Metal Ions Release from Welded Co—Cr Dental Alloys

Author:

Carek Andreja1,Slokar Benić Ljerka2,Bubalo Vatroslav3

Affiliation:

1. School of Dental Medicine, University of Zagreb, 10000 Zagreb, Croatia

2. Faculty of Metallurgy, University of Zagreb, 44000 Sisak, Croatia

3. Dubrava University Hospital, 10000 Zagreb, Croatia

Abstract

Cobalt–chromium alloys (Co-Cr) are widely used in dentistry due to their excellent mechanical properties and corrosion resistance. Since prosthetic materials must be permanently stable in the oral cavity, it is very important to determine the release of ions from alloys in the oral cavity. In dentistry today, metals and alloys are mainly joined by laser and tungsten inert gas (TIG) welding. Therefore, in this work, the release of metal ions from six different Co-Cr alloys joined by these two welding methods was quantified to determine the effects of the welding method on an ion release. Static immersion tests, atomic absorption spectrometry and statistical analysis were performed for this purpose. The results showed that laser-welded alloys release a lower amount of metal ions compared to TIG-welded alloys.

Funder

University of Zagreb

Publisher

MDPI AG

Subject

General Materials Science

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