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The evaluation of color and color difference according to the layering placement of Incisal shade composites on the body composites of the indirect resin restoration
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Su-Jung Park, Han-Young Lee, Myong-Yun Nah, Hoon-Sang Chang, Yun-Chan Hwang, Won-Mann Oh, In-Nam Hwang
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J Korean Acad Conserv Dent 2011;36(1):37-49. Published online January 14, 2011
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DOI: https://doi.org/10.5395/JKACD.2011.36.1.37
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 Abstract
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- Abstract
Objectives:
The aim of this study was to evaluate the surface color of indirect resin restoration according to the layering placement of different shade of incisal composite.
Materials and Methods:
In this study, CIE L*a*b* value of 16 Body composite of Tescera ATL (Bisco, Schaumburg IL, USA) was measured by spectrophotometer (NF999, Nippon Denshuku, Japan), and compared to CIE L*a*b* value of Vitapan shade guide. Nine shade Incisal composite of Tescera ATL were buildup to 1 mm thickness on Body composites inlay block, and CIE L*a*b* value was measured. Incisal composite was ground to 0.5 mm thickness and CIE L*a*b* value was re-measured. Color difference between Body composite and Incisal composites layered on Body composite was calculated as a function of thickness.
Results:
Color difference between corresponding shade of Tescera Body composite and Vitapan shade guide was from 6.88 to 12.80.
L* and b*value was decreased as layering thickness of Incisal composite on Body composite was increased. But, a* value did not show specific change tendency.
Conclusions:
Surface color difference between Body composites and Incisal composites layered on Body composite was increased as the layering thickness of Incisal composite increased (p < 0.05).
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KACD
