Comparison of Ion Release from Cintron Alloy at Two Different PH using Atomic Absorption Spectroscopy

Abstract

Introduction: In recent years, using metal alloys has been expanding in dentistry, especially in dentures. Further research is needed on ion release in these alloys considering the potential harm to human health. Materials and Methods: A total of 20 disk-shaped samples and two acidic environments with pH of 4.2 and 6.5 were used in the present study. Half of the samples without simulation of porcelain firing and the other half after the simulation were incubated for 7 days at 37 ° C in a closed sterile centrifuge tube containing 7.5 ml of acidic solution with pH of 4.2 and 6.5. Finally, the solution was analyzed by spectroscopic method to evaluate the amount of ions released from the Cintron alloy. The results were analyzed using ANOVA by SPSS software. Results: In the samples placed in solutions with pH of 4.2 and 6.5, the amount of released ions after firing was significantly higher than that without the firing process. Furthermore, the amount of released ions in a solution with a pH of 6.5 is significantly less than that in pH of 4.2 in samples without firing simulation. However, the amount of released ions in a solution with a pH of 6.5 is significantly higher than that in pH of 4.2 in the samples after firing. Conclusion: The results demonstrate that porcelain firing changes the nature of alloys leading to the release of more chromium, cobalt, and molybdenum ions. Also, increasing the acidity of the environment before firing causes more ions to be released, while after firing, the ions are released less in a more acidic environment.

Keywords

• cintron alloy
• ion release
• spectroscopy
• ph value