Yttrium-stabilized zirconium dioxide implants made of brezirkon (whiteSKY, Bredent medical, Senden, Germany) were used for the treatment of edentulous ridge rehabilitation in the Dental Clinic of the University of Milan (Head of the Department, Prof. F. Santoro). Zirconium dioxide is a highly resistant ceramic material obtained by cleaning zirconium dioxide and zirconium silicate. The implant u...

PURPOSE The aim of this work is to evaluate different types of materials used for making implant abutments, by means of an in vitro study and a review of the literature, in order to identify the indications for a better choice of an implant-supported restoration in the anterior section. MATERIALS AND METHODS 5 implant abutments were tested in a random order in the superior anterior maxilla of...

AIMS To report the appearances of zirconium dioxide and barium sulphate in interface membranes, synovium, and other tissues around joint prostheses. METHODS Histological sections from 23 specimens were reviewed by light microscopy and polarisation. Scanning electron microscopy and x ray microanalysis were performed on routinely processed paraffin wax sections. RESULTS Polyethylene, metals, ...

zirconium dioxide, commonly known as zirconia, is an interesting material and is receiving growing attention due to its excellent mechanical properties. the solid was characterized for surface area measurements, scanningelectron microscopy (sem), energy dispersive x-ray diffractometry (edx) and potentiometric titrations. surface titrations were carried out at the temperature range 303 to 323k i...

A review of zirconium dioxide or zirconia ZrO2 is presented. The finding compounds in nature, the physical and chemical properties are given, polymorphism oxide, phase diagrams systems with its participation considered. areas application highlighted: automotive industry, electronics energy industrial ecology, equipment manufacturing mechanical engineering production zirconium-based refractories...

Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknes...

The study presents an ammonia microsensor integrated with a readout circuit on-a-chip fabricated using the commercial 0.18 μm complementary metal oxide semiconductor (CMOS) process. The integrated sensor chip consists of a heater, an ammonia sensor and a readout circuit. The ammonia sensor is constructed by a sensitive film and the interdigitated electrodes. The sensitive film is zirconium diox...

Bensheim/Salzburg, 25 February 2016. Zirconium dioxide has been successfully used in dentistry for about 20 years. The majority are restorations with zirconia frameworks and ceramic veneers. For the past six years, fully anatomical zirconium dioxide (full contour zirconia) has been increasingly used for restorations (crowns and bridges) [1] [2] [3]. The results from in vitro tests show that wit...

The reduction of the equivalent oxide thickness (EOT) of the gate oxide has emerged as one of the most difficult tasks addressing future CMOS technology. In order to overcome gate tunneling, the introduction of so-called high-κ materials will be necessary [1]. Hafnium dioxide, HfO2 [2], zirconium dioxide, ZrO2 [3], and their silicates are assumed to be the most promising candidates to fulfil th...

The refractive index of nanoparticles dispersed in water is measured, using the total internal reflection method. The critical angle is determined by the disappearance of diffraction orders from a metal grating. The investigated nanoparticles are titanium dioxide (anatase phase), (35 nm diameter), zinc oxide, (<50 nm diameter), zirconium dioxide, (<100 nm diameter). The refractive index is meas...