Quantitative examination of factors influencing the colour reproduction ability of lithium disilicate glass-ceramics.
Colour
Colour difference
Dental ceramic
Dental materials
Lithium disilicate
Materials science
Spectrophotometer
Substrate
Thickness
Translucency
Journal
BMC oral health
ISSN: 1472-6831
Titre abrégé: BMC Oral Health
Pays: England
ID NLM: 101088684
Informations de publication
Date de publication:
05 Jun 2024
05 Jun 2024
Historique:
received:
21
03
2024
accepted:
31
05
2024
medline:
6
6
2024
pubmed:
6
6
2024
entrez:
5
6
2024
Statut:
epublish
Résumé
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 An increase in the thickness of 0.5 mm reduced the ΔE The colour reproduction ability of lithium disilicate glass-ceramics is significantly affected by their translucency, layer thickness, and 7 substrates out of 9 substrates examined.
Sections du résumé
BACKGROUND
BACKGROUND
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.
METHODS
METHODS
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
RESULTS
RESULTS
An increase in the thickness of 0.5 mm reduced the ΔE
CONCLUSIONS
CONCLUSIONS
The colour reproduction ability of lithium disilicate glass-ceramics is significantly affected by their translucency, layer thickness, and 7 substrates out of 9 substrates examined.
Identifiants
pubmed: 38840111
doi: 10.1186/s12903-024-04429-w
pii: 10.1186/s12903-024-04429-w
doi:
Substances chimiques
Dental Porcelain
12001-21-7
lithia disilicate
0
Glass ceramics
85422-94-2
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
660Informations de copyright
© 2024. The Author(s).
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