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Effect of home and over the contour bleaching on stainability of CAD / CAM esthetic restorative materials
Author(s) -
Tinastepe Neslihan,
Malkondu Ozlem,
Iscan Ipek,
Kazazoglu Ender
Publication year - 2021
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12604
Subject(s) - opalescence , ceramic , surface roughness , dental porcelain , materials science , carbamide peroxide , surface finish , composite material , dentistry , polishing , chemistry , nuclear chemistry , medicine , optics , enamel paint , physics
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.