Microstructure, composition, and flexural strength of different layers within zirconia materials with strength gradient.
3Y-TZP
4Y-TZP
5Y-TZP
Flexural strength
Multilayer
SEM
X-ray diffraction
XRD
Zirconia
Journal
Dental materials : official publication of the Academy of Dental Materials
ISSN: 1879-0097
Titre abrégé: Dent Mater
Pays: England
ID NLM: 8508040
Informations de publication
Date de publication:
05 2023
05 2023
Historique:
received:
15
09
2022
revised:
01
02
2023
accepted:
03
03
2023
medline:
1
5
2023
pubmed:
13
3
2023
entrez:
12
3
2023
Statut:
ppublish
Résumé
The aim of this study was to compare composition, microstructure, and mechanical strength of current multilayer zirconia blanks. Bar shaped specimens were made from several layers of multilayer zirconia blanks (Cercon ht ML, Dentsply Sirona, US; Katana Zirconia YML, Kuraray, J;SHOFU Disk ZR Lucent Supra, Shofu, J; priti multidisc ZrO Mean flexural strength varied between 467.5 ± 97.5 MPa (top layer, IPS e.max ZirCAD Prime) and 898.0 ± 188.5 MPa (bottom layer, Cercon ht ML) with significant (p ≤ 0.055) differences between the individual layers. XRD indicated 5Y-TZP for enamel-layers, 3Y-TZP for dentine-layers, individual mixtures of 3Y-TZP, 4Y-TZP, or 5 Y-TZP for intermediate layers. SEM analysis showed grain sizes between approx. 0.15 and 4 µm. Grain size tended to decrease from top to bottom layers. The investigated blanks differ predominantly in the intermediate layers. In addition to dimensioning of restorations, the milling position in the blanks must also be taken into account when using multilayer zirconia as restorative material.
Identifiants
pubmed: 36907821
pii: S0109-5641(23)00065-9
doi: 10.1016/j.dental.2023.03.012
pii:
doi:
Substances chimiques
zirconium oxide
S38N85C5G0
Yttrium
58784XQC3Y
Dental Materials
0
Zirconium
C6V6S92N3C
Types de publication
Journal Article
Langues
eng
Pagination
463-468Informations de copyright
Copyright © 2023 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.