Metal Ion Release from Titanium and Cobalt-Based Alloy for Dental Application (original) (raw)

Abstract

The metal ion release from the implant material occurs as a direct consequence of the corrosion process. Corrosion rate depends on the material microstructure and surface roughness, as well as on composition, temperature and pH of the chemical environment. The aim of this study was to determine the type and the amount of released metal ions from Co-based alloy (Wironit® extrahard, Bego, Germany) and commercially pure (CP) Ti (grade 2). Disk-shaped samples of commercial Co-based alloy and CP Ti (8.0 mm in diameter and 3.2 mm in thickness) were immersed in artificial saliva with different pH (4.0; 5.5 and 7.5) and incubated at 37 ºC using a thermostat. The type and amount of ions released from the metallic implant materials were determined after 1, 3 and 6 weeks of immersion using Inductively Coupled Plasma - Mass Spectrometer (Agilent ICP-MS 7500ce). The results of the study show that the amount of released metal ions is increased with the decrease of the artificial saliva pH value. ...

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