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Dergiler / Selcuk Dental Journal / 2025 / Volume: 12 Issue: 3

Effect of type and background shade on the masking ability of lithium disilicate-based ceramics

Abdulhaluk Savaş(Beyhekim Ağız ve Diş Sağlığı Hastanesi)0000-0002-8897-3928
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Yayın Tarihi
2025-12-29
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Keywords: Lithium disilicate, nano-lithium disilicate, zirconia-reinforced lithium disilicate, masking ability, color difference, ceramic

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Amaç & Hipotez:Background: The purpose of this in vitro study to evaluate the masking ability of three CAD-CAM ceramics—lithium disilicate (LDS), nano-lithium disilicate (NLD), and zirconia-reinforced lithium silicate (ZLS)—when placed over different abutment shades (opaque white [OW], A1, A2, A3.5) using CIEDE2000 (ΔE₀₀) color difference measurements.
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Temel Bulgular & Veri:Methods: Thirty rectangular ceramic plates (n=10 per material; IPS e.max CAD, Amber Mill, Celtra Duo) with a thickness of 1.5 ± 0.01 mm.
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Sonuç & Katkı:Keywords: Lithium disilicate, nano-lithium disilicate, zirconia-reinforced lithium disilicate, masking ability, color difference, ceramic
🔬Tür:Research Article
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Lithium disilicate · nano-lithium disilicate · zirconia-reinforced lithium disilicate

Abstract

Background: The purpose of this in vitro study to evaluate the masking ability of three CAD-CAM ceramics—lithium disilicate (LDS), nano-lithium disilicate (NLD), and zirconia-reinforced lithium silicate (ZLS)—when placed over different abutment shades (opaque white [OW], A1, A2, A3.5) using CIEDE2000 (ΔE₀₀) color difference measurements. Methods: Thirty rectangular ceramic plates (n=10 per material; IPS e.max CAD, Amber Mill, Celtra Duo) with a thickness of 1.5 ± 0.01 mm. Composite resin blocks in the OW, A1, A2, and A3.5 shades served as backgrounds. Color evaluation was performed using a dental spectrophotometer (Vita EasyShade V) using the CIE Lab system. Masking ability was calculated as ΔE₀₀ between baseline measurements on a white background and measurements over each abutment shade. Data were analyzed using two-way ANOVA and post-hoc comparisons with Tukey’s HSD and Bonferroni-adjusted LSD tests (α=0.05). Results: Abutment shade significantly affected ΔE₀₀ values (F=98.566, p<0.001). The lowest mean ΔE₀₀ was recorded for the A1 shade (3.89±0.04), while the highest was observed for A3.5 (4.83±0.04), which was significantly higher than all other shades (p<0.001). The material type was also significant (F=13.313, p<0.001). LDS exhibited the highest mean ΔE₀₀, followed by NLD and ZLS. On the A3.5 background, NLD demonstrated the poorest masking performance (5.12±0.08), which was significantly higher than that of LDS (p=0.014) and ZLS (p<0.001). A significant interaction between the material and abutment shade was observed (F=15.842, p<0.001). Conclusions: Masking ability varied significantly with both the ceramic type and abutment shade. Darker abutments (A3.5) resulted in greater color differences for all materials. Nano-lithium disilicate exhibited reduced masking on darker backgrounds, whereas zirconia-reinforced lithium silicate provided more consistent performance across shades. Keywords: Lithium disilicate, nano-lithium disilicate, zirconia-reinforced lithium disilicate, masking ability, color difference, ceramic

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Bu Makaleye Atıf Yap

Savaş, A. (2025). Effect of type and background shade on the masking ability of lithium disilicate-based ceramics. Selcuk Dental Journal, Volume: 12 Issue: 3. https://doi.org/10.15311/selcukdentj.1775990

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