The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials?
The thickness of a material has a significant impact on its fracture load. The aim of the study was to find and describe a mathematical relationship between the material thickness and the fracture load for dental all-ceramics. In total, 180 specimens were prepared from a leucite silicate ceramic (ES...
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MDPI AG
2023-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/5/1997 |
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| author | Josef Schweiger Kurt-Jürgen Erdelt Tobias Graf Thomas Sciuk Daniel Edelhoff Jan-Frederik Güth |
| author_facet | Josef Schweiger Kurt-Jürgen Erdelt Tobias Graf Thomas Sciuk Daniel Edelhoff Jan-Frederik Güth |
| author_sort | Josef Schweiger |
| collection | DOAJ |
| description | The thickness of a material has a significant impact on its fracture load. The aim of the study was to find and describe a mathematical relationship between the material thickness and the fracture load for dental all-ceramics. In total, 180 specimens were prepared from a leucite silicate ceramic (ESS), a lithium disilicate ceramic (EMX), and a 3Y-TZP zirconia ceramic (LP) in five thicknesses (0.4, 0.7, 1.0, 1.3, and 1.6 mm; n = 12). The fracture load of all specimens was determined using the biaxial bending test according to the DIN EN ISO 6872. The regression analyses for the linear, quadratic, and cubic curve characteristics of the materials were conducted, and the cubic regression curves showed the best correlation (coefficients of determination (R<sup>2</sup>): ESS R<sup>2</sup> = 0.974, EMX R<sup>2</sup> = 0.947, LP R<sup>2</sup> = 0.969) for the fracture load values as a function of the material thickness. A cubic relationship could be described for the materials investigated. Applying the cubic function and material-specific fracture-load coefficients, the respective fracture load values can be calculated for the individual material thicknesses. These results help to improve and objectify the estimation of the fracture loads of restorations, to enable a more patient- and indication-centered situation-dependent material choice. |
| first_indexed | 2024-03-11T07:18:43Z |
| format | Article |
| id | doaj.art-944cfb2951904f43afbadd99fda2e180 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T07:18:43Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-944cfb2951904f43afbadd99fda2e1802023-11-17T08:05:46ZengMDPI AGMaterials1996-19442023-02-01165199710.3390/ma16051997The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials?Josef Schweiger0Kurt-Jürgen Erdelt1Tobias Graf2Thomas Sciuk3Daniel Edelhoff4Jan-Frederik Güth5Department of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, GermanyDepartment of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, GermanyDepartment of Prosthodontics, Center for Dentistry and Oral Medicine (Carolinum), Goethe University Frankfurt, 60596 Frankfurt am Main, GermanyThomas Sciuk, Private Practice Dr Thomas Sciuk, Prinzregentenstrasse 8, 86150 Augsburg, GermanyDepartment of Prosthetic Dentistry, University Hospital, LMU Munich, 80336 Munich, GermanyDepartment of Prosthodontics, Center for Dentistry and Oral Medicine (Carolinum), Goethe University Frankfurt, 60596 Frankfurt am Main, GermanyThe thickness of a material has a significant impact on its fracture load. The aim of the study was to find and describe a mathematical relationship between the material thickness and the fracture load for dental all-ceramics. In total, 180 specimens were prepared from a leucite silicate ceramic (ESS), a lithium disilicate ceramic (EMX), and a 3Y-TZP zirconia ceramic (LP) in five thicknesses (0.4, 0.7, 1.0, 1.3, and 1.6 mm; n = 12). The fracture load of all specimens was determined using the biaxial bending test according to the DIN EN ISO 6872. The regression analyses for the linear, quadratic, and cubic curve characteristics of the materials were conducted, and the cubic regression curves showed the best correlation (coefficients of determination (R<sup>2</sup>): ESS R<sup>2</sup> = 0.974, EMX R<sup>2</sup> = 0.947, LP R<sup>2</sup> = 0.969) for the fracture load values as a function of the material thickness. A cubic relationship could be described for the materials investigated. Applying the cubic function and material-specific fracture-load coefficients, the respective fracture load values can be calculated for the individual material thicknesses. These results help to improve and objectify the estimation of the fracture loads of restorations, to enable a more patient- and indication-centered situation-dependent material choice.https://www.mdpi.com/1996-1944/16/5/1997all-ceramicsdigital workflow fracture load material thicknessmonolithic restorationsregression analysis |
| spellingShingle | Josef Schweiger Kurt-Jürgen Erdelt Tobias Graf Thomas Sciuk Daniel Edelhoff Jan-Frederik Güth The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? Materials all-ceramics digital workflow fracture load material thickness monolithic restorations regression analysis |
| title | The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? |
| title_full | The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? |
| title_fullStr | The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? |
| title_full_unstemmed | The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? |
| title_short | The Fracture Load as a Function of the Material Thickness: The Key to Computing the Strength of Monolithic All-Ceramic Materials? |
| title_sort | fracture load as a function of the material thickness the key to computing the strength of monolithic all ceramic materials |
| topic | all-ceramics digital workflow fracture load material thickness monolithic restorations regression analysis |
| url | https://www.mdpi.com/1996-1944/16/5/1997 |
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