Previous research has shown an increase in chromosomal aberrations in patients with worn implants. The type of aberration depended on the type of metal alloy in the prosthesis. We have investigated the metal-specific difference in the level of DNA damage (DNA stand breaks and alkali labile sites) induced by culturing human fibroblasts in synovial fluid retrieved at revision arthroplasty. All si...

BACKGROUND Failed hip prostheses can cause elevated circulating cobalt and chromium levels, with rare reports of fatal systemic organ deposition, including cobalt cardiomyopathy. Although blood cobalt and chromium levels are easily measured, organ deposition is difficult to detect without invasive biopsy. The T2* magnetic resonance (MR) method is used to quantify tissue iron deposition, and pla...

Background and Aim: High chipping rates of the veneering porcelain in zirconia ce-ramic restorations have been reported in many clinical studies. However, information on the bonding behavior of veneering porcelain to zirconia and lithium disilicate frameworks is limited. The purpose of this study was to evaluate the bond-ing strength of porcelain veneering to zirconia, lithium disilicate, nicke...

PURPOSE The purpose of this study was to evaluate the efficacy of two different metal conditioners for non-precious metal alloys for the bonding of porcelain to a cobalt-chromium (Co-Cr) alloy. MATERIALS AND METHODS Disk-shaped specimens (2.5×10.0 mm) were cast with Co-Cr alloy and used as adherend materials. The bonding surfaces were polished with a 600-grid silicon carbide paper and airborn...

In earlier inhalation exposures of rabbits, nickel increased the production of surfactant by type II cells, with secondary effects on morphology and function of alveolar macrophages. Cobalt induced mainly a nodular growth pattern of the type II cells. Trivalent chromium seemed to impair the capacity of macrophages to catabolize surfactant but did not affect the type II cells. We exposed rabbits...

Since 1930, partial denture frameworks have been made from metallic alloys like cobalt-chromium [Co-Cr] and resin polymers such as Polymethylmethacrylate [PMMA]. However, the main limitation of these materials over last 15 years has related to aesthetics. The show a clasp not widely accepted. objectives this study are:- 1) To find material for removable dentures that aesthetic clasps 2) compare...

BACKGROUND Recasting the base metal alloys is done as a routine procedure in the dental laboratories whenever there is casting failure or to decrease the unit cost of a fixed partial denture. However, this procedure may affect the metal ceramic bond. Furthermore, it is unclear, as to which test closely predicts the bond strength of metal-ceramic interface. The aim was to compare the bond streng...

I t has been reportedthat trivalent chromium plays an important role in insulin action. We have shown that, in the presence of trivalent chromium, insulin stimulated the glucose utilization of isolated rat lenses. This finding suggested the possibility that a variation in dietary chromium might be responsible for the repeated inconsistency in the insulin effect observed on the glucose utilizati...

Abstract In the present paper, a three-dimensional finite element model of Charnley implant has been developed to analyze stress–strain distribution and deformation over stem prosthesis. Patient-specific dynamic forces have considered for analytical evaluation using commercial code. The impact each activity analyzed separately six different biocompatible alloy materials made titanium cobalt-chr...