Opazität und Biegefestigkeit von multilayer Zirkoniumdioxid für den Einsatz in der Digitalen Zahnmedizin / vorgelegt von: Lutz Eckstein ; 1. Gutachter: Prof. Dr. Reiner Biffar, 2. Gutachter: Prof. Dr. Sven Reich ; [Betreuer*in: Prof. Dr. Bernd Kordaß, Dipl.-Math., Dr. rer. med. Sebastian Ruge, Dipl.-Ing. (FH) Alexandra Amlang]
Zirkoniumdioxid, Opazität, Biegefestigkeit, Zahnmedizin, Digitale Zahnmedizin, multilayer Zirkoniumdioxid.
In the present study the relationship between opacity and biaxial flexural strength of multilayer zirconia was examined. These material values are of great importance for the indication assessment of the materials. For the study nine zirconium dioxides and, as a comparison, a lithium disilicate were selected. A total of 690 test specimens were produced using the CAD/CAM process and a sawing microtome. After the samples were sintered, they were measured for their layer thickness. For the measurement a self-designed and three-dimensionally printed sample holder was used. The optical roughness measuring device Profilm 3D Optical Profilter (Filmetrics, San Diego, CA, USA) was used to examine the sample surface.Opacity was determined using the microtitre-plate reader Synergy HTX (BioTek Instruments, Winooski, Vermont, USA). For the used universal testing machine Z050 (Zwick/Roell, Ulm, Germany), first a test tool had to be designed and manufactured. For strength determination a biaxial bending test was carried out. The measurements were saved in form of an excel-table, checked for normal distribution and then analysed using single factor analysis of variance (ANOVA). The results show that the roughnesses of the test specimens are in the same size range thanks to the standardised production. As a result of the correlations between opacity and flexure strength of the individual materials examined in the study, it can be said that multilayer zirconium dioxides are inferior to lithium ....
| Medienart: |
E-Book |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
Greifswald: 2020 |
| Weitere Ausgaben: |
Erscheint auch als Druck-Ausgabe: Opazität und Biegefestigkeit von multilayer Zirkoniumdioxid für den Einsatz in der Digitalen Zahnmedizin |
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| Sprache: |
Deutsch |
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| Beteiligte Personen: |
Eckstein, Lutz, 1991- [VerfasserIn] |
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| Hochschulschrift: |
Dissertation, Universitätsmedizin der Universität Greifswald, 2021 |
| Links: |
Volltext [kostenfrei] |
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| BKL: | |
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| Themen: |
Biegefestigkeit |
| Anmerkungen: |
Literaturverzeichnis: Seite 50-54 |
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| Umfang: |
1 Online-Ressource (PDF-Datei: 87 Seiten, 3774 Kilobyte) ; Illustrationen (farbig), Diagramme (teilweise farbig) |
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| Weitere IDs: |
urn:nbn:de:gbv:9-opus-56516 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
1771720050 |
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| 245 | 1 | 0 | |a Opazität und Biegefestigkeit von multilayer Zirkoniumdioxid für den Einsatz in der Digitalen Zahnmedizin |c vorgelegt von: Lutz Eckstein ; 1. Gutachter: Prof. Dr. Reiner Biffar, 2. Gutachter: Prof. Dr. Sven Reich ; [Betreuer*in: Prof. Dr. Bernd Kordaß, Dipl.-Math., Dr. rer. med. Sebastian Ruge, Dipl.-Ing. (FH) Alexandra Amlang] |
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| 520 | |a In the present study the relationship between opacity and biaxial flexural strength of multilayer zirconia was examined. These material values are of great importance for the indication assessment of the materials. For the study nine zirconium dioxides and, as a comparison, a lithium disilicate were selected. A total of 690 test specimens were produced using the CAD/CAM process and a sawing microtome. After the samples were sintered, they were measured for their layer thickness. For the measurement a self-designed and three-dimensionally printed sample holder was used. The optical roughness measuring device Profilm 3D Optical Profilter (Filmetrics, San Diego, CA, USA) was used to examine the sample surface.Opacity was determined using the microtitre-plate reader Synergy HTX (BioTek Instruments, Winooski, Vermont, USA). For the used universal testing machine Z050 (Zwick/Roell, Ulm, Germany), first a test tool had to be designed and manufactured. For strength determination a biaxial bending test was carried out. The measurements were saved in form of an excel-table, checked for normal distribution and then analysed using single factor analysis of variance (ANOVA). The results show that the roughnesses of the test specimens are in the same size range thanks to the standardised production. As a result of the correlations between opacity and flexure strength of the individual materials examined in the study, it can be said that multilayer zirconium dioxides are inferior to lithium ... | ||
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