The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System

Background: This study compared the influence of three different radial spacers (60,90,120 microns) on the marginal gap adaptation by using computer-aided manufacturing (CAD-CAM) for producing monolithic zirconia reinforced lithium silicate (ZLS) ceramic crowns. Methods: A total of 45 abutment acryl...

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Autores principales:	Gil Ben-Izhack, Asaf Shely, Sarit Naishlos, Ari Glikman, Liad Frishman, Avi Meirowitz, Eran Dolev
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CAD-CAM radial spacer digital spacer ZLS marginal fit marginal gap Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/a372fdcef37245df814f061933647992
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spelling	oai:doaj.org-article:a372fdcef37245df814f0619336479922021-11-25T16:35:53ZThe Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System10.3390/app1122107092076-3417https://doaj.org/article/a372fdcef37245df814f0619336479922021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10709https://doaj.org/toc/2076-3417Background: This study compared the influence of three different radial spacers (60,90,120 microns) on the marginal gap adaptation by using computer-aided manufacturing (CAD-CAM) for producing monolithic zirconia reinforced lithium silicate (ZLS) ceramic crowns. Methods: A total of 45 abutment acrylic teeth were divided into three groups of different radial spacers (60, 90, and 120 microns). In each group 15 teeth were scanned by Omnicam intra oral scanner and ZLS crowns were ground. For each unit the marginal gap was evaluated at four regions of interest by scanning electronic microscope (SEM). To compare the marginal gap between the three groups a one-way ANOVA with post-hoc Bonferroni test was preformed (α = 0.05). Results: The marginal gap for a 60 microns (162.99 ± 16.25 µm) radial spacer was found significantly higher than 90 (41.85 ± 3.57 µm) and 120 (41.85 ± 5.3 µm) microns radial spacers (<i>p</i> < 0.05). Between 90- and 120-micron radial spacers no difference was obtained. (<i>p</i> < 0.05). Conclusions: A radial spacer of 60 microns showed a significantly higher marginal gap compared to 90 and 120 microns and was not clinically accepted (>120 microns). For both 90 and 120 microns the marginal gap was clinically accepted (<120 microns) with no difference between the groups. The radial spacer which should be optimum for CELTRA<sup>®</sup> DUO crowns is 90 microns.Gil Ben-IzhackAsaf ShelySarit NaishlosAri GlikmanLiad FrishmanAvi MeirowitzEran DolevMDPI AGarticleCAD-CAMradial spacerdigital spacerZLSmarginal fitmarginal gapTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10709, p 10709 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CAD-CAM radial spacer digital spacer ZLS marginal fit marginal gap Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	CAD-CAM radial spacer digital spacer ZLS marginal fit marginal gap Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Gil Ben-Izhack Asaf Shely Sarit Naishlos Ari Glikman Liad Frishman Avi Meirowitz Eran Dolev The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
description	Background: This study compared the influence of three different radial spacers (60,90,120 microns) on the marginal gap adaptation by using computer-aided manufacturing (CAD-CAM) for producing monolithic zirconia reinforced lithium silicate (ZLS) ceramic crowns. Methods: A total of 45 abutment acrylic teeth were divided into three groups of different radial spacers (60, 90, and 120 microns). In each group 15 teeth were scanned by Omnicam intra oral scanner and ZLS crowns were ground. For each unit the marginal gap was evaluated at four regions of interest by scanning electronic microscope (SEM). To compare the marginal gap between the three groups a one-way ANOVA with post-hoc Bonferroni test was preformed (α = 0.05). Results: The marginal gap for a 60 microns (162.99 ± 16.25 µm) radial spacer was found significantly higher than 90 (41.85 ± 3.57 µm) and 120 (41.85 ± 5.3 µm) microns radial spacers (<i>p</i> < 0.05). Between 90- and 120-micron radial spacers no difference was obtained. (<i>p</i> < 0.05). Conclusions: A radial spacer of 60 microns showed a significantly higher marginal gap compared to 90 and 120 microns and was not clinically accepted (>120 microns). For both 90 and 120 microns the marginal gap was clinically accepted (<120 microns) with no difference between the groups. The radial spacer which should be optimum for CELTRA<sup>®</sup> DUO crowns is 90 microns.
format	article
author	Gil Ben-Izhack Asaf Shely Sarit Naishlos Ari Glikman Liad Frishman Avi Meirowitz Eran Dolev
author_facet	Gil Ben-Izhack Asaf Shely Sarit Naishlos Ari Glikman Liad Frishman Avi Meirowitz Eran Dolev
author_sort	Gil Ben-Izhack
title	The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
title_short	The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
title_full	The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
title_fullStr	The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
title_full_unstemmed	The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System
title_sort	influence of three different digital cement spacers on the marginal gap adaptation of zirconia-reinforced lithium silicate crowns fabricated by cad-cam system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a372fdcef37245df814f061933647992
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The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System

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