Flexural Strength and Morphological Study of Different Multilayer Zirconia Dental Materials

Labetić, Andrea; Klaser, Teodoro; Skoko, Željko; Jakovac, Marko; Žic, Mark (2024) Flexural Strength and Morphological Study of Different Multilayer Zirconia Dental Materials. Materials, 17 (5). ISSN 1996-1944

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Abstract

Nowadays, yttria (Y3+)-stabilized ZrO2 (Y-TZP) is the most commonly used material in dental prosthetics. Y-TZP dental ceramics are mainly stabilized via the addition of 3 mol% yttrium oxide (Y2O3). These ceramics exhibit excellent mechanical properties, including high flexural strength, fracture toughness, elastic modulus, etc. Some manufacturers have recently introduced a new class of dental materials with multilayer composition with the aim of combining the advantages of adding more or less Y2O3 to the ceramic composition in one Y-TZP material. The flexural strength values of multilayer Y-TZP may vary depending on the dimensions of the specimen, layer distributions, and especially the layer exposed on the maximum tension side, i.e., loading configuration. Although previous studies have examined the flexural strength of separate Y-TZP layers, capturing the flexural strength of multilayer Y-TZP is still challenging. However, one should keep in mind that multilayer flexural strength is important for clinical indications. The objective of this study is to compare the flexural strength of three distinct multilayer translucent Y-TZP materials made up of layers with different Y3+ contents. Rectangular samples (2 mm × 2 mm × 16 mm) were prepared from CAD/CAM discs using the milling machine Programill PM7 (Ivoclar Vivadent AG). Milled bars were tested for flexural strength in a three-point bending test (ISO 6872:2015) using a universal testing machine (Inspekt Duo 5kN; Hegewald & Peschke, Nossen, Germany) at a crosshead speed of 0.5 mm/min. Representative samples of each type of material were selected for quantitative and qualitative analysis of the microstructure. Representative samples of each type of material were selected for structural, mechanical, and microstructural analyses.

Item Type:	Article
Uncontrolled Keywords:	multilayer zirconia; flexural strength; ZirCad Prime; Cercon ht ML; Katana ZIRCONIA YML
Subjects:	BIOMEDICINE AND HEALTHCARE > Dental Medicine
Divisions:	Division of Materials Physics
Projects:	Project title Project leader Project code Project type Centar za Napredna Istraživanja Kompleksnih Sustava-CeNIKS Mihael Srđan Grbić; Emil Tafra KK.01.1.1.02.0013 EK Otvorene znanstvene infrastrukturne platforme za inovativne primjene u gospodarstvu i društvu-O-ZIP David Matthew Smith KK.01.1.1.11.0001 EK
Depositing User:	Lorena Palameta
Date Deposited:	28 Aug 2024 11:41
URI:	http://fulir.irb.hr/id/eprint/9028
DOI:	10.3390/ma17051143

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