Document Details
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Document Type |
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Article In Journal |
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Document Title |
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Effect of core and veneer thicknesses on the color parameters of two all-ceramic systems Effect of core and veneer thicknesses on the color parameters of two all-ceramic systems |
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Document Language |
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English |
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Abstract |
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Statement of problem. Specific contributions of the core and the veneer thickness
on the appearance of layered disk specimens are not well characterized.
Purpose. This study examined the effect of varying core and veneer thickness on the
color parameters of layered disk specimens made of 2 ceramic systems.
Material and methods. Disk specimens 16 mm in diameter with core/veneer
thickness (mm) of 0.8/0.2 (baseline), 0.8/0.7, 0.8/1.2, 1.0/0.5, 1.3/0.2, and 1.8/0.2
were made from a leucite-reinforced ceramic (IPS Empress; 2B shade), and thickness
(mm) of 0.5/0.5 (baseline), 0.5/1.0, 0.5/1.5, 0.8/0.7, 1.0/0.5, and 1.5/0.5 were made
from a glass-infiltrated spinell ceramic (In-Ceram Spinell; A2 shade). Color
parameters L*, a*, and b* of CIELAB color space were measured against a neutral
gray background with a tri-stimulus colorimeter, and E between disk group and its
respective baseline group was calculated. Analysis of variance was used to determine
the effect of material and core and veneer thickness on the color parameters (a=.05).
Results. Increasing the total disk thickness resulted in decrease ofL* (P<.001) and an
increase of a* (P<.00l), b* (P<.00l), and E (P=.0236). For leucite-reinforced ceramic,
the core thickness, veneer thickness, and their interaction exhibited significant
influence on the mean values ofa* and b* (P<.0028) but not on the mean values of
L*. For spinell ceramic, the core thickness and veneer thickness exhibited significant
influence on the mean values ofL* and b* (P<.0272) but not on a*; the interaction
demonstrated significant influence on b* (P=.0003) but not on L* and a*. |
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ISSN |
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1 |
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Journal Name |
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The Journal of Prosthetic Dentistry |
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Volume |
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95 |
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Issue Number |
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2 |
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Publishing Year |
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2006 AH
2006 AD |
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Article Type |
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Article |
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Added Date |
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Tuesday, May 6, 2008 |
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Researchers
| عادل الخضري | Elkhodary, Adel | Researcher | Doctorate | |
| تامر شكري | Shokry, Tamer | Investigator | Doctorate | |
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