EVALUATION OF TITANIUM AND NITINOL STABILITY IN THE ORAL ENVIRONMENT

The interaction between dental alloys and saliva affects both their properties and those of metallic materials. Aim: to analyze the in vitro interaction between a series of titanium-based dental alloys and artificial saliva. Materials and Methods: Samples made of Titanium and Nitinol were studied. Corrosion under tension was chosen, and a spectrophotometer was used to record the spectra of the solutions after the electrochemical treatment of the samples. In vitro testing of the cytotoxic impact of the studied eluates was conducted through flow cytometry analysis. Results: Titanium is by far the most resistant biomaterial, exhibiting the lowest corrosion rate. The cyclic potentiodynamic curve for Nitinol indicates typical pitting corrosion. Flow cytometry shows increased percentages of live cells, very low percentages of dead cells, an almost complete disappearance of pre-apoptotic cells, and an increase in the number of apoptotic cells for both materials. Conclusions: Both materials demonstrate increased stability in the oral environment and reduced cytotoxic potential.