Abstrato

An in vitro comparative evaluation of color stability of two hybrid composites in liquids ingested by children: A Spectrophotometric study

Datta Meghe

The objective of this study is to evaluate and compare the colour stability of two hybrid composite restorative materials after immersion in five commonly used liquids ingested by children by using a Spectrophotometer. Discs after fabrication were placed in water and subjected to incubation for 24 hrs. Samples were randomly divided into 5 groups for each immersion media. Composite discs were numbered accordingly. Methods: 100 composite discs, 50 each of nanohybrid and microhybrid of were prepared and then light cured for 40 seconds and were then subjected to incubation for 24 hours. The pre immersion values were taken following which the samples were immersed in five different medias (mineral water, tea, Mirinda, pomegranate juice and iron syrup) three times a day for 15 minutes for 28 days. The color stability was noted at 7th, 14th, 21st and 28th days respectively by using spectrophotometer. Results: Statistical analysis was done using Mann Whitney U Test and Friedman’s Test after obtaining the readings for 28 days. Interpretation and Conclusion: Iron syrup caused the highest staining among the five media and Nano hybrid composite appeared to be more resistant to staining than micro hybrid composite.