하부구조물 및 두께에 따른 치과 수복용 세라믹의 색조에 대한 분광측색분석
Spectrophotometic analysis of the influence of substrate on the color of dental ceramics
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목적: 본 연구는 하부구조물과 축성된 도재의 두께 차이에 따른 색상의 차이를 비교연구하여 보고자 함이다. 연구 재료 및 방법: 금속하부구조물과 완전도재 하부구조물위에 0.5 mm 간격으로 도재의 두께를 다르게 축성을 한 후에 spectrophotometer를 이용하여, 색상을 측정하였다. 이후 측색값과 ΔE*값을 통계학적으로 비교 분석하였다. 결과: 도재의 두께가 증가함에 따라 명도가 감소하였다(P < 0.05). 세라믹 하부구조물의 경우 축성된 도재의 두께가 증가할수록 a*값이 감소였으나(P < 0.05), 두께는 b* 값에 유의한 영향을 주지 않았다. 도재 두께 차이가 0.5 mm 이하일 경우 ΔE*값이 1이하였다. 결론: 하부구조물의 종류에 따라 차이가 있으나, 도재의 두께가 색상에 영향을 주는 요소이며, 두께에 따른 색조 변화양상의 인지를 통하여, 임상에서 도재 두께변화를 이용한 색상조절에 도움이 될 것이라 사료된다.
Abstract
Purpose: The purpose of this study was to spectrophotometrically evaluate the influence of porcelain layer thickness and substructure. Materials and Methods: Four groups of porcelain specimens (metal and ceramic substructure) was prepared for analysis. Color parameters were measured with spectrophotometer and color difference (ΔE*) were calculated. T-test and one-way ANOVA test were used to find out significant difference and Tukey test was used to identify where the difference ware. Results: Increasing the thickness of porcelain decreased values (P < 0.05). Increasing the thickness of porcelain on ceramic substructure decreased the a* (P < 0.05) but, the b* were not statistically different. Total color difference (ΔE*) were below 1 when the difference of porcelain thickness were 0.5 mm. Conclusion: The thickness of porcelain are the factor effecting on color. This study will help the color are controlled by changing the thickness of porcelain clinically.
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