Buscar
Mostrando ítems 1-10 de 181
Effects of surface treatments on Y-TZP phase stability, microstructure and osteoblast cell response
(Elsevier, 2015-12)
The effects of hydrothermal and phosphoric acid treatments on the tetragonal ZrO2 stability and surface microstructure were determined for 3mol% yttria- partially stabilized zirconia (Y-TZP) and Al2O3 doped Y-TZP (Y-TZPA). ...
Deposition of SiOx Thin Films on Y-TZP by Reactive Magnetron Sputtering: Influence of Plasma Parameters on the Adhesion Properties Between Y-TZP and Resin Cement for Application in Dental Prosthesis
(Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials, 2011-04-01)
In this paper SiOx thin films were deposited on Y-TZP ceramics by reactive magnetron sputtering technique in order to improve the adhesion properties between Y-TZP and resin cement for applications in dental prosthesis. ...
Bonding of Y-TZP to Dentin: Effects of Y-TZP Surface Conditioning, Resin Cement Type, and Aging
(Operative Dentistry Inc, 2014-05-01)
Purpose: To evaluate the effects of two surface treatments, aging, and two resin cements on shear bond strength between dentin and yttrium-stabilized tetragonal zirconia polycrystal ceramic (Y-TZP).Materials and Methods: ...
Surface roughness and bond strength between Y-TZP and self-adhesive resin cement after air particle abrasion protocols
(2016-09-01)
The aim of this study was to evaluate the influence of different air particle abrasion (APA) protocols - with variations in particle types, duration of application, and the distance between the device tip and the ceramic ...
Pre-sintered Y-TZP sandblasting: effect on surface roughness, phase transformation, and Y-TZP/veneer bond strength
(Univ Sao Paulo Fac Odontologia Bauru, 2017-11-01)
Sandblasting is a common method to try to improve the Y-TZP/veneer bond strength of dental prostheses, however, it may put stress on zirconia surfaces and could accelerate the t -> m phase transformation. Y-TZP sandblasting ...
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics
(2019-06-01)
In this work, the influence of milling strategy and cutter wear on the flexural strength of sintered Y-TZP ceramics machined in a CAD-CAM system, was investigated. Pre-sintered Y-TZP blocks were machined with tungsten ...
Improved adhesion of Y-TZP ceramics: A novel approach for surface modification
(2014-01-01)
The aim of this study was to evaluate the effect of novel surface treatments of Y-TZP ceramics on initial shear bond strengths to resin cement. Seventy-two samples (7 × 6 × 5 mm) were randomly divided into 6 groups (n = ...
FEA and microstructure characterization of a one-piece Y-TZP abutment
(Elsevier B.V., 2014-11-01)
Objectives. The most important drawback of dental implant/abutment assemblies is the need for a fixing screw. This study aimed to develop an esthetic one-piece Y-TZP abutment to suppress the use of the screw.Methods. ...
Reliability and Failure Modes of Implant-Supported Y-TZP and MCR Three-Unit Bridges
(WILEY-BLACKWELL, 2010)
Purpose: Chipping within veneering porcelain has resulted in high clinical failure rates for implant-supported zirconia (yttria-tetragonal zirconia polycrystals [Y-TZP]) bridges. This study evaluated the reliability and ...
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses
(2021-01-01)
PURPOSE. To characterize the microstructure of three yttria partially stabilized zirconia ceramics and to compare their hardness, indentation fracture resistance (IFR), biaxial flexural strength (BFS), and fatigue flexural ...