Abstract :
The aim of this study was to evaluate the amount of elution of BISGMA and UDMA from nanocomposites following bleaching with 15% and 35% bleaching gel over a period of 24 hours and 7 days. Filtek Z250XT (3M, ESPE;India) and IPS Empress (Ivoclar Vivadent; Schaan) were treated with an Opalescence PF15 % (Ultradent Products, Inc.; South Jordan) for 5 hours and Opalescence PF35% (Ultradent Products, Inc.; South Jordan) for 30 min. For each of the two composite resins, 10 samples were prepared and immersed in 2 ml of 99.99% ethanol (Hayman limited, Eastways Park, Witham, Essex, CM88YE, and England) and were stored at room temperature. The medium was replenished after 24 hours and 7 days. The composite blocks were measured using reverse phase High Performance Liquid Chromatography (SHIMADZU, Model SPD 20A, Shimadzu Corporation, and Kyoto, Japan.) unit. One-way ANOVA, Post hoc Test, paired ‘t’ test and student ‘t’ test were used for statistical analysis of the acquired data. The results of the study exhibited that at 24hrs, the mean value of the elution of BISGMA and UDMA from Filtek Z250XT was higher compared to that of IPS Empress (i.e. P
Keyword :
BISGMA, UDMA, Nano hybrid dental composite, High Performance Liquid Chromatography.