الفهرس 
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Abstract
The aim of this study was to evaluate the optical properties, morphological changes, chemical microanalysis and SEM of two ceramic materials immersed in aqueous solutions.
The aqueous solutions were:
1-Artificial saliva.
2- Acidic media (4% acetic acid).
3-Alkaline media (alkaline water).
The two groups of ceramic materials were:
1. Emax Ceram.
2. Lava Ultimate ceramic.