Effect of home and over the contour bleaching on stainability of CAD/CAM esthetic restorative materials.

Autor: Tinastepe N; Department of Prosthodontics, Private Practice, Istanbul, Turkey., Malkondu O; Department of Prosthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey., Iscan I; Department of Prosthodontics, Faculty of Dentistry, Medipol University, Istanbul, Turkey., Kazazoglu E; Department of Prosthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
Jazyk: angličtina
Zdroj: Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] [J Esthet Restor Dent] 2021 Mar; Vol. 33 (2), pp. 303-313. Date of Electronic Publication: 2020 Jul 03.
DOI: 10.1111/jerd.12604
Abstrakt: Objective: To determine the effect of home and over the counter bleaching on the stainability of CAD/CAM restorative materials, and to correlate the surface roughness with discoloration.
Material and Methods: Specimens were fabricated from feldspathic ceramic, an hybrid ceramic, a resin nano-ceramic, and lithium disilicate-reinforced glass ceramic. After baseline surface roughness (Ra1) and color measurement, each material was randomly divided into three groups according to bleaching regimen as Opalescence PF and; Opalescence Go; control. Then, the second color and surface roughness (Ra2) measurements were made. Thereafter, all specimens were immersed in a coffee solution for 12 days and the third color measurement was made. Color and whiteness change (CIELAB- ΔE ab , CIEDE2000-ΔE 00 , whiteness index-ΔWI D ) were calculated after bleaching (ΔE1;ΔE 00 1;ΔWI D 1) and immersion in the coffee solution (ΔE2;ΔE 00 2;ΔWI D 2).
Results: According to both CIELAB, CIEDE 2000 and WI D formulas, the highest mean ΔE1, ΔE2, ΔWI D 1, ΔWI D 2 values were observed for LAVA Ultimate groups while the lowest values were measured for e.max CAD groups. The findings also showed that there was a positively significant relationship between Ra2, and ΔE2 and ΔWI D 2.
Conclusions: Type of restorative materials and bleaching agents had an impact on color change after bleaching and immersion in coffee.
Clinical Significance: Home and over-the-counter bleaching agents may cause an increase in susceptibility of restorative materials to staining.
(© 2020 Wiley Periodicals LLC.)
Databáze: MEDLINE
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