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Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown.
J Prosthet Dent. 2011 Feb; 105(2):83-90.JP

Abstract

STATEMENT OF PROBLEM

A dark-colored prepared abutment tooth may negatively affect the esthetic outcome of a ceramic restoration if the tooth is restored using translucent enamel-like ceramic materials.

PURPOSE

The purpose of this study was to evaluate the cumulative effect that the tooth abutment color, cement color, and ceramic thickness have on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown.

MATERIAL AND METHODS

A CAD/CAM glass-ceramic lithium disilicate-reinforced monolithic crown (IPS e.max CAD LT) was fabricated. Three possible crown restoration variables were tested in vitro. The procedure examined 4 prepared abutment tooth colors (light, medium light, medium dark, and dark), 2 cement (Variolink II) colors (translucent and opaque), and 4 ceramic thickness values (1.0 mm, 1.5 mm, 2.0 mm, and 2.5 mm). The color of each combination was measured using a spectrophotometer, and the average values of the color difference (ΔE) were calculated. The data were analyzed with a 3-way ANOVA (tooth abutment color, ceramic thickness, and luting agent) and Tukey's HSD test (α=.05), which evaluated within-group effects of the tooth abutment color to the ΔE at each ceramic thickness.

RESULTS

The ΔE values of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown were significantly influenced by the tooth abutment color (P<.001), cement color (P<.001), and ceramic thickness (P<.001). Significant interactions were present among these 3 variables (P<.001). A dark-colored abutment tooth demonstrated the greatest ΔE values relative to other variables tested. An increase in ceramic thickness resulted in a significant decrease in ΔE values (P<.01). The ΔE values were slightly decreased when the crowns were cemented using the opaque cement.

CONCLUSIONS

This study demonstrated that underlying tooth abutment color, cement color, and ceramic thickness all influence the resulting optical color of CAD/CAM glass-ceramic lithium disilicate-reinforced restorations.

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Authors+Show Affiliations

Chaiyabutr Y
Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash., USA. yada@koiscenter.com
Kois JC
No affiliation info available
Lebeau D
No affiliation info available
Nunokawa G
No affiliation info available

MeSH

Analysis of VarianceColorColorimetryComputer-Aided DesignCrownsDental AbutmentsDental PorcelainDental Prosthesis DesignHumansLithium CompoundsOptical PhenomenaProsthesis ColoringResin Cements

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21262405

Citation

Chaiyabutr, Yada, et al. "Effect of Abutment Tooth Color, Cement Color, and Ceramic Thickness On the Resulting Optical Color of a CAD/CAM Glass-ceramic Lithium Disilicate-reinforced Crown." The Journal of Prosthetic Dentistry, vol. 105, no. 2, 2011, pp. 83-90.
Chaiyabutr Y, Kois JC, Lebeau D, et al. Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. J Prosthet Dent. 2011;105(2):83-90.
Chaiyabutr, Y., Kois, J. C., Lebeau, D., & Nunokawa, G. (2011). Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. The Journal of Prosthetic Dentistry, 105(2), 83-90. https://doi.org/10.1016/S0022-3913(11)60004-8
Chaiyabutr Y, et al. Effect of Abutment Tooth Color, Cement Color, and Ceramic Thickness On the Resulting Optical Color of a CAD/CAM Glass-ceramic Lithium Disilicate-reinforced Crown. J Prosthet Dent. 2011;105(2):83-90. PubMed PMID: 21262405.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of abutment tooth color, cement color, and ceramic thickness on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. AU - Chaiyabutr,Yada, AU - Kois,John C, AU - Lebeau,Dene, AU - Nunokawa,Gary, PY - 2011/1/26/entrez PY - 2011/1/26/pubmed PY - 2011/5/18/medline SP - 83 EP - 90 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 105 IS - 2 N2 - STATEMENT OF PROBLEM: A dark-colored prepared abutment tooth may negatively affect the esthetic outcome of a ceramic restoration if the tooth is restored using translucent enamel-like ceramic materials. PURPOSE: The purpose of this study was to evaluate the cumulative effect that the tooth abutment color, cement color, and ceramic thickness have on the resulting optical color of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown. MATERIAL AND METHODS: A CAD/CAM glass-ceramic lithium disilicate-reinforced monolithic crown (IPS e.max CAD LT) was fabricated. Three possible crown restoration variables were tested in vitro. The procedure examined 4 prepared abutment tooth colors (light, medium light, medium dark, and dark), 2 cement (Variolink II) colors (translucent and opaque), and 4 ceramic thickness values (1.0 mm, 1.5 mm, 2.0 mm, and 2.5 mm). The color of each combination was measured using a spectrophotometer, and the average values of the color difference (ΔE) were calculated. The data were analyzed with a 3-way ANOVA (tooth abutment color, ceramic thickness, and luting agent) and Tukey's HSD test (α=.05), which evaluated within-group effects of the tooth abutment color to the ΔE at each ceramic thickness. RESULTS: The ΔE values of a CAD/CAM glass-ceramic lithium disilicate-reinforced crown were significantly influenced by the tooth abutment color (P<.001), cement color (P<.001), and ceramic thickness (P<.001). Significant interactions were present among these 3 variables (P<.001). A dark-colored abutment tooth demonstrated the greatest ΔE values relative to other variables tested. An increase in ceramic thickness resulted in a significant decrease in ΔE values (P<.01). The ΔE values were slightly decreased when the crowns were cemented using the opaque cement. CONCLUSIONS: This study demonstrated that underlying tooth abutment color, cement color, and ceramic thickness all influence the resulting optical color of CAD/CAM glass-ceramic lithium disilicate-reinforced restorations. SN - 1097-6841 UR - https://www.unboundmedicine.com/medline/citation/21262405/Effect_of_abutment_tooth_color_cement_color_and_ceramic_thickness_on_the_resulting_optical_color_of_a_CAD/CAM_glass_ceramic_lithium_disilicate_reinforced_crown_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-3913(11)60004-8 DB - PRIME DP - Unbound Medicine ER -