Quantitative examination of factors influencing the colour reproduction ability of lithium disilicate glass-ceramics

Effects of ceramic translucency, layer thickness, and substrate colour on the shade of lithium disilicate glass-ceramic restorations proved to be significant in several studies, however, quantitative, numerical results on the relationship between the colour difference and these parameters are still...

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Bibliographic Details
Published in:BMC oral health 2024-06, Vol.24 (1), p.660-11, Article 660
Main Authors: Saláta, József, Szabó, Ferenc, Csuti, Péter, Antal, Melinda, Márton, Péter, Hermann, Péter, Borbély, Judit, Ábrám, Emese
Format: Article
Language:English
Subjects:
Analysis
Ceramic materials
Ceramics
Ceramics - chemistry
Cerium oxides
Color
Colour
Colour difference
Crystallization
Dental ceramic
Dental Porcelain - chemistry
Dentistry
Humans
Lithium
Lithium disilicate
Manufacturers
Materials Testing
Mechanical properties
Polymerization
Prosthesis Coloring
Reproduction
Shade
Silicones
Spectrophotometer
Spectrophotometry
Statistical analysis
Surface Properties
Translucency
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Summary:Effects of ceramic translucency, layer thickness, and substrate colour on the shade of lithium disilicate glass-ceramic restorations proved to be significant in several studies, however, quantitative, numerical results on the relationship between the colour difference and these parameters are still lacking. The purpose of this in vitro study was to quantitatively determine how the colour reproduction ability of a lithium disilicate glass-ceramic is affected by its translucency, layer thickness, and substrate colour. Ceramic samples were prepared from A2 shade IPS e.max CAD blocks with high and low translucencies (HT and LT) in a thickness range of 0.5-2.5 mm (+/- 0.05 mm). Layered samples were acquired utilizing composite substrates in 9 shades; transparent try-in paste was used. The spectral reflectance of the specimens was assessed under D65 standard illumination with a Konica Minolta CM-3720d spectrophotometer. The CIEDE2000 colour difference (ΔE ) between two samples was analysed using perceptibility and acceptability thresholds set at 50:50%. Statistical analysis involved linear regression analysis and the Kruskal-Wallis test. An increase in the thickness of 0.5 mm reduced the ΔE of the HT samples to 72.8%, and that of the T samples to 71.1% (p 
ISSN:1472-6831
1472-6831
DOI:10.1186/s12903-024-04429-w