الفهرس 
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Abstract
The purpose of this study was to examine the color stability and translucency of lithium disilicate glass ceramic and high transparent monolithic zirconia ceramics, using different finishing procedures, after being exposed to a corrosive media.
A total of forty ceramic discs, each measuring 10x12mm, will be categorized into two groups, with twenty discs in each group, based on the type of ceramic material used. Each group will then be further divided into two subgroups, with ten discs in each subgroup, based on the finishing procedure. Finally, each subgroup will be divided into two classes, with five discs in each class, based on the type of test that will be conducted.
The discs were submerged in a 4% acetic acid solution to assess the impact of aging on the color stability and translucency of glazed and polished ceramic.
The samples underwent testing to assess any alterations in color and translucency, which were quantified using a spectrophotometer, both before and after corrosion. A total of 5 samples underwent testing to assess color stability, while an additional 5 samples were evaluated for translucency.
The data was collected, calculated, tabulated, and statistically examined.
The post hoc test was employed, followed by the Mann-Whitney test, to examine the mean differences throughout time.
The significance level was established at a threshold of P < 0.05. The statistical analysis was conducted using IBM® SPSS® Statistics Version 20 for Windows.
In the color stability:
There was a statistically significant disparity in ∆E values among the material groups and finishing process subgroups. However, there was no clinically significant alteration in color observed in the samples before and after aging, which is deemed clinically acceptable.
The results indicated that the color stability of HTZ was greater than that of E-max, and the color stability of the glazed samples was higher than that of the polished samples for both materials.
In the translucency parameter:
There was no statistically significant difference in TP values between the two material groups and among the subgroups of each material, except for the polished samples. Specifically, there was a statistically significant difference between polished HTZ and polished E-max, with higher values seen in the polished E-max group.