Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns.
CAD/CAM
ceramic
colorimetry
crown
optical phenomena
Journal
Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.]
ISSN: 1708-8240
Titre abrégé: J Esthet Restor Dent
Pays: England
ID NLM: 101096515
Informations de publication
Date de publication:
09 2019
09 2019
Historique:
received:
16
07
2018
revised:
31
01
2019
accepted:
06
03
2019
pubmed:
9
4
2019
medline:
31
12
2019
entrez:
9
4
2019
Statut:
ppublish
Résumé
The aim of this in vitro study was to evaluate the effects of substrate colors, different levels of ceramic thickness and translucency, and cement shades on the color difference from a reference color of lithium-disilicate crowns. A premolar tooth preparation was made on a study model for 1.0 and 1.5 mm thick full-ceramic crowns. Digital impressions were taken (3Shape TRIOS) and crowns designed in a CAD program (DentalDesigner). Shade A1 crowns were milled (Everest, Kavo) from high-translucency (HT) and low-translucency IPS e.max (Ivoclar Vivadent) blocks. Twelve substrates were made of different colors and materials (Natural Die Material, Co-Cr, zirconia, and gold-colored alloy). Three different shades of try-in pastes were used to simulate the effect of cements (Variolink Esthetic try-in paste; Ivoclar). Shade measurement was done three times for each crown by a spectrophotometer (VITA Easyshade Advance); averages were compared to a reference crown (A1, HT, 1.5 mm, ND2 abutment, neutral try-in paste) with ΔE All the examined parameters influenced the ΔE All examined parameters influenced the final color of e.max CAD lithium-disilicate ceramic crowns. Matching the shade of ceramic crowns to the natural tooth color is a great challenge in dentistry. To meet patients' increasing esthetical expectations, CAD/CAM methods are very popular for full-ceramic crowns. However, several factors such as the shade of the abutment, luting cement color, ceramic thickness, and translucency may influence the final color. Our objective was to measure the optical effect of these factors on the final shade of CAD/CAM lithium-disilicate ceramic crowns.
Substances chimiques
Dental Materials
0
Dental Porcelain
12001-21-7
Lithium
9FN79X2M3F
Types de publication
Journal Article
Langues
eng
Pagination
457-464Informations de copyright
© 2019 The Authors. Journal of Esthetic and Restorative Dentistry published by Wiley Periodicals, Inc.
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