Results 71 to 80 of about 4,420 (220)

Effect of Implant Design on Fracture Resistance, Mode, and Crystal Structure of One‐ and Two‐Piece Zirconia Implants With Ceramic or Titanium Abutment Screws: An In Vitro Study

Clinical Oral Implants Research, EarlyView.
ABSTRACT Objectives To evaluate the fracture resistance, fracture modes, and crystalline phase changes of zirconia one‐piece implants (OPI) and bone‐level (BLTPI) or tissue‐level, two‐piece implants (TLTPI), with ceramic (C) or titanium (T) abutment screws after dynamic preloading in a moist environment.
Abdulaziz Gul, Evaggelia Papia, Siamak Eqtesadi, Magnus Anderson, Jonas P. Becktor, Per Vult von Steyern   +5 more
wiley   +1 more source

Improving fatigue resistance of translucent 4Y‐PSZ zirconia through glass gradation

European Journal of Oral Sciences, EarlyView.
Abstract To evaluate the effect of graded glass infiltration on the fatigue behavior and mechanical reliability of translucent 4Y‐PSZ zirconia before and after hydrothermal aging, disc‐shaped specimens were fabricated by uniaxial pressing and divided into control and glass‐graded groups (n = 36/group).
Felipe Machado Souza, Larissa M. M. Alves, Edisa O. Sousa, Tiago Moreira Bastos Campos, Giovana Assis Marcolino, Mariana Miranda de Toledo Piza, Rainã S. Dias, Satoshi Yamaguchi, Petra C. Gierthmuehlen, Lukasz Witek, Paulo G. Coelho, Estevam A. Bonfante, Ernesto B. Benalcazar‐Jalkh   +12 more
wiley   +1 more source

Peri‐Implant Soft Tissue Response to Monolithic Zirconia Versus Porcelain‐Fused‐to‐Metal Implant Crowns: Histological and Clinical Outcomes of an RCT

Journal of Clinical Periodontology, EarlyView.
ABSTRACT Objective To assess the peri‐implant soft‐tissue and hard‐tissue response to monolithic zirconia (ZrO2) compared to porcelain‐fused‐to‐metal implant crowns (PFMs). Methods This report constitutes a pre‐specified secondary analysis of this RCT.
Yifan Zhang, Sven Mühlemann, Aspasia Pachiou, Stephanie Astrid Stalder, Ronald E. Jung, Ye Lin, Daniel S. Thoma   +6 more
wiley   +1 more source

Effect of Cigarette Smoking on the Surface Roughness, Color, and Translucency of Zirconia Produced by Additive and Subtractive Manufacturing

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective To compare the surface roughness, color stability, and translucency of zirconia produced by additive manufacturing (AM) and subtractive manufacturing (SM) after exposure to cigarette smoking. Materials and Methods A total of 60 disc‐shaped specimens were fabricated from 2 methods: AM (INNI Cera BCM W500/1000) and SM (VITA YZ T).
Bengisu Mahmutluoglu, Nazli Aydin, Koray Soygun   +2 more
wiley   +1 more source

Microstructure and Phase Composition of Yttria-Stabilized Zirconia Nanofibers Prepared by High-Temperature Calcination of Electrospun Zirconium Acetylacetonate/Yttrium Nitrate/Polyacrylonitrile Fibers

Fibers, 2019
For the first time, dense nanofibers of yttria-stabilized tetragonal zirconia with diameter of ca. 140 nm were prepared by calcination of electrospun zirconium acetylacetonate/yttrium nitrate/polyacrylonitrile fibers at 1100−1300 °C.
Vyacheslav V. Rodaev, Svetlana S. Razlivalova, Alexander I. Tyurin, Andrey O. Zhigachev, Yuri I. Golovin   +4 more
doaj   +1 more source

Ultra‐High‐Speed Sintering of 3.5Y‐TZP Zirconia: Time Reduction Without Compromising Translucency

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To assess, firstly, the impact of three sintering speeds on translucency and grain size of 3.5Y‐TZP zirconia (Katana HT) across clinically relevant thicknesses, and secondly, the effect of thermocycling on translucency. Materials and Methods Disc specimens were fabricated at six thicknesses (0.7–2.0 mm) and sintered using SLOW (7 h),
Tatiana Roman, Hamdi Jmal, Teissir Ben Ammar , Adrien Greffet, Marc Lenertz, Olivier Etienne   +5 more
wiley   +1 more source

Effect of Glazing Dwell Time and Cooling Duration on Flexural Strength and Surface Microhardness of 3 mol% Yttria‐Stabilized Tetragonal Zirconia: An In Vitro Study

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective To evaluate the effect of glazing dwell time and cooling duration on the flexural strength and surface microhardness of high‐translucency 3 mol% yttria‐stabilized tetragonal zirconia polycrystal (3Y‐TZP). Materials and Methods Total of 108 rectangular zirconia specimens (20 × 4 × 2 mm) were fabricated from preshaded monolithic blocks
Shubha Sarmalkar, Aradhana Nagarsekar, Meena A. Aras, Umesh Y. Pai, Ridhima Gaunkar, Prajakta R. Volvaikar   +5 more
wiley   +1 more source

From zirconia to yttria: Sampling the YSZ phase diagram using sputter-deposited thin films

AIP Advances, 2016
Yttria-stabilized zirconia (YSZ) thin films with varying composition between 3 mol% and 40 mol% have been prepared by direct-current ion beam sputtering at a substrate temperature of 300 °C, with ideal transfer of the stoichiometry from the target to the
Thomas Götsch, Wolfgang Wallisch, Michael Stöger-Pollach, Bernhard Klötzer, Simon Penner   +4 more
doaj   +1 more source

Melting point of yttria [PDF]

, 1977
Fourteen samples of 99.999% Y/sub 2/O/sub 3/ were melted near the focus of a 250-W CO/sub 2/ laser. The average value of the observed melting point along the solid--liquid interface was 2462 +- 19/sup 0/C. Several of these same samples were then melted in ultrahigh-purity oxygen, nitrogen, helium, or argon, and in water vapor. No change in the observed
openaire   +2 more sources

Long‐Term Clinical and Radiographic Outcomes of Ceramic Dental Implants: An 11‐Year Retrospective Cohort Study

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective Evidence on zirconia dental implants remains limited. This retrospective study evaluated clinical and radiographic outcomes of contemporary ceramic implant systems placed in private practice with variable follow‐up of up to 11 years.
Mona Monzavi, Medis Masnavi, Ayman Zraiqat, Al Manesh   +3 more
wiley   +1 more source