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KMID : 0362120130350030185
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Journal of Technologic Dentistry
2013 Volume.35 No. 3 p.185 ~ p.192
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Comparative study of color reproducibility of zirconia using a dipping method and coating method
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Lee Hee-Jung
Kim Jae-Hong
Kim Woong-Chul
Kim Ji-Hwan
Kim Hae-Young
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Abstract
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Purpose: The aim of this study was to compare with color reproducibility of the coating method and dipping method using a colour liquid.
Methods: Two groups of square-shaped specimens (10 10 in diameter, 1.5 thickness) were prepared for analysis(n=15/group). The CM(Coating Method) group was fabricated as full zirconia specimens with the coating coloring method and Group DM(Dipping Method) was prepared as specimens of 0.7 mm-thick zirconia plate using the dipping coloring method and veneered with 0.8mm-thick porcelain. Color parameters were measured with ShadeEye NCC spectrophotometer and color differences were calculated using the equation E* = {( L*)2+( a*)2+( b*)2}1/2. Non-parametric statistical methods, the Mann-Whitney test, and the Kruskal-Wallis test were used to analyze the data. Type one error rate was set at 0.05.
Results: Color difference values larger than 7 were observed between specimens with the coating method and the dipping method, which were detectable difference in a clinical setting.
Conclusion: Cautious application of the coating coloring method in a clinical setting and further researches to
standardize the coating method are needed.
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KEYWORD
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colour liquid, veneer, all-ceramic crown, color difference
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