الفهرس 
ABSTRACTOnly 14 pages are availabe for public view
 |  | from | 198 |  |  |
| | | from | 198 | | |
Abstract
Aim: Clinical evaluation for color change of discolored teeth treated by bleaching vs laminate veneers.
Methodology: Patient with discolored anterior teeth were divided into two groups. Group1: treated by laminate veneers restoration (monolithic IPS e.max), while group 2: treated by bleaching (hydrogen peroxide) in the same patient. Anterior teeth of one arch were prepared with butt joint design to receive laminate veneer restorations which constructed from IPS e.max and cemented by self-adhesive resin cement, while anterior teeth of the other arch was treated by 40% hydrogen peroxide bleaching agent material. Using spectrophotometer (Easy Shade) and digital photography with Photoshop software ,the color change (ΔE) and color stability assessment were carried out and repeated four times (after one week, four weeks, two months and three months) respectively, The results were calculated and analyzed using Kolmogorov-Smirnov and Shapiro-Wilk tests.
Results: Result obtained by spectrophotometer revealed that the first color change shown was after three months follow up , where, higher statistically significant difference in (ΔE) were displayed from data obtained from bleaching teeth . While first color change (ΔE) with higher statistically significant difference displayed from data obtained by digital photography was after 4 weeks follow up of bleaching teeth also .
Conclusions: Both treatment modalities in this study, IPS e.max press laminate veneers restoration made in anterior teeth of one arch, and bleaching of the anterior teeth of the other arch, revealed acceptable clinical performance in terms of color stability.