Despite the increasing utilization of all-ceramic crown systems, their mechanical performance relative to that of metal ceramic restorations (MCR) has yet to be determined. This investigation tested the hypothesis that MCR present higher reliability over two Y-TZP all-ceramic crown systems under mouth-motion fatigue conditions. A CAD-based tooth preparation with the average dimensions of a mand...

PURPOSE The purpose of this study was to evaluate the effect of nano-structured alumina surface coating on shear bond strength between Y-TZP ceramic and various dual-cured resin cements. MATERIALS AND METHODS A total of 90 disk-shaped zirconia specimens (HASS CO., Gangneung, Korea) were divided into three groups by surface treatment method: (1) airborne particle abrasion, (2) tribochemicalsil...

The purpose of this study was to evaluate the effect of design and surface finishing on fracture strength of yttria-tetragonal zirconia polycrystal (Y-TZP) crowns in monolithic (1.5 mm thickness) and bilayer (0.8 mm zirconia coping and 0.7 mm porcelain veneer) configuration after artificial aging. Bovine incisors received crown preparation and Y-TZP crowns were manufactured using CAD/CAM techni...

The improvement of high temperature materials with lower heat transfer coefficients lead to the development thermal barrier coatings (TBCs). One most widely used for is Y2O3 stabilized ZrO2 (Y-TZP) because its excellent shock resistance, low conductivity, and relatively coefficient expansion. aim this work study TBCs mechanical behavior addition SiC into suspension Y-TZP/Al2O3 by acoustic emiss...

     Bioinert ceramics, like alumina and zirconia are used mainly for replacements of bones, hip joints and for dental implants. Partially stabilized zirconia ceramics (PSZ or TZP with 3 mol.% or 5 wt.% Y2O3), appear as perspective bioinert ceramics because of their high strength and corrosion resistance. In order to fabricate complex shapes, it is essential to use a near ...

for vectors x, y ∈ rn, it is said that x is left matrix majorizedby y if for some row stochastic matrix r; x = ry. the relationx ∼` y, is defined as follows: x ∼` y if and only if x is leftmatrix majorized by y and y is left matrix majorized by x. alinear operator t : rp → rn is said to be a linear preserver ofa given relation ≺ if x ≺ y on rp implies that t x ≺ ty onrn. the linear preservers o...

El calor puede ser una fuente de mejora la fuerza unión (FU) los agentes enlace entre zirconia y un cemento resinoso. Objetivo: Medir FU adhesivos utilizados para cementar zirconia, cuando han sido calentados a 75 1000 C. Materiales Métodos: tres acoplamiento disponibles comercialmente, Single Bond Universal (3M), Monobond-N (Ivoclar Vivadent) Clearfil Ceramic Primer (Kuraray America Inc). Se c...

Background: Modern zirconia blanks for the fabrication of dental CAD/CAM restorations provide a layer structure with color and strength transitions. Variation in yttria content has particular effect on characteristics materials. The properties may vary depending milling position within blank. Especially wide-span fixed partial dentures (FPDs), relevant effects clinical performance might result....

The authors evaluate the human safety, tolerability, pharmacokinetics, and pharmacodynamics of TZP-101, an agonist of the hGHS-R1a (ghrelin) receptor. Healthy subjects were randomized to either single-dose TZP-101 (20-600 microg/kg) or placebo by 30-minute intravenous infusion. Subjects underwent continuous cardiac monitoring, 12-lead electrocardiograms, and assessment for orthostatic hypotensi...