Abstract
Developing yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) with high strength and translucency could significantly widen the clinical indications of monolithic zirconia restorations. This study investigates the mechanical and optical properties of three Y-TZP ceramics: High-Translucency, High-Strength and High-Surface Area. The four-point bending strengths (mean±standard error) for the three Y-TZP ceramics (n=10) were 990±39, 1416±33 and 1076±32 MPa for High-Translucency, High-Strength and High-Surface Area, respectively. The fracture toughness values (mean±standard error) for the three zirconias (n=10) were 3.24±0.10, 3.63±0.12 and 3.21±0.14 MPa m1/2 for High-Translucency, High-Strength and High-Surface Area, respectively. Both strength and toughness values of High-Strength zirconia were significantly higher than High-Surface Area and High-Translucency zirconias. Translucency parameter values of High-Translucency zirconia were considerably higher than High-Strength and High-Surface Area zirconias. However, all three zirconias became essentially opaque when their thickness reached 1 mm or greater. Our findings suggest that there exists a delicate balance between mechanical and optical properties of the current commercial Y-TZP ceramics.
Original language | English (US) |
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Pages (from-to) | 1077-1085 |
Number of pages | 9 |
Journal | Ceramics International |
Volume | 42 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2016 |
Keywords
- C. Mechanical properties
- C. Optical properties
- Edge chipping
- Monolithic zirconia
- Y-TZP
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry