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http://dx.doi.org/10.14347/kadt.2015.37.4.199

Effect of Shade on All Ceramic Restoration based Zirconia according to Cooling rate on Firing  

Jeon, Jin-Hun (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University)
Min, Byung-Kuk (Department of Dental Technology, Dongnam Health University)
Hwang, Jae-Sun (Department of Dental Technology, Dongnam Health University)
Kim, Woong-Chul (Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University)
Publication Information
Journal of Technologic Dentistry / v.37, no.4, 2015 , pp. 199-203 More about this Journal
Abstract
Purpose: The purpose of this in vitro study was to evaluation the effect of shade on all ceramic restoration based zirconia according to cooling rate on Firing. Methods: 10 specimens applied to the dentin porcelain were made on the zirconia. After 5 specimens of the first group were burned in the furnace, these were put out rapidly. And after 5 specimens of the second group were burned in the furnace, these were put out slowly later 15 min. All specimens were measured $L^*$, $a^*$, $b^*$ using spectrophotometer, there were calculated 10 mean(SD) of descriptive statistics with SPSS program. These data were used for ${\Delta}E^*$ with color difference equation. Independent t tests were performed between 2 groups. Results: $L^*$, $a^*$, $b^*$ of 2 groups was statistically significant respectively (p<0.001), ${\Delta}E^*$ was 4.55 value. Conclusion: This study showed effect of shade on all ceramic restoration based zirconia according to cooling rate on Firing.
Keywords
shade; $L^*\a^*\b^*$; ${\Delta}E^*$; spectrophotometer;
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