Raluca Monica Comaneanu, Iulia Diana Hancu, Costin Coman, Violeta Hancu, Horia Mihail Barbu, Cosmin Mihai Cotrut, Mihaela Cernusca Mitariu, Marius Maris<br>Comparative Study on the Corrosion of Ni-Cr and Co-Cr Alloys <br>in the Presence of Ti6Al4V Implant Abutments<br>

Raluca Monica Comaneanu, Iulia Diana Hancu, Costin Coman, Violeta Hancu, Horia Mihail Barbu, Cosmin Mihai Cotrut, Mihaela Cernusca Mitariu, Marius Maris
Comparative Study on the Corrosion of Ni-Cr and Co-Cr Alloys
in the Presence of Ti6Al4V Implant Abutments

Abstract:

Biocompatibility means that the materials of which fixed dental prostheses and implants are made of, should not irritate the surrounding structures, must not lead to the appearance of a inflammatory response or to a allergic reaction of the organism and may not release toxic ions. In the first part of the study we experimentally submitted a titanium implant abutment and three types of dental alloys (two NiCr alloys and one CoCr alloy) to a corrosion process, in similar conditions to the ones in the oral cavity (temperature: 37 ± 0,5°C ; pH values: 5.2 and 7), simulating the situation in which there is one single alloy in the oral cavity at a time. Then, we analysed the corrosion for galvanic couples made of titanium abutment - CoCr alloy and titanium abutment - NiCr alloy. According to the conducted tests, regardless of the pH value to which they have been realised, the NiCr alloys showed a better resistance to corrosion in the absence of the titanium alloy, while the CoCr alloy behaved better to corrosion in the presence of the titanium alloy. Key words: biocompatibility, dental alloys, corossion

Issue: 2016, Volume 67, Issue 10

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