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Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials
The aim of this work was to evaluate the influence of specimen preparation and test method on the flexural strength results of monolithic zirconia. Different monolithic zirconia materials (Ceramill Zolid (Amann Girrbach, Koblach, Austria), Zenostar ZrTranslucent (Wieland Dental, Pforzheim, Germany),...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456702/ https://www.ncbi.nlm.nih.gov/pubmed/28773307 http://dx.doi.org/10.3390/ma9030180 |
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author | Schatz, Christine Strickstrock, Monika Roos, Malgorzata Edelhoff, Daniel Eichberger, Marlis Zylla, Isabella-Maria Stawarczyk, Bogna |
author_facet | Schatz, Christine Strickstrock, Monika Roos, Malgorzata Edelhoff, Daniel Eichberger, Marlis Zylla, Isabella-Maria Stawarczyk, Bogna |
author_sort | Schatz, Christine |
collection | PubMed |
description | The aim of this work was to evaluate the influence of specimen preparation and test method on the flexural strength results of monolithic zirconia. Different monolithic zirconia materials (Ceramill Zolid (Amann Girrbach, Koblach, Austria), Zenostar ZrTranslucent (Wieland Dental, Pforzheim, Germany), and DD Bio zx(2) (Dental Direkt, Spenge, Germany)) were tested with three different methods: 3-point, 4-point, and biaxial flexural strength. Additionally, different specimen preparation methods were applied: either dry polishing before sintering or wet polishing after sintering. Each subgroup included 40 specimens. The surface roughness was assessed using scanning electron microscopy (SEM) and a profilometer whereas monoclinic phase transformation was investigated with X-ray diffraction. The data were analyzed using a three-way Analysis of Variance (ANOVA) with respect to the three factors: zirconia, specimen preparation, and test method. One-way ANOVA was conducted for the test method and zirconia factors within the combination of two other factors. A 2-parameter Weibull distribution assumption was applied to analyze the reliability under different testing conditions. In general, values measured using the 4-point test method presented the lowest flexural strength values. The flexural strength findings can be grouped in the following order: 4-point < 3-point < biaxial. Specimens prepared after sintering showed significantly higher flexural strength values than prepared before sintering. The Weibull moduli ranged from 5.1 to 16.5. Specimens polished before sintering showed higher surface roughness values than specimens polished after sintering. In contrast, no strong impact of the polishing procedures on the monoclinic surface layer was observed. No impact of zirconia material on flexural strength was found. The test method and the preparation method significantly influenced the flexural strength values. |
format | Online Article Text |
id | pubmed-5456702 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54567022017-07-28 Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials Schatz, Christine Strickstrock, Monika Roos, Malgorzata Edelhoff, Daniel Eichberger, Marlis Zylla, Isabella-Maria Stawarczyk, Bogna Materials (Basel) Article The aim of this work was to evaluate the influence of specimen preparation and test method on the flexural strength results of monolithic zirconia. Different monolithic zirconia materials (Ceramill Zolid (Amann Girrbach, Koblach, Austria), Zenostar ZrTranslucent (Wieland Dental, Pforzheim, Germany), and DD Bio zx(2) (Dental Direkt, Spenge, Germany)) were tested with three different methods: 3-point, 4-point, and biaxial flexural strength. Additionally, different specimen preparation methods were applied: either dry polishing before sintering or wet polishing after sintering. Each subgroup included 40 specimens. The surface roughness was assessed using scanning electron microscopy (SEM) and a profilometer whereas monoclinic phase transformation was investigated with X-ray diffraction. The data were analyzed using a three-way Analysis of Variance (ANOVA) with respect to the three factors: zirconia, specimen preparation, and test method. One-way ANOVA was conducted for the test method and zirconia factors within the combination of two other factors. A 2-parameter Weibull distribution assumption was applied to analyze the reliability under different testing conditions. In general, values measured using the 4-point test method presented the lowest flexural strength values. The flexural strength findings can be grouped in the following order: 4-point < 3-point < biaxial. Specimens prepared after sintering showed significantly higher flexural strength values than prepared before sintering. The Weibull moduli ranged from 5.1 to 16.5. Specimens polished before sintering showed higher surface roughness values than specimens polished after sintering. In contrast, no strong impact of the polishing procedures on the monoclinic surface layer was observed. No impact of zirconia material on flexural strength was found. The test method and the preparation method significantly influenced the flexural strength values. MDPI 2016-03-09 /pmc/articles/PMC5456702/ /pubmed/28773307 http://dx.doi.org/10.3390/ma9030180 Text en © 2016 by the authors; Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Schatz, Christine Strickstrock, Monika Roos, Malgorzata Edelhoff, Daniel Eichberger, Marlis Zylla, Isabella-Maria Stawarczyk, Bogna Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title | Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title_full | Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title_fullStr | Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title_full_unstemmed | Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title_short | Influence of Specimen Preparation and Test Methods on the Flexural Strength Results of Monolithic Zirconia Materials |
title_sort | influence of specimen preparation and test methods on the flexural strength results of monolithic zirconia materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456702/ https://www.ncbi.nlm.nih.gov/pubmed/28773307 http://dx.doi.org/10.3390/ma9030180 |
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