Abstract: This study evaluated the vitro performance of the effect of in-office bleaching (Zoom gel material) on the color changes of
the one hundred twenty discs specimens, 5 mm in diameter and 2 mm thickness and shade color (A1).these were divided to three groups
according to material which prepared from; Beautiful II (B), ISP Empress Direct (E) and Ceram.x.mono composite resins (C), each
group's discs specimens were subdivided into four subgroups (n=10), according to the time follow up. All specimens’ discs were polished
and stored in distilled water at 37°C for one week. These specimens' discs were exposed later to four sessions of in office bleaching. The
colorimetric measurements were performed at baseline (before bleaching), 48 hours after bleaching, 3 months and 6 months after
bleaching. Data statistically analyzed. Results showed: there were significant effects on the different color parameters L*, a* and b*
according to the CIE L* a* b* color system and color change (ΔE) on the specimens of the three contemporary composite resins
materials.
تاريخ النشر
24/01/2014
الناشر
Ameer AL-Ameedee, Hala Ragab, Ziad Salameh, Essam Osman
الأستاذ المساعد الدكتور امير حمدي العميدي | Ameer Hamdi Alameedee | 2717