Abstract
Purpose: To investigate the impact of high-speed sintering and artificial aging on the fracture load of three-unit zirconia fixed dental prostheses (FDPs). Materials and Methods: Three-unit FDPs manufactured from 3Y-TZP (Ceramill Zolid, Amann Girrbach) and 4Y-TZP (Ceramill Zolid HT+, Amann Girrbach;N = 128, n = 64/group) were sintered at 1,580 degrees C (high-speed sintering) or at 1,450 degrees C (control group;n = 32/subgroup). Specimens were bonded to steel abutment models using Multilink Automix (Ivoclar Vivadent), and fracture load was examined without (n = 16/subgroup) and with artificial aging (6,000 thermocycles [5 degrees C/55 degrees C] and 1,200,000 chewing cycles [50 N];n = 16/subgroup). Univariate analysis of variance, unpaired t test, and Weibull modulus were computed (P < .05). Results: Sintering protocol (P = .944), artificial aging (P = .630), and zirconia material (P= .445) did not show an influence on the fracture load of three-unit FDP5. High-speed sintering led to superior Weibull modulus results for artificially aged 4Y-TZP specimens, while all other groups showed values in the same range. Conclusion: The present study shows promising results for the novel high-speed sintering protocol, as it led to comparable fracture load and similar, or even superior, Weibull modulus results compared to the control group. The 4Y-TZP material presented fracture load results similar to the tried-and-tested 3Y-TZP. Artificial aging did not influence zirconia's resistance to fracture for either 3Y-TZP or 4Y-TZP.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Medizin |
| Themengebiete: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit |
| ISSN: | 0893-2174 |
| Sprache: | Englisch |
| Dokumenten ID: | 100460 |
| Datum der Veröffentlichung auf Open Access LMU: | 05. Jun. 2023, 15:34 |
| Letzte Änderungen: | 17. Okt. 2023, 15:04 |
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