title: Highly-translucent, strong and aging-resistant 3Y-TZP ceramics for dental restoration by grain boundary segregation.
abstract: Latest trends in dental restorative ceramics involve the development of full-contour 3Y-TZP ceramics which can avoid chipping of veneering porcelains. Among the challenges are the low translucency and the hydrothermal stability of 3Y-TZP ceramics. In this work, different trivalent oxides (Al2O3, Sc2O3, Nd2O3 and La2O3) were selected to dope 3Y-TZP ceramics. Results show that dopant segregation was a key factor to design hydrothermally stable and high-translucent 3Y-TZP ceramics and the cation dopant radius could be used as a controlling parameter. A large trivalent dopant, oversized as compared to Zr(4+), exhibiting strong segregation at the ZrO2 grain boundary was preferred. The introduction of 0.2 mol% La2O3 in conventional 0.1-0.25 wt.% Al2O3-doped 3Y-TZP resulted in an excellent combination of high translucency and superior hydrothermal stability, while retaining excellent mechanical properties.
authors: Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg, 44, B-3001 Heverlee, Belgium. Electronic address: fei.zhang@mtm.kuleuven.be.
authors: Fei
authors: F
authors: Zhang
authors: Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg, 44, B-3001 Heverlee, Belgium.
authors: Kim
authors: K
authors: Vanmeensel
authors: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors: Maria
authors: M
authors: Batuk
authors: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors: Joke
authors: J
authors: Hadermann
authors: KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Kapucijnenvoer, 7, blok a, B-3000 Leuven, Belgium.
authors: Masanao
authors: M
authors: Inokoshi
authors: KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Kapucijnenvoer, 7, blok a, B-3000 Leuven, Belgium.
authors: Bart
authors: B
authors: Van Meerbeek
authors: KU Leuven BIOMAT, Department of Oral Health Sciences, KU Leuven & Dentistry, University Hospitals Leuven, Kapucijnenvoer, 7, blok a, B-3000 Leuven, Belgium.
authors: Ignace
authors: I
authors: Naert
authors: Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg, 44, B-3001 Heverlee, Belgium.
authors: Jef
authors: J
authors: Vleugels
mesh_terms: D002412:Cations; D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization; D003793:Dental Restoration, Permanent; D006244:Hardness; D007700:Kinetics; D007811:Lanthanum / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D013997:Time Factors; D015019:Yttrium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D002412:Cations; D010087:Oxides; C103829:lanthanum oxide; D015019:Yttrium; D007811:Lanthanum; D015040:Zirconium
keywords: Aging; Ceramic structure; Dental restorative material; Translucency; Zirconia