Leyla Basir1, Razieh Meshki2, Mahsa Atiyeh Heydari3*
Background and objective: Stainless steel crowns is the most effective and durable restoration for Primary molar tooth under treatment. Being allergic to Nickel, as one of the main elements in these crowns, is prevalent. The aim of this study was to investigate the release of Nickel in three trademarks existing in Iran and assess the trimming effect and making crowns open face.
Methods and Materials: this experimental study was done on 18 crowns in three groups as A: 3M , B: MIB and C: DNTO which every group includes three subgroups of intact, trimmed and open face floating in 5 ml of artificial saliva.
The level of released Nickel from 18 crowns of three trademarks with three different modes was evaluated within two times (one day and seven days) by Atomic absorption spectrophotometry. In order to analyze the data, SPSS20 was used.
To test the hypotheses of this study, Descriptive and inferential statistical tests such as Mean comparison, Factorial analysis of variance and correlation coefficient were used. The results with 95% confidence level were reported.
Results: The concentration of released Nickel reduced from the first day to the seventh day, respectively (P<0.05) and the reduction rate in three groups was significant. The concentration of released Nickel from three different trademarks was not significant, in comparison to one another. The concentration of released Nickel from three different modes was not significant, in comparison to one another.
Conclusion: Different trademarks and different modes of crowns do not effect on releasing Nickel but they are effective on the level of releasing.
