In Vitro Evaluation of Color Stability, Translucency and Flexure Strength of Different CAD CAM Materials

Document Type : Original Article


1 Fixed Prosthodontics Department Faculty of Dentistry, Cairo University, Egypt

2 Fixed Prosthodontics Department, Faculty of Dentistry, Sert University, Libya


The aim was to evaluate the color stability, translucency and flexure strength of different CAD CAM materials after immersion in different staining solutions.
Methods and Material:
In this study we used 45 specimens. These specimens were prepared from different CAD CAM materials including glass ceramics, resin nano ceramics and hybrid ceramics ( IPS E- max, Vita Enamic and Vita Suprinity respectively) (n=15 for each group). The color and translucency parameters were investigated using spectrophotometer initially and after exposing the specimens to various stained solutions (Cola, Coffee and distilled water). The flexure strength was evaluated using a universal testing machine (three point bending test) with a load cell of 5 kN. Numerical data were explored for normality by checking the distribution of data and using tests of normality (Kolmogorov-Smirnov and Shapiro-Wilk tests).
Regarding color stability, the results showed that there was significant change in color related to the Vita Enamic and Vita Suprinity groups when compared to the E.max group, when immersed in coffee rather than water and cola. Regarding translucency, there was no statistically significant difference between all types of ceramics. Regarding the flexure strength, there was a statistically significant difference between groups where the E.max show the highest strength and Vita Suprinity show least strength.
Immersion of the tested CAD CAM materials in different solutions did not change the color, translucency or the flexure strength of these materials .Except for Vita Enamic and Vita Suprinity when immersed in coffee the color stability was affected.


Main Subjects