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Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns.
J Esthet Restor Dent. 2019 09; 31(5):457-464.JE

Abstract

OBJECTIVE

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.

MATERIALS AND METHODS

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 ΔE00 (CIEDE2000, according to the CIE latest standard) calculated.

RESULTS

All the examined parameters influenced the ΔE00 of the crowns. The weakest effect was exerted by the try-in paste.

CONCLUSIONS

All examined parameters influenced the final color of e.max CAD lithium-disilicate ceramic crowns.

CLINICAL SIGNIFICANCE

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.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Czigola A
Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
Abram E
Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
Kovacs ZI
Department of General Dental Preclinical Practice, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
Marton K
Department of General Dental Preclinical Practice, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
Hermann P
Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.
Borbely J
Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary.

MeSH

CeramicsColorComputer-Aided DesignCrownsDental MaterialsDental PorcelainHumansLithiumMaterials Testing

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30957412

Citation

Czigola, Alexandra, et al. "Effects of Substrate, Ceramic Thickness, Translucency, and Cement Shade On the Color of CAD/CAM Lithium-disilicate Crowns." Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], vol. 31, no. 5, 2019, pp. 457-464.
Czigola A, Abram E, Kovacs ZI, et al. Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns. J Esthet Restor Dent. 2019;31(5):457-464.
Czigola, A., Abram, E., Kovacs, Z. I., Marton, K., Hermann, P., & Borbely, J. (2019). Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns. Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], 31(5), 457-464. https://doi.org/10.1111/jerd.12470
Czigola A, et al. Effects of Substrate, Ceramic Thickness, Translucency, and Cement Shade On the Color of CAD/CAM Lithium-disilicate Crowns. J Esthet Restor Dent. 2019;31(5):457-464. PubMed PMID: 30957412.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns. AU - Czigola,Alexandra, AU - Abram,Emese, AU - Kovacs,Zoltan I, AU - Marton,Krisztina, AU - Hermann,Peter, AU - Borbely,Judit, Y1 - 2019/04/08/ PY - 2018/07/16/received PY - 2019/01/31/revised PY - 2019/03/06/accepted PY - 2019/4/9/pubmed PY - 2019/12/31/medline PY - 2019/4/9/entrez KW - CAD/CAM KW - ceramic KW - colorimetry KW - crown KW - optical phenomena SP - 457 EP - 464 JF - Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] JO - J Esthet Restor Dent VL - 31 IS - 5 N2 - OBJECTIVE: 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. MATERIALS AND METHODS: 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 ΔE00 (CIEDE2000, according to the CIE latest standard) calculated. RESULTS: All the examined parameters influenced the ΔE00 of the crowns. The weakest effect was exerted by the try-in paste. CONCLUSIONS: All examined parameters influenced the final color of e.max CAD lithium-disilicate ceramic crowns. CLINICAL SIGNIFICANCE: 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. SN - 1708-8240 UR - https://www.unboundmedicine.com/medline/citation/30957412/Effects_of_substrate_ceramic_thickness_translucency_and_cement_shade_on_the_color_of_CAD/CAM_lithium_disilicate_crowns_ DB - PRIME DP - Unbound Medicine ER -