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Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study

Purpose To evaluate the fracture resistance and fracture mode of high-translucency monolithic zirconia (HTZ) crowns and porcelain-veneered zirconia (PVZ) crowns. Material and methods A master die was scanned to design and fabricate the HTZ group (n = 10) and PVZ group (n = 10). Both groups were arti...

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Autores principales: Ezzat, Yousef, Sharka, Rayan, Rayyan, Mohammad, Al-Rafee, Mohammed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cureus 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8783637/
https://www.ncbi.nlm.nih.gov/pubmed/35103202
http://dx.doi.org/10.7759/cureus.20640
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author Ezzat, Yousef
Sharka, Rayan
Rayyan, Mohammad
Al-Rafee, Mohammed
author_facet Ezzat, Yousef
Sharka, Rayan
Rayyan, Mohammad
Al-Rafee, Mohammed
author_sort Ezzat, Yousef
collection PubMed
description Purpose To evaluate the fracture resistance and fracture mode of high-translucency monolithic zirconia (HTZ) crowns and porcelain-veneered zirconia (PVZ) crowns. Material and methods A master die was scanned to design and fabricate the HTZ group (n = 10) and PVZ group (n = 10). Both groups were artificially aged before loaded to fracture. The means of fracture loads of the two groups were compared using an independent t-test at a significance level of 0.05. The mode of fracture was determined using a digital magnifier. Results The mean fracture strength for the HTZ group (4,425 ± 177 newtons (N)) was significantly higher than in the PVZ group (1,798 ± 30.9 N) (p-value < 0.001). All crowns in the HTZ group presented core fracture mode. However, crowns in the PVZ group showed both a core and adhesive fracture mode of 60% and 40%, respectively. Conclusion The fracture strength of HTZ crowns is superior to PVZ crowns. The fracture strength of both types surpassed the maximum bite force in the posterior region, which may be deemed clinically adequate.
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spelling pubmed-87836372022-01-30 Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study Ezzat, Yousef Sharka, Rayan Rayyan, Mohammad Al-Rafee, Mohammed Cureus Healthcare Technology Purpose To evaluate the fracture resistance and fracture mode of high-translucency monolithic zirconia (HTZ) crowns and porcelain-veneered zirconia (PVZ) crowns. Material and methods A master die was scanned to design and fabricate the HTZ group (n = 10) and PVZ group (n = 10). Both groups were artificially aged before loaded to fracture. The means of fracture loads of the two groups were compared using an independent t-test at a significance level of 0.05. The mode of fracture was determined using a digital magnifier. Results The mean fracture strength for the HTZ group (4,425 ± 177 newtons (N)) was significantly higher than in the PVZ group (1,798 ± 30.9 N) (p-value < 0.001). All crowns in the HTZ group presented core fracture mode. However, crowns in the PVZ group showed both a core and adhesive fracture mode of 60% and 40%, respectively. Conclusion The fracture strength of HTZ crowns is superior to PVZ crowns. The fracture strength of both types surpassed the maximum bite force in the posterior region, which may be deemed clinically adequate. Cureus 2021-12-23 /pmc/articles/PMC8783637/ /pubmed/35103202 http://dx.doi.org/10.7759/cureus.20640 Text en Copyright © 2021, Ezzat et al. https://creativecommons.org/licenses/by/3.0/This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Healthcare Technology
Ezzat, Yousef
Sharka, Rayan
Rayyan, Mohammad
Al-Rafee, Mohammed
Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title_full Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title_fullStr Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title_full_unstemmed Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title_short Fracture Resistance of Monolithic High-Translucency Crowns Versus Porcelain-Veneered Zirconia Crowns After Artificial Aging: An In Vitro Study
title_sort fracture resistance of monolithic high-translucency crowns versus porcelain-veneered zirconia crowns after artificial aging: an in vitro study
topic Healthcare Technology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8783637/
https://www.ncbi.nlm.nih.gov/pubmed/35103202
http://dx.doi.org/10.7759/cureus.20640
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