Abstract
The aim of this study was to evaluate and compare the fracture resistance of definitive zirconia dioxide restorations obtained using a computer-aided design and manufacturing (CAD/CAM) system. Methods: Two groups of ten samples were analyzed for each material (n: 20), the first group was Zolid Gen X Amann Girrbach (ZGX) and the second group was Cercon HT Dentsply Sirona (CDS). The restorations were designed with identical parameters and milled with a CAD/CAM system. Each specimen was load tested at a speed of 0.5 mm/min with a direction parallel to the major axis of the tooth and with an initial preload of 10N until fracture using a universal testing machine (Universal/Tensile Testing Machine, Autograph AGS-X Series) equipped with a 20 kN load cell. The results obtained were recorded in Newtons (N), using software connected to the testing machine. Results: Statistically significant differences were found, and the fracture toughness of the monolithic zirconia crowns was lower in the CDS group (1744.84 ± 172.8 N), compared to the ZGX group (2387.41 ± 516 N). Conclusions: The monolithic zirconia CAD-CAM zirconia crowns showed sufficient fracture strength to be used in posterior molar and premolar zones with either material as they withstood fracture loads greater than the maximum masticatory force.
| Translated title of the contribution | Análisis comparativo de resistencia a la fractura de dióxido de circonio monolítico translúcido fresado en un sistema Cad/cam |
|---|---|
| Original language | English |
| Pages (from-to) | 1179-1190 |
| Number of pages | 12 |
| Journal | Ceramics |
| Volume | 6 |
| Issue number | 2 |
| DOIs | |
| State | Published - 3 May 2023 |
Bibliographical note
Publisher Copyright:© 2023 by the authors.
Keywords
- CAD/CAM materials
- fracture resistance
- monolithic
- multilayer zirconia
- zirconia
CACES Knowledge Areas
- 227A Materials