Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4103/0970-9290.156790 http://hdl.handle.net/11449/171854 |
Resumo: | Context: Discrepancies at the abutment/crown interface can affect the longevity of zirconia restorations. Aim: The aim was to evaluate the marginal and internal discrepancies (MD and ID) of zirconia copings manufactured by two milling systems with different finish lines. Materials and Methods: Three aluminum-master-dies (h = 5.5 mm; Ψ =7.5 mm; 6), with different finish lines (large chamfer [LC]; tilted chamfer [TC]; rounded shoulder [RS]) were fabricated. Twenty impressions were made from each master die and poured. Sixty zirconia copings were manufactured and divided according to the factors finish line and milling system (n = 10): CAD<inf>LC</inf> = Computer-aided design/computer-aided manufacturing (CAD/CAM) + LC; CAD<inf>TC</inf> = CAD/CAM + TC; CAD<inf>RS</inf> = CAD/CAM + RS; MAD<inf>LC</inf> = manually aided design/manually aided manufacturing (MAD/MAM) + LC; MAD<inf>TC</inf> = MAD/MAM + TC; and MAD<inf>RS</inf> = MAD/MAM + RS. For MD analysis, each coping was fixed, and the distance between the external edges of the coping and the edge of the cervical preparation was measured (50 points). Using the same copings, the ID of each coping was evaluated, by the replica technique, at 12 points equally distributed among the regions (n = 10): Ray (R), axial (A), and occlusal (Occl). The measurements were performed by optical microscopy (&KHgr;250). The data (μm) were subjected to parametric and non-parametric statistical analyses. Results: For the MAD/MAM system, the finish line (P = 0.0001) affected significantly the MD median values (μm): LC = 251.80<sup>a</sup>, RS = 68.40<sup>a</sup> and TC = 8.10<sup>b</sup> (Dunn′s test). For the CAD/CAM system, the median MD values (μm) were not affected by the factor finish line (P = 0.4037): LC = 0.82<sup>a</sup>, RS = 0.52<sup>a</sup>, and TC = 0.89<sup>a</sup>. For the ID, it was observed interaction between the finish line types and the region (P = 0.0001) and between region and milling system (P = 0.0031) (RM-ANOVA). Conclusions: The CAD/CAM system presented lower MD values, regardless the finish line. However, the MAD/MAM system showed ID values smaller than those of CAD/CAM. |
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Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line designComputer-aided design/computer-aided manufacturing systemInternal discrepancyManually aided design/manually aided manufacturing systemMarginal discrepancyReplica techniqueContext: Discrepancies at the abutment/crown interface can affect the longevity of zirconia restorations. Aim: The aim was to evaluate the marginal and internal discrepancies (MD and ID) of zirconia copings manufactured by two milling systems with different finish lines. Materials and Methods: Three aluminum-master-dies (h = 5.5 mm; Ψ =7.5 mm; 6), with different finish lines (large chamfer [LC]; tilted chamfer [TC]; rounded shoulder [RS]) were fabricated. Twenty impressions were made from each master die and poured. Sixty zirconia copings were manufactured and divided according to the factors finish line and milling system (n = 10): CAD<inf>LC</inf> = Computer-aided design/computer-aided manufacturing (CAD/CAM) + LC; CAD<inf>TC</inf> = CAD/CAM + TC; CAD<inf>RS</inf> = CAD/CAM + RS; MAD<inf>LC</inf> = manually aided design/manually aided manufacturing (MAD/MAM) + LC; MAD<inf>TC</inf> = MAD/MAM + TC; and MAD<inf>RS</inf> = MAD/MAM + RS. For MD analysis, each coping was fixed, and the distance between the external edges of the coping and the edge of the cervical preparation was measured (50 points). Using the same copings, the ID of each coping was evaluated, by the replica technique, at 12 points equally distributed among the regions (n = 10): Ray (R), axial (A), and occlusal (Occl). The measurements were performed by optical microscopy (&KHgr;250). The data (μm) were subjected to parametric and non-parametric statistical analyses. Results: For the MAD/MAM system, the finish line (P = 0.0001) affected significantly the MD median values (μm): LC = 251.80<sup>a</sup>, RS = 68.40<sup>a</sup> and TC = 8.10<sup>b</sup> (Dunn′s test). For the CAD/CAM system, the median MD values (μm) were not affected by the factor finish line (P = 0.4037): LC = 0.82<sup>a</sup>, RS = 0.52<sup>a</sup>, and TC = 0.89<sup>a</sup>. For the ID, it was observed interaction between the finish line types and the region (P = 0.0001) and between region and milling system (P = 0.0031) (RM-ANOVA). Conclusions: The CAD/CAM system presented lower MD values, regardless the finish line. However, the MAD/MAM system showed ID values smaller than those of CAD/CAM.Department of Restorative Dentistry, Federal University of Paraíba (UFPB)Department of Dental Materials and Prosthodontics, São José dos Campos Dental School (UNESP/SJC)Private ClinicalDepartment of Dentistry, Federal University of Rio Grande do Norte (UFRN)Department of Dental Materials and Prosthodontics, São José dos Campos Dental School (UNESP/SJC)Universidade Federal da Paraíba (UFPB)Universidade Estadual Paulista (Unesp)Private ClinicalRibeiro, Isabella Lima ArraisCampos, Fernanda [UNESP]Sousa, Rafael SantiagoAlves, Maria Luiza LimaRodrigues, Dalton MatosSouza, Rodrigo Othavio AssunçãoBottino, Marco Antonio [UNESP]2018-12-11T16:57:28Z2018-12-11T16:57:28Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article15-20http://dx.doi.org/10.4103/0970-9290.156790Indian Journal of Dental Research, v. 26, n. 1, p. 15-20, 2015.1998-36030970-9290http://hdl.handle.net/11449/17185410.4103/0970-9290.1567902-s2.0-849296223219234456003563666Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIndian Journal of Dental Research0,2660,266info:eu-repo/semantics/openAccess2021-10-23T17:45:44Zoai:repositorio.unesp.br:11449/171854Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:32:36.287392Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
title |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
spellingShingle |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design Ribeiro, Isabella Lima Arrais Computer-aided design/computer-aided manufacturing system Internal discrepancy Manually aided design/manually aided manufacturing system Marginal discrepancy Replica technique |
title_short |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
title_full |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
title_fullStr |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
title_full_unstemmed |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
title_sort |
Marginal and internal discrepancies of zirconia copings: Effects of milling system and finish line design |
author |
Ribeiro, Isabella Lima Arrais |
author_facet |
Ribeiro, Isabella Lima Arrais Campos, Fernanda [UNESP] Sousa, Rafael Santiago Alves, Maria Luiza Lima Rodrigues, Dalton Matos Souza, Rodrigo Othavio Assunção Bottino, Marco Antonio [UNESP] |
author_role |
author |
author2 |
Campos, Fernanda [UNESP] Sousa, Rafael Santiago Alves, Maria Luiza Lima Rodrigues, Dalton Matos Souza, Rodrigo Othavio Assunção Bottino, Marco Antonio [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal da Paraíba (UFPB) Universidade Estadual Paulista (Unesp) Private Clinical |
dc.contributor.author.fl_str_mv |
Ribeiro, Isabella Lima Arrais Campos, Fernanda [UNESP] Sousa, Rafael Santiago Alves, Maria Luiza Lima Rodrigues, Dalton Matos Souza, Rodrigo Othavio Assunção Bottino, Marco Antonio [UNESP] |
dc.subject.por.fl_str_mv |
Computer-aided design/computer-aided manufacturing system Internal discrepancy Manually aided design/manually aided manufacturing system Marginal discrepancy Replica technique |
topic |
Computer-aided design/computer-aided manufacturing system Internal discrepancy Manually aided design/manually aided manufacturing system Marginal discrepancy Replica technique |
description |
Context: Discrepancies at the abutment/crown interface can affect the longevity of zirconia restorations. Aim: The aim was to evaluate the marginal and internal discrepancies (MD and ID) of zirconia copings manufactured by two milling systems with different finish lines. Materials and Methods: Three aluminum-master-dies (h = 5.5 mm; Ψ =7.5 mm; 6), with different finish lines (large chamfer [LC]; tilted chamfer [TC]; rounded shoulder [RS]) were fabricated. Twenty impressions were made from each master die and poured. Sixty zirconia copings were manufactured and divided according to the factors finish line and milling system (n = 10): CAD<inf>LC</inf> = Computer-aided design/computer-aided manufacturing (CAD/CAM) + LC; CAD<inf>TC</inf> = CAD/CAM + TC; CAD<inf>RS</inf> = CAD/CAM + RS; MAD<inf>LC</inf> = manually aided design/manually aided manufacturing (MAD/MAM) + LC; MAD<inf>TC</inf> = MAD/MAM + TC; and MAD<inf>RS</inf> = MAD/MAM + RS. For MD analysis, each coping was fixed, and the distance between the external edges of the coping and the edge of the cervical preparation was measured (50 points). Using the same copings, the ID of each coping was evaluated, by the replica technique, at 12 points equally distributed among the regions (n = 10): Ray (R), axial (A), and occlusal (Occl). The measurements were performed by optical microscopy (&KHgr;250). The data (μm) were subjected to parametric and non-parametric statistical analyses. Results: For the MAD/MAM system, the finish line (P = 0.0001) affected significantly the MD median values (μm): LC = 251.80<sup>a</sup>, RS = 68.40<sup>a</sup> and TC = 8.10<sup>b</sup> (Dunn′s test). For the CAD/CAM system, the median MD values (μm) were not affected by the factor finish line (P = 0.4037): LC = 0.82<sup>a</sup>, RS = 0.52<sup>a</sup>, and TC = 0.89<sup>a</sup>. For the ID, it was observed interaction between the finish line types and the region (P = 0.0001) and between region and milling system (P = 0.0031) (RM-ANOVA). Conclusions: The CAD/CAM system presented lower MD values, regardless the finish line. However, the MAD/MAM system showed ID values smaller than those of CAD/CAM. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2018-12-11T16:57:28Z 2018-12-11T16:57:28Z |
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 |
http://dx.doi.org/10.4103/0970-9290.156790 Indian Journal of Dental Research, v. 26, n. 1, p. 15-20, 2015. 1998-3603 0970-9290 http://hdl.handle.net/11449/171854 10.4103/0970-9290.156790 2-s2.0-84929622321 9234456003563666 |
url |
http://dx.doi.org/10.4103/0970-9290.156790 http://hdl.handle.net/11449/171854 |
identifier_str_mv |
Indian Journal of Dental Research, v. 26, n. 1, p. 15-20, 2015. 1998-3603 0970-9290 10.4103/0970-9290.156790 2-s2.0-84929622321 9234456003563666 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Indian Journal of Dental Research 0,266 0,266 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
15-20 |
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 |
|
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1808128944536289280 |