Document Type : Original Article
Post graduate student, Department of Pedodontics and Oral Health, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.
Assistant Professor of Pedodontics and Oral Health, Faculty of Dental Medicine for Girls Al-Azhar University, Cairo, Egypt.
Purpose: Estimate the release of Nickel and Chromium from two types of commercially available stainless steel crowns in artificial saliva. Materials and Methods: Twenty stainless steel crowns of fixed size (lower left E4) from two manufacturers were immersed in 10 ml of artificial saliva and stored in separate tubes in an incubator at 37°C for 21 days. The crowns were removed from each tube on every seven days, and were placed in other tubes with fresh artificial saliva. Flame Type Atomic Absorption Spectrophotometer was used to check for the release of metal ions in the solution inside each tube at the end of 1, 7, 14 and 21 days. Results : ANOVA test was used for analysis of results for the estimation of released Nickel and Chromium among the crowns . There was statistically verified difference in the release of Nickel and Chromium on different days in each of the group of SSCs tested. However, no significant difference was seen in the release of both metals among the groups. Conclusion: In all the SSCs tested, there was the release of Nickel and Chromium, but the total release of both the metals was below the critical level to cause any toxic effects, so the release of metal ions should not be an alarming concern for the use of any of the group of SSCs.