Abstract
Objectives
The aim of the present study is to compare the colour stability and surface roughness of 3 different CAD/CAM materials (IPS e.max, VITA Enamic, and PEEK) after immersion in two beverage solutions (Coffee, Coca-Cola).
Methodology
Specimens from a lithium disilicate glass-ceramic (IPS e.max CAD), a hybrid ceramic (Vita Enamic), and PEEK (BioHPP) were evaluated for colour change and surface roughness under immersion in two beverage solutions (Coffee, Coca-Cola). A total of 30 specimens were prepared (10 X 10X 1) n=10. Spectrophotometer analysis was used to measure colour parameters (a*, b*, c*) before and after the immersion cycles and the average colour difference (Delta E*) was calculated after immersion in different beverages. Surface roughness was measured with a non-contact profilometer. Statistical analysis was performed using the Kruskal Wallis test with the Mann Whitney test as posthoc. The significance level was set at P ≤ 0.05.
Results
There was a significant colour change between the materials. Vita Enamic and PEEK samples showed the highest colour change value with coffee immersion (ΔE) (7.96± ¬3.86), (6.07± 3.12) respectively. While IPS e.max. CAD revealed the lowest colour change value (2.62 ±1.54) following coffee immersion with a statistically significant difference in between (P<0.011). After immersion in different media, there was a significant difference in surface roughness between the materials (p<0.05).
Conclusion
Vita Enamic and PEEK showed colour change beyond the clinically acceptable level, while IPS e.max CAD was the most stable material in colour and surface roughness
Acknowledgement
Not applicable
Funding
Self-funded