Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns

The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for cro...

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Autores principales: Salamoni Sinhori, Bruna, de Andrada, Mauro Amaral Caldeira, Carpena Lopes, Guilherme, Monteiro Junior, Sylvio, Baratieri, Luiz Narciso
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2017
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5382306/
https://www.ncbi.nlm.nih.gov/pubmed/28424734
http://dx.doi.org/10.1155/2017/2078526
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author Salamoni Sinhori, Bruna
de Andrada, Mauro Amaral Caldeira
Carpena Lopes, Guilherme
Monteiro Junior, Sylvio
Baratieri, Luiz Narciso
author_facet Salamoni Sinhori, Bruna
de Andrada, Mauro Amaral Caldeira
Carpena Lopes, Guilherme
Monteiro Junior, Sylvio
Baratieri, Luiz Narciso
author_sort Salamoni Sinhori, Bruna
collection PubMed
description The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, which were divided into two groups (n = 10) G1, teeth that received surface roughening similar to preparation without polishing, and G2 (control), polished preparations. After the preparations were completed the teeth were scanned (Cerec Bluecam, Sirona, Bensheim, Germany), and the crowns were designed and machined using CAD/CAM technology (Sirona, Bensheim, Germany). The adaptation of the pieces was evaluated using polyvinyl siloxane replicas and stereomicroscope photographs with 70x magnifications. The normality test indicated a nonnormal result, so a Man–Whitney nonparametric test was performed. One out of the 24 measured regions showed a statistically significant difference (p = 0.0494). With this study it can be concluded that crowns fabricated by CAD/CAM technology performed on unpolished preparations are not influenced by the internal marginal adaptation and the ceramic part and are different from polished preparations.
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spelling pubmed-53823062017-04-19 Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns Salamoni Sinhori, Bruna de Andrada, Mauro Amaral Caldeira Carpena Lopes, Guilherme Monteiro Junior, Sylvio Baratieri, Luiz Narciso Int J Biomater Research Article The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, which were divided into two groups (n = 10) G1, teeth that received surface roughening similar to preparation without polishing, and G2 (control), polished preparations. After the preparations were completed the teeth were scanned (Cerec Bluecam, Sirona, Bensheim, Germany), and the crowns were designed and machined using CAD/CAM technology (Sirona, Bensheim, Germany). The adaptation of the pieces was evaluated using polyvinyl siloxane replicas and stereomicroscope photographs with 70x magnifications. The normality test indicated a nonnormal result, so a Man–Whitney nonparametric test was performed. One out of the 24 measured regions showed a statistically significant difference (p = 0.0494). With this study it can be concluded that crowns fabricated by CAD/CAM technology performed on unpolished preparations are not influenced by the internal marginal adaptation and the ceramic part and are different from polished preparations. Hindawi 2017 2017-03-23 /pmc/articles/PMC5382306/ /pubmed/28424734 http://dx.doi.org/10.1155/2017/2078526 Text en Copyright © 2017 Bruna Salamoni Sinhori et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Salamoni Sinhori, Bruna
de Andrada, Mauro Amaral Caldeira
Carpena Lopes, Guilherme
Monteiro Junior, Sylvio
Baratieri, Luiz Narciso
Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title_full Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title_fullStr Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title_full_unstemmed Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title_short Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns
title_sort influence of teeth preparation finishing on the adaptation of lithium disilicate crowns
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5382306/
https://www.ncbi.nlm.nih.gov/pubmed/28424734
http://dx.doi.org/10.1155/2017/2078526
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