TY  - JOUR
T1  - Influence Of Background And Cement Shades On The Color Of High-Translucency Lithium-Disilicate Ceramics
A1  - Mohammed Zahran
A1  - Dania Sabbahi
A1  - Ahmed Alghamdi
A1  - Ahmed Al-Otaibi
A1  - Bashayer Altaefi
A1  - Lina Baessa
A1  - Lalyan Bahha
JF  - Annals of Dental Specialty
JO  - Ann Dent Spec
SN  - 2347-2022
Y1  - 2020
VL  - 8
IS  - 1
SP  - 62
EP  - 66
N2  - Statement of the Problem. Matching anterior all-ceramic restoration shade to adjacent natural teeth or all-ceramic restoration is a challenging mission for both clinician and dental technician, especially when cemented to natural teeth and/or implant-supported abutments with different stump shades.

Aim. The effects of background and cement shades were assessed on color after cementation to high-translucent lithium-disilicate glass-ceramic (HT-LDGC).

Material and Methods. Sixty HT-LDGC specimens were sectioned with a standard thickness of 1.4 ± 0.2 mm. Background specimens were fabricated using four background groups (Zirconia, Lava Ultimate (shade A2), LuxaCore (shades light opaque (LO), and A3)). These were cemented with three shades of dual-cure self -adhesive resin cement (clear, white, and yellow). The 3 coordinates of the CIELAB system were measured using a spectrophotometer (Vita Easyshade Advance) at baseline for the ceramic alone and after cementation. Color difference (∆E00) values were calculated for each sample with the baseline measurement as control. Two-way ANOVA was used to analyze the effect of the background and cement shade on the color difference at a significance level of 0.05. 

Results. Two-way ANOVA revealed a significant effect of the background, cement shade, and their interaction on the color difference. The reported ∆E00 values ranged from 1.6 to 9.1. Most of the groups showed ∆E00 values higher than the clinically acceptable level (∆E00 >2.25). Only two groups of the combination of LO background and clear cement and combination of zirconia background and yellow cement showed means ∆E00 values within the clinically acceptable level (1.3 < ∆E00 ≤ 2.25).

Conclusion. It seems that matching all-ceramic HT-LDGC restorations with different background colors is a difficult task, especially when using HT ceramic. Varying the cement shade did not help in decreasing the color difference between the different background colors to a clinically acceptable level.
UR  - https://annalsofdentalspecialty.net.in/article/influence-of-background-and-cement-shades-on-the-color-of-high-translucency-lithium-disilicate-ceramics
ER  -