Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia
New monolithic multi-layered zirconia restorations are gaining popularity due to their excellent aesthetic properties. However, current knowledge of these newest multi-layer ceramics in terms of mechanical properties is scarce. Three monolithic, multi-layered zirconia materials (Katana, Kuraray Nori...
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MDPI AG
2022-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/276 |
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| author | Maria Bruhnke Yasmin Awwad Wolf-Dieter Müller Florian Beuer Franziska Schmidt |
| author_facet | Maria Bruhnke Yasmin Awwad Wolf-Dieter Müller Florian Beuer Franziska Schmidt |
| author_sort | Maria Bruhnke |
| collection | DOAJ |
| description | New monolithic multi-layered zirconia restorations are gaining popularity due to their excellent aesthetic properties. However, current knowledge of these newest multi-layer ceramics in terms of mechanical properties is scarce. Three monolithic, multi-layered zirconia materials (Katana, Kuraray Noritake, Japan) were selected for comparison: High Translucent Multi-layered zirconia (HTML), Super Translucent Multi-layered zirconia (STML) and Ultra Translucent Multi-layered zirconia (UTML). Fifteen specimens per group were cut from pre-sintered blocs in each of the four layers (L1, L2, L3, L4) and in different thicknesses (0.4 mm, 0.8 mm and 1.2 mm). Critical fracture load (<i>Fcf</i>) was recorded in 3-point-bending. Flexural strength (<i>σ</i>) in MPa, Vickers hardness (<i>HV</i>) in N/mm<sup>2</sup>, fracture toughness (<i>K<sub>Ic</sub></i>) in MPa*m1/2, Weibull Modulus (<i>m</i>) and characteristic Weibull strength (<i>σw</i>) in MPa were assessed. Statistical analysis was performed using ANOVA analysis. <i>FS</i> and <i>K<sub>Ic</sub></i> were significantly higher (<i>p</i> < 0.05) for Katana™ HTML (652.85 ± 143.76–887.64 ± 118.95/4.25 ± 0.43–5.01 ± 0.81) in comparison to Katana™ STML (280.17 ± 83.41–435.95 ± 73.58/3.06 ± 0.27–3.84 ± 0.47) and UTML (258.25 ± 109.98–331.26 ± 56.86/2.35 ± 0.31–2.94 ± 0.33), with no significant differences between layers and layer thicknesses. The range of indications should be carefully considered when selecting the type of monolithic zirconia for fabrication of dental restorations, as materials widely differ in mechanical properties. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:56:15Z |
| publishDate | 2022-12-01 |
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| spelling | doaj.art-b953144503c743e1a09e88a095e953702023-11-16T15:49:25ZengMDPI AGMaterials1996-19442022-12-0116127610.3390/ma16010276Mechanical Properties of New Generations of Monolithic, Multi-Layered ZirconiaMaria Bruhnke0Yasmin Awwad1Wolf-Dieter Müller2Florian Beuer3Franziska Schmidt4Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité—Univeritätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt—Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Straße 4-6, 14197 Berlin, GermanyDepartment of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité—Univeritätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt—Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Straße 4-6, 14197 Berlin, GermanyDepartment of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité—Univeritätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt—Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Straße 4-6, 14197 Berlin, GermanyDepartment of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité—Univeritätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt—Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Straße 4-6, 14197 Berlin, GermanyDepartment of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité—Univeritätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt—Universität zu Berlin and Berlin Institute of Health, Aßmannshauser Straße 4-6, 14197 Berlin, GermanyNew monolithic multi-layered zirconia restorations are gaining popularity due to their excellent aesthetic properties. However, current knowledge of these newest multi-layer ceramics in terms of mechanical properties is scarce. Three monolithic, multi-layered zirconia materials (Katana, Kuraray Noritake, Japan) were selected for comparison: High Translucent Multi-layered zirconia (HTML), Super Translucent Multi-layered zirconia (STML) and Ultra Translucent Multi-layered zirconia (UTML). Fifteen specimens per group were cut from pre-sintered blocs in each of the four layers (L1, L2, L3, L4) and in different thicknesses (0.4 mm, 0.8 mm and 1.2 mm). Critical fracture load (<i>Fcf</i>) was recorded in 3-point-bending. Flexural strength (<i>σ</i>) in MPa, Vickers hardness (<i>HV</i>) in N/mm<sup>2</sup>, fracture toughness (<i>K<sub>Ic</sub></i>) in MPa*m1/2, Weibull Modulus (<i>m</i>) and characteristic Weibull strength (<i>σw</i>) in MPa were assessed. Statistical analysis was performed using ANOVA analysis. <i>FS</i> and <i>K<sub>Ic</sub></i> were significantly higher (<i>p</i> < 0.05) for Katana™ HTML (652.85 ± 143.76–887.64 ± 118.95/4.25 ± 0.43–5.01 ± 0.81) in comparison to Katana™ STML (280.17 ± 83.41–435.95 ± 73.58/3.06 ± 0.27–3.84 ± 0.47) and UTML (258.25 ± 109.98–331.26 ± 56.86/2.35 ± 0.31–2.94 ± 0.33), with no significant differences between layers and layer thicknesses. The range of indications should be carefully considered when selecting the type of monolithic zirconia for fabrication of dental restorations, as materials widely differ in mechanical properties.https://www.mdpi.com/1996-1944/16/1/276zirconiamechanical propertiesmulti-layer materialsmonolithic ceramicdental ceramic |
| spellingShingle | Maria Bruhnke Yasmin Awwad Wolf-Dieter Müller Florian Beuer Franziska Schmidt Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia Materials zirconia mechanical properties multi-layer materials monolithic ceramic dental ceramic |
| title | Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia |
| title_full | Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia |
| title_fullStr | Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia |
| title_full_unstemmed | Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia |
| title_short | Mechanical Properties of New Generations of Monolithic, Multi-Layered Zirconia |
| title_sort | mechanical properties of new generations of monolithic multi layered zirconia |
| topic | zirconia mechanical properties multi-layer materials monolithic ceramic dental ceramic |
| url | https://www.mdpi.com/1996-1944/16/1/276 |
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