الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 139 |  |  |
| | | from | 139 | | |
Abstract
The aim of this study was to evaluate the effect of two different in-office bleaching agents and the topical fluoride application on color and surface roughness of Lithium disilicate glass ceramic (IPS E.max CAD) and Zirconia re-inforced lithium silicate ceramic (Vita Suprinity). Conclusion: The influence of in-office bleaching agents on color was material dependent. The changes in color and surface roughness were time dependent. Surface roughness (Ra) decreased after immediate application of in-office bleaching agent in all tested groups but increased after delayed bleaching and fluoride application in all tested groups. Fluoride application following the bleaching of the ceramic materials showed higher color and surface roughness changes than bleaching application only in all tested groups.