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KMID : 0362120110330030219
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Journal of Technologic Dentistry
2011 Volume.33 No. 3 p.219 ~ p.224
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Evaluation of Color Change According to Coloring Time of Dental Zirconia Block
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Choi Sung-Min
Nam Sang-Yong
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Abstract
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Purpose: The current study focused on investigating color change of dental zirconia block with respect to the block coloring time.
Methods: Three types of dental zirconia blocks(Zirtooth, Pearl-HT, D-Max) were tinted with coloring agent under four different time condition (0 minutes, 1 minutes, 10 minutes, 30 minutes). The quantitative evaluation of the tinted dental zirconia blocks was conducted with spectrophotometer.
Results: The Zirtooth and D-Max blocks showed lower H value. The Pearl-HT blocks showed poor reflectivity(L value).
Conclusion: The study of color change of zirconia block, which consists the substructure of all ceramic Crown, is applicable for deciding appropriate coloring condition when fabricating one layer ceramic Crown or double layer ceramic Crown.
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KEYWORD
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zirconia block, color reproducibility, colored zirconia, spectrophotometer, all-ceramics
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