查看文章

Objective: To investigate the toxicity of fluoride corrosion extracts of stainless steel (SS) and nickel-titanium (NiTi) wires on a human osteosarcoma cell line (U2OS).

Materials and Methods: The SS and NiTi wires were corroded by an electrochemical method with the application of three kinds of electrolytes: 0.2% pH 3.5 acidulated phosphate fluoride (NaF) in artificial saliva, and pH 4 and pH 6.75 artificial saliva solutions. The extracts were analyzed for nickel, chromium, and titanium ions by the atomic absorption method. The extracts were diluted with medium to different concentrations (1, 0.1, and 0.01 μL/mL). The cell survival rate was determined by the ability of test cells to cleave the tetrazolium salt to form a formazan dye.

Results: The results were compared using one-way analysis of variance. Differences between the treatment means were analyzed using a Student-Newman …