Marginal adaptation of Class 2 adhesive restorations
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/225115 |
Resumo: | Objective: Control of microleakage represents a challenge for posterior composite restorations. The technique for composite placement may reduce microleakage. The null hypothesis of this in vitro study was that centripetal incremental insertion of composite resin would result in less microleakage than that obtained with the oblique incremental technique or bulk technique. Method and Materials: Standardized Class 2 preparations were made in 60 caries-free extracted third molars and randomly assigned to 3 groups (n = 20): (1) oblique incremental insertion technique (control), (2) centripetal incremental insertion technique, and (3) bulk insertion. The teeth were restored with a total-etch adhesive and microhybrid composite resin. The specimens were isolated with nail varnish except for a 2-mmwide area around the restoration and then thermocycled (1,000 thermal cycles, 5°C/55°C; 30-second dwell time). The specimens were immersed in an aqueous solution of 50% silver nitrate for 24 hours, followed by 8 hours of immersion in a photo-developing solution and subsequently evaluated for leakage. The microleakage scores (0 to 4) obtained from the occlusal and cervical walls were analyzed with median nonparametric tests (P < .05). Results: The null hypothesis was rejected. All techniques attained statistically similar dentin microleakage scores (P = .15). The centripetal insertion technique displayed significantly less microleakage than the oblique technique at the enamel margins (P = .04). Conclusion: None of the techniques eliminated marginal microleakage in Class 2 preparations. However, in occlusal areas, the centripetal technique performed significantly better than the other techniques. |
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Marginal adaptation of Class 2 adhesive restorationsBulkCentripetal placementClass 2 composite resinDentinEnamelMarginal adaptationOblique placementObjective: Control of microleakage represents a challenge for posterior composite restorations. The technique for composite placement may reduce microleakage. The null hypothesis of this in vitro study was that centripetal incremental insertion of composite resin would result in less microleakage than that obtained with the oblique incremental technique or bulk technique. Method and Materials: Standardized Class 2 preparations were made in 60 caries-free extracted third molars and randomly assigned to 3 groups (n = 20): (1) oblique incremental insertion technique (control), (2) centripetal incremental insertion technique, and (3) bulk insertion. The teeth were restored with a total-etch adhesive and microhybrid composite resin. The specimens were isolated with nail varnish except for a 2-mmwide area around the restoration and then thermocycled (1,000 thermal cycles, 5°C/55°C; 30-second dwell time). The specimens were immersed in an aqueous solution of 50% silver nitrate for 24 hours, followed by 8 hours of immersion in a photo-developing solution and subsequently evaluated for leakage. The microleakage scores (0 to 4) obtained from the occlusal and cervical walls were analyzed with median nonparametric tests (P < .05). Results: The null hypothesis was rejected. All techniques attained statistically similar dentin microleakage scores (P = .15). The centripetal insertion technique displayed significantly less microleakage than the oblique technique at the enamel margins (P = .04). Conclusion: None of the techniques eliminated marginal microleakage in Class 2 preparations. However, in occlusal areas, the centripetal technique performed significantly better than the other techniques.Department of Comprehensive Care School of Dental Medicine Case Western Reserve University, Cleveland, OHDepartment of Restorative Dentistry Araraquara School of Dentistry São Paulo State University (UNESP), Araraquara, São PauloCase Western Reserve University School of Dental Medicine Department of Comprehensive Care, 10900 Euclid Avenue, Cleveland, OH 44106-4905Department of Restorative Dentistry Araraquara School of Dentistry São Paulo State University (UNESP), Araraquara, São PauloCase Western Reserve UniversityUniversidade Estadual Paulista (UNESP)School of Dental MedicineDuarte Jr., SillasSaad, José Roberto Cury [UNESP]2022-04-28T20:40:06Z2022-04-28T20:40:06Z2008-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article413-419Quintessence International, v. 39, n. 5, p. 413-419, 2008.0033-6572http://hdl.handle.net/11449/2251152-s2.0-42349108757Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengQuintessence Internationalinfo:eu-repo/semantics/openAccess2022-04-28T20:40:06Zoai:repositorio.unesp.br:11449/225115Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:37:49.676640Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Marginal adaptation of Class 2 adhesive restorations |
title |
Marginal adaptation of Class 2 adhesive restorations |
spellingShingle |
Marginal adaptation of Class 2 adhesive restorations Duarte Jr., Sillas Bulk Centripetal placement Class 2 composite resin Dentin Enamel Marginal adaptation Oblique placement |
title_short |
Marginal adaptation of Class 2 adhesive restorations |
title_full |
Marginal adaptation of Class 2 adhesive restorations |
title_fullStr |
Marginal adaptation of Class 2 adhesive restorations |
title_full_unstemmed |
Marginal adaptation of Class 2 adhesive restorations |
title_sort |
Marginal adaptation of Class 2 adhesive restorations |
author |
Duarte Jr., Sillas |
author_facet |
Duarte Jr., Sillas Saad, José Roberto Cury [UNESP] |
author_role |
author |
author2 |
Saad, José Roberto Cury [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Case Western Reserve University Universidade Estadual Paulista (UNESP) School of Dental Medicine |
dc.contributor.author.fl_str_mv |
Duarte Jr., Sillas Saad, José Roberto Cury [UNESP] |
dc.subject.por.fl_str_mv |
Bulk Centripetal placement Class 2 composite resin Dentin Enamel Marginal adaptation Oblique placement |
topic |
Bulk Centripetal placement Class 2 composite resin Dentin Enamel Marginal adaptation Oblique placement |
description |
Objective: Control of microleakage represents a challenge for posterior composite restorations. The technique for composite placement may reduce microleakage. The null hypothesis of this in vitro study was that centripetal incremental insertion of composite resin would result in less microleakage than that obtained with the oblique incremental technique or bulk technique. Method and Materials: Standardized Class 2 preparations were made in 60 caries-free extracted third molars and randomly assigned to 3 groups (n = 20): (1) oblique incremental insertion technique (control), (2) centripetal incremental insertion technique, and (3) bulk insertion. The teeth were restored with a total-etch adhesive and microhybrid composite resin. The specimens were isolated with nail varnish except for a 2-mmwide area around the restoration and then thermocycled (1,000 thermal cycles, 5°C/55°C; 30-second dwell time). The specimens were immersed in an aqueous solution of 50% silver nitrate for 24 hours, followed by 8 hours of immersion in a photo-developing solution and subsequently evaluated for leakage. The microleakage scores (0 to 4) obtained from the occlusal and cervical walls were analyzed with median nonparametric tests (P < .05). Results: The null hypothesis was rejected. All techniques attained statistically similar dentin microleakage scores (P = .15). The centripetal insertion technique displayed significantly less microleakage than the oblique technique at the enamel margins (P = .04). Conclusion: None of the techniques eliminated marginal microleakage in Class 2 preparations. However, in occlusal areas, the centripetal technique performed significantly better than the other techniques. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-05-01 2022-04-28T20:40:06Z 2022-04-28T20:40:06Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Quintessence International, v. 39, n. 5, p. 413-419, 2008. 0033-6572 http://hdl.handle.net/11449/225115 2-s2.0-42349108757 |
identifier_str_mv |
Quintessence International, v. 39, n. 5, p. 413-419, 2008. 0033-6572 2-s2.0-42349108757 |
url |
http://hdl.handle.net/11449/225115 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Quintessence International |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
413-419 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128679886192640 |