of Three Core Build-Ups |
author |
Bonilla,Esteban D |
author_facet |
Bonilla,Esteban D Pameijer,Cornelis H. Nascimento,Cassio do Garcia-Godoy,Franklin Hayashi,Marc Khabbaz,Christine Bonilla,Brian C. Pedrazzi,Vinicius |
author_role |
author |
author2 |
Pameijer,Cornelis H. Nascimento,Cassio do Garcia-Godoy,Franklin Hayashi,Marc Khabbaz,Christine Bonilla,Brian C. Pedrazzi,Vinicius |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Bonilla,Esteban D Pameijer,Cornelis H. Nascimento,Cassio do Garcia-Godoy,Franklin Hayashi,Marc Khabbaz,Christine Bonilla,Brian C. Pedrazzi,Vinicius |
dc.subject.por.fl_str_mv |
resin composite core materials retention retentive shoulder design pin retention |
topic |
resin composite core materials retention retentive shoulder design pin retention |
description |
Abstract This study evaluated the influence of a retentive shoulder design to prevent early failure of three resin composite build-ups on molars. Ninety-six intact extracted human maxillary third molars were assigned to two groups (n=48) based on occlusal, buccal cusps only and all cusps reduction. The groups were divided into two subgroups: pin retained and non-pin retained build-ups resulting in four groups (n=24), according the cusps reduction: pin retained/partial, pin retained/complete, non-pin retained/partial, non-pin retained/complete. Occlusal reduction was 3 mm with a semi-lunar retentive shoulder of 3 mm and an axial wall height of 1.5 mm. Groups were restored using a microhybrid, flowable or titanium reinforced resin composite. Modified self-curing acrylic resin provisional crowns were fabricated, cemented with non-eugenol temporary cement and thermal cycled. An instron machine applied tension to the provisional crowns parallel to the long axis of the tooth until dislodgement. A three-way analysis of variance was conducted on the influence of the variables on the retention of the core build-up. Ninety-three build-ups were retained under tensile load, while three core build-ups without pins were dislodged. Three-way analysis of variance showed no statistically significant difference between core build-ups using a retentive shoulder and pin retained core build-ups when tested under tensile load. With the advent of adhesive systems, increased surface area and retentive shoulder design can provide a retentive core foundation to prevent early failures of core build-ups during indirect restoration fabrication which will contribute to the longevity of final restorations. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11-01 |
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=S0103-64402019000600569 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402019000600569 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-6440201902874 |
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 |
Fundação Odontológica de Ribeirão Preto |
publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
dc.source.none.fl_str_mv |
Brazilian Dental Journal v.30 n.6 2019 reponame:Brazilian Dental Journal instname:Fundação Odontológica de Ribeirão Preto (FUNORP) instacron:FUNORP |
instname_str |
Fundação Odontológica de Ribeirão Preto (FUNORP) |
instacron_str |
FUNORP |
institution |
FUNORP |
reponame_str |
Brazilian Dental Journal |
collection |
Brazilian Dental Journal |
repository.name.fl_str_mv |
Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP) |
repository.mail.fl_str_mv |
bdj@forp.usp.br||sergio@fosjc.unesp.br |
_version_ |
1754204095747457024 |