The purpose of this study was to compare the fracture resistance and fracture mode of single implant-zirconium coping combinations using zirconium and titanium abutments and to analyze the stress distribution pattern using three-dimensional finite elements analysis. Twenty implants with titanium and zirconium abutments were randomly divided into two groups (n = 10) and into resin blocks. Zircon...

Aim: The aim of this in vitro study was to evaluate imaging artifacts induced by Titanium, Zirconium, Titanium-Zirconium abutments in CT, MRI and CBCT imaging modalities.Methods: A 4×8mm titanium fixture was inserted in a dry human mandible. Titanium, Zirconium and Titanium–Zirconium abutments measuring 10.5 mm in height are located on the fixture, one by one. Each abutment was scan...

The structure of solid zirconium tetrachloride is known from X-ray studies[l] to consist of extended chains of distorted octahedra with two bridging chlorine atoms between adjacent zirconium atoms. Although the unit cell possesses a center of symmetry, the two pairs of bridging chlorine atoms attached to a given zirconium atom are not trans to each other. The factor group symmetry thus is C2h w...

This paper presents the wear characteristics of the composite ceramic coating made with Al2O3-40wt%8YSZ on the biomedical grade Ti-6Al-4V alloy (grade 5) used for total joint prosthetic components, with the aim of improving their tribological behavior. The coatings were deposited using a plasma spraying technique, and optimization of plasma parameters was performed using response surface method...

In the present study, an investigation into wear properties has been carried out to identify the influence of ZrO2 as the reinforcement material on the LM25 MMC composite. Aluminum LM25 is selected as the base material, and it is reinforced with varying proportions of 0, 3, 6, 9, 12 and 15% of zirconia (ZrO2) manufactured by stir casting. Six tensile test and wear test samples were prepared acc...

To cite: Gkouliopoulou E, Agathangelidis F, Vampertzis T, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2016218025 DESCRIPTION We present a case of a man aged 81 years who underwent a primary cementless total hip arthroplasty. Eight years after the index surgery, failure of the arthroplasty was revealed by the presence of the radiographic ‘cloud sign’ (fi...

Titanium (Ti) is employed as a biomaterial because of its superior biocompatibility and favorable mechanical properties that can be changed with the addition alloying elements, such zirconium molybdenum. Silver an element recognized for antibacterial action, which improve strength decrease Young’s modulus Ti. This work studies effect silver (1 3 wt%) on crystalline structure, microstructure, Vi...