Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate

Paolone, Gaetano; Collivasone, Giacomo; De Masi, Niccolò; Heinichen, Alicia; Greco, Katia; Gherlone, Enrico; Cantatore, Giuseppe

doi:10.3390/ma18133020

Open AccessArticle

Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate

by

Gaetano Paolone

^*

,

Giacomo Collivasone

,

Niccolò De Masi

,

Alicia Heinichen

,

Katia Greco

,

Enrico Gherlone

and

Giuseppe Cantatore

Dental School, IRCCS San Raffaele Hospital, Vita-Salute University, 20132 Milan, Italy

^*

Author to whom correspondence should be addressed.

Materials 2025, 18(13), 3020; https://doi.org/10.3390/ma18133020

Submission received: 13 May 2025 / Revised: 18 June 2025 / Accepted: 23 June 2025 / Published: 25 June 2025

(This article belongs to the Special Issue Recent Research in Restorative Dental Materials)

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Abstract

The aim was to assess the blending effect of universal-shade resin-based composites (RBCs) (Omnichroma—OC; Clearfil Majesty Universal–CM; Venus Pearl—V; Transcend—T) used for repair for lithium disilicate blocks. Fifteen parallelepiped-shaped (10.5 × 10.5 × 3 mm) specimens with four cavities (3 mm in diameter and 2 mm in depth) were designed from lithium disilicate CAD/CAM blocks (CEREC Tessera HT A3) and milled. Specimens were then randomly divided into five groups based on the five resin composite materials for cavity restoration (n = 12): Group 1, control group (F); Group 2 (T); Group 3 (OC); Group 4 (V); and Group 5 (CM). After surface conditioning, composite resins were applied to the ceramic surface. Color measurements were taken with a colorimeter in the center of the resin restoration and on the CAD/CAM block. Tristimulus values were converted to CIELab color coordinates and color differences were expressed in ΔE₀₀ units using the CIEDE-2000 formula. F showed significantly better color matching (ΔE₀₀ = 2.51 ± 0.64) in comparison to single-shade RBCs except T (ΔE₀₀ = 2.55 ± 0.64). All groups exceeded perceptibility and acceptability thresholds. The control group presented higher color matching than the single shade universal composites except for Transcend.

Keywords: chameleon effect; universal shades; CAD/CAM; lithium disilicate; composite; repair; color adjustment potential

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MDPI and ACS Style

Paolone, G.; Collivasone, G.; De Masi, N.; Heinichen, A.; Greco, K.; Gherlone, E.; Cantatore, G. Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate. Materials 2025, 18, 3020. https://doi.org/10.3390/ma18133020

AMA Style

Paolone G, Collivasone G, De Masi N, Heinichen A, Greco K, Gherlone E, Cantatore G. Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate. Materials. 2025; 18(13):3020. https://doi.org/10.3390/ma18133020

Chicago/Turabian Style

Paolone, Gaetano, Giacomo Collivasone, Niccolò De Masi, Alicia Heinichen, Katia Greco, Enrico Gherlone, and Giuseppe Cantatore. 2025. "Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate" Materials 18, no. 13: 3020. https://doi.org/10.3390/ma18133020

APA Style

Paolone, G., Collivasone, G., De Masi, N., Heinichen, A., Greco, K., Gherlone, E., & Cantatore, G. (2025). Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate. Materials, 18(13), 3020. https://doi.org/10.3390/ma18133020

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Chameleon Effect of Universal Shade Composite Polymers in Repairing CAD/CAM Lithium Disilicate

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