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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 61 - 66 (6page)
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초록· 키워드
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The aim of this study was to compare the color changes of three monolithic zirconia blocks by two shades before and after sintering. A total of 60 cuboid-shaped HT (H) and A2 (A) shade zirconia specimens (8.0×8.0×5.0 mm) were fabricated for the following materials: Razor (RZ) (RZ_H, RZ_A), Zenotec (ZN) (ZN_H, ZN_A), and Anatomic Coloured (AC) (AC_H, AC_A). A spectrophotometer was used to measure color coordinates (Commission Internationale de l'Eclairage [CIE] L*a*b*) before sintering. Sintering was done in the same condition. The color after sintering was evaluated, and color differences (ΔE*) before and after sintering were calculated. For comparisons, statistical analyses were conducted using a one-way analysis of variance (α=0.05). The ΔE* of the HT shade was significantly higher in the RZ_H (19.29±0.49) and AC_H (19.37±0.25) than in ZN_H (14.11±0.28). The ΔE* of A2 shade showed statistically significant difference in all groups, with RZ_A being the highest (28.39±0.51), followed by AC_A (23.01±0.43) and ZN_A (21.12±0.85). All materials had the largest ΔL* with decreasing direction. It indicated that the specimen darkened after sintering. The ΔL* in all materials was larger in the A2 group than in the HT group, and ΔE* was also larger in the A2 group. Within the limitations of this study, we conclude that after sintering of zirconia, the color change was the greatest in lightness, and the degree and pattern of change were different depending on the material and shade.
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참고문헌 (22)
참고문헌 신청
조준호 / 2014 / 치과용 지르코니아 블록의 소결온도가 기계적 특성과 미세구조에 미치는 영향 / 대한치과기공학회지 36(1):9~15
Juntavee N / 2019 / Influence of thermal tempering processes on color characteristics of different monolithic computer-assisted design and computer-assisted manufacturing ceramic materials / J Clin Exp Dent 11:e614~e624
공문천 / 2017 / 착색액 침지 횟수와 최종 소결 온도가 지르코니아 세라믹의 굴곡강도에 미치는 영향 / 대한치과재료학회지 44(2):171~178
Sen N / 2020 / Microstructural, physical, and optical characterization of high-translucency zirconia ceramics / J Prosthet Dent 123:761~768
Stawarczyk B / 2013 / The effect of zirconia sintering temperature on flexural strength, grain size, and contrast ratio / Clin Oral Investig 17:269~274
Juntavee N / 2019 / Influence of thermal tempering processes on color characteristics of different monolithic computer-assisted design and computer-assisted manufacturing ceramic materials / J Clin Exp Dent 11:e614~e624
공문천 / 2017 / 착색액 침지 횟수와 최종 소결 온도가 지르코니아 세라믹의 굴곡강도에 미치는 영향 / 대한치과재료학회지 44(2):171~178
Sen N / 2020 / Microstructural, physical, and optical characterization of high-translucency zirconia ceramics / J Prosthet Dent 123:761~768
Stawarczyk B / 2013 / The effect of zirconia sintering temperature on flexural strength, grain size, and contrast ratio / Clin Oral Investig 17:269~274
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