착색 용액을 적용한 치과용 유색 지르코니아의 색 안정성과 용출 성분 평가
Evaluation of leaching components and color stability for colored dental zirconia with various coloring liquids
석수황, 이유미, 이상혁, 문학룡, 양형철, 임범순,
소속 상세정보
석수황 ( Seok Soo-Hwang ) - 서울대학교 치의학대학원 치과생체재료과학교실
이유미 ( Lee Yoo-Mee ) - 서울대학교 치의학대학원 치과생체재료과학교실
이상혁 ( Lee Sang-Hyeok ) - 서울대학교 치의학대학원 치과생체재료과학교실
문학룡 ( Moon Hag-Ryong ) - 단국대학교 대학원 보건학과
양형철 ( Yang Hyeong-Cheol ) - 서울대학교 치의학대학원 치과생체재료과학교실
임범순 ( Lim Bum-Soon ) - 서울대학교 치의학대학원 치과생체재료과학교실
KMID : 1035320140410030185
Abstract
The objective of this study was to evaluate the leaching components from the zirconia colored with various coloring liquids and color stability of the colored zirconia after accelerating aging. Commercially avaliable six coloring agents (AQU, BRU, DMA, LAV, RAI and INC) were tested. 3Y-TZP powder were used to prepare the disk-typed pre-sintered zirconia block. After application of coloring agents to pre-sintered zirconia block according to manufacturer’s instruction, final sintering was performed. XRD analysis was done to detect formation of secondary phases and phase transition of zirconia due to the addition of coloring agents. For the chemical stability test, ISO 6872:2008 was adopted and analytical equipments were used. ISO 7491:2000 was adopted for the color stability test. After accelerated aging treatments, color coordinates (CIE L*a*b*) were measured using spectrophotometer. Effects of coloring liquid on the microstructure of zirconia were not observed using XRD analysis, however, small peak of yittrium (Y) was observed in INC. In CTL and all experimental groups, Fe, Y, Mn and Ni ions were leached. Small amounts of Er, Co, and Cr ions were released from some experimental groups. The test of chemical stability in acetic acid solution did not affect the color stability of the colored zirconia (ΔE=0.06-0.69). After the accelerated aging treatment for 24 hrs, lightness (L*) and a* values showed the increasing behavior, but b* values did not show consistent changes. Color difference (ΔE) of CTL was 0.56, 1.61 for BRU, 1.26 for RAI, 1.16 for INC, 1.01 for DMA, 0.60 for AQU and 0.52 for LAV.
키워드
zirconia; coloring liquid; color stability; leaching components; accelerating aging
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