Dental and Medical Problems

Dent Med Probl
Index Copernicus (ICV 2021) – 132.50
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CiteScore (2021) – 2.0
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ISSN 1644-387X (print)
ISSN 2300-9020 (online)
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Dental and Medical Problems

2019, vol. 56, nr 4, October-December, p. 349–356

doi: 10.17219/dmp/111400

Publication type: original article

Language: English

License: Creative Commons Attribution 3.0 Unported (CC BY 3.0)

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Color and translucency stability of novel restorative CAD/CAM materials

Stabilność barwy i przezierności nowych materiałów używanych w technologii CAD/CAM

Elzahraa Eldwakhly1,2,A,B,C,D,E,F, Doaa Ragaai Mohamed Ahmed3,4,A,B,C,D,E,F, Manal Soliman5,A,B,F, Muhammad Masoud Abbas6,B,C,E,F, Wafa Badrawy7,A,B,C,D,E,F

1 Department of Clinical Dentistry, Faculty of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia

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

3 Department of Restorative Dentistry, Alexandria University, Egypt

4 Department of Restorative and Prosthetic Dental Sciences, Dar Al Uloom University, Riyadh, Saudi Arabia

5 Department of Restorative Dentistry, Faculty of Dentistry, Minya University, Egypt

6 Department of Dental Biomaterials, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt

7 Department of Restorative Dentistry, Faculty of Dentistry, University of Toronto, Canada


Background. The wide range of restorative materials available for use in the computer-aided design/ computer-aided manufacturing (CAD/CAM) technology requires a better understanding of their esthetic properties.
Objectives. The aim of the study was to assess the stability of the color and translucency of different CAD/ CAM restorative materials before and after being subjected to different staining solutions.
Material and Methods. A total of 160 disc-shaped specimens were prepared from glass ceramic (IPS-e.max®-CAD and Celtra Duo®), high-translucency zirconia (LavaTM Plus), resin nanoceramic (LavaTM Ultimate), and hybrid ceramic (VITA ENAMIC®) CAD/CAM blocks (5 groups, n = 32). The specimen color and translucency parameter (TP) were assessed using a spectrophotometer at baseline and after subjecting the specimens to different staining solutions (coffee, cola, ginger, and water). Changes in color (ΔE) and TP (ΔTP) were calculated. The data was analyzed using the analysis of variance (ANOVA) and Tukey’s post hoc test (p < 0.05). The correlation between ΔE and ΔTP was investigated using Pearson’s correlation coefficient.
Results. Staining significantly affected the baseline color of all specimens. Ginger had the most significant effect on Lava Plus (ΔE = 4.01 ±1.2), cola on Celtra Duo (ΔE = 2.29 ±0.25) and coffee on Lava Ultimate (ΔE = 2.59 ±0.17). Generally, IPS-e.max-CAD showed the smallest ΔE. No significant differences in ΔTP were found between different staining solutions. Increased ΔE correlated with decreased translucency for all the tested materials and staining solutions.
Conclusion. Staining had a marked effect on the color and translucency of the tested CAD/CAM materials. The color change was staining solutionand material-dependent, with IPS-e.max-CAD showing the greatest color stability.

Key words

computer-aided design/computer-aided manufacturing, translucency parameter, color change

Słowa kluczowe

komputerowo wspomagane projektowanie/komputerowo wspomagane wytwarzanie, parametr przezierności, zmiana koloru

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