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조신석,양홍서,Cho, Shin-Seog,Yang, Hong-So 대한치과보철학회 1994 대한치과보철학회지 Vol.32 No.1
Porcelain and resin are widely used in esthetic dentistry. In the field of esthetic dentistry, the color and color stability of prosthetic materials are very important in esthetics. In this study, porcelain and resin with the same color were used to veneer on the 3 different metal alloys. Color was evaluated by the CIE $L^*a^*b^*$ system. The purpose of this study was evaluated the cole, difference and cole, stability of the specimens, according to the veneered materials and types of metal alloys. Specimens were divided into 6 groups as follows ; Group 1; Porcelain on the precious metal alloy Group 2; Porcelain on the semiprecious metal alloy Group 3; Porcelain on the nonprecious metal alloy Group 4; Resin on the precious metal alloy Group 5; Resin on the semiprecious metal alloy Group 6; Resin on the nonprecious metal alloy The results obtained were as follows; 1. In porcelain specimens, $L^*$ values showed no significant difference and $a^*$ value of group 2 was lower than that of groups 1, 3 and $b^*$ value of group 2 was higher than that of groups 1, 3. The ${\Delta}E^*ab$ values between group 1-2, group 2-3 were higher than 1.5. 2. In resin specimens. $L^*$ value of group 6 was lower than that of groups 4, 5, $a^*$ value of group 4 was higher than that of group 6, $b^*$ value of group 4 was higher than that of groups 5, 6. The ${\Delta}E^*ab$ values between group 4-5, group 5-6 were higher than 1.5, and between group 4-6 was higher than 3.0. 3. Comparing with veneered materials, $L^*$ flues of porcelain were higher than that of resin. 3. Comparing with veneered materials, $L^*$ values of porcelain were higher than that of resin. In semiprecious metal alloy, $a^*$ values of porcelain were lower than that of resin. In semiprecious and nonprecious metal alloy, $b^*$ values of porcelain were higher than that of resin. The ${\Delta}E^*ab values were higher than 6.0. 4. The color stability of resin specimen was relatively inferior to porcelain specimen.
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조신석,양홍서 전남대학교 치과대학 1993 전남치대논문집 Vol.5 No.1
Porcelain and resin are widely used in esthetic dentistry. In the field of esthetic dentistry, the color and color stability of prosthetic materials are very important in esthetics. In this study, porcelain and resin with the same color were used to veneer on the 3 different metal alloys. Color was evaluated by the CIE L^* a^*b^* system. The purpose of this study was to evaluate the color difference and color stability of the specimens, according to the veneered materials and types of metal alloys. Specimens were divided into 6 groups as follows ; Group 1 ; Porcelain on the precious metal alloy Group 2 ; Porcelain on the semiprecious metal alloy Group 3 ; Porcelain on the nonprecious metal alloy Group 4 ; Resin on the precious metal alloy Group 5 ; Resin on the semiprecious metal alloy Group 6 ; Resin on the nonprecious metal alloy The results obtained were as follows : 1. In porcelain specimens, L^* values showed no significant difference and a^* value of group 2 was lower than that of groups 1, 3 and b^* value of group 2 was higher than that of groups 1, 3. The ΔE^*ab values between group 1-2, group 2-3 were higher than 1.5. 2. In resin specimens, L^* value of group 6 was lower than that of groups 4, 5, a^* value of group 4 was higher than that of group 6, b^* value of group 4 was higher than that of groups 5, 6. The ΔE^*ab values between group 4-5, group 5-6 were higher than 1.5, and between group 4-6 was higher than 3.0. 3. Comparing with veneered materials, L^* values of porcelain were higher than that of resin. In semiprecious metal alloy. a^* values of porcelain were lower than that of resin. In semiprecious and nonprecious metal alloy, b^* values of porcelain were higher than that of resin. The ΔE^*ab values were higher than 6.0. 4. The color stability of resin specimen was relatively inferior to porcelain specimen.
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Opaque의 두께가 전장용 레진의 색채에 미치는 영향
박상원,조신석,양홍서 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.3
The purpose of this study was to evaluate the color difference of specimens with the variation of metal type and opaque thickness. Resin veneered specimens with the same color were fabricated and evaluated by the CIE L*a*b* system. Specimens were divided into 4 groups as follows ; Group P1; Resin with precious metal alloy, 0.1 mm opaque layer Group P2; Resin with precious metal alloy, 0.5 mm opaque layer Group B1; Resin with nonprecious metal alloy, 0.1 mm opaque layer Group B2; Resin with nonprecious metal alloy, 0.5 mm opaque layer The results obtained were as follows ; 1. L* value of group P1 was lower than that of group P2. There was no significant differences in a* values among tested group. 2. Opaque thickness did not produce any significant differences of L*, a*, b* value in the resin veneer groups on the base metal. 3. The ΔE*ab value between P1 and P2 was 2.228 which is noticeable, while the color difference between B1 and B2 was slight.
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박상원,조신석,양홍서 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.3
In this study, metal specimens were made of semiprecious metal alloy and veneered with composite resin(Dentacolar, Kulzer). Germany, Color stability of each specimen was evaluated by the CIE L*a*b* system. Specimens were divided into 3 groups as follows ; Group 1; Resin with 0.1 mm opaque layer Group 2; Resin with 0.25 mm opaque layer Group 3; Resin with 0.5 mm opaque layer The purpose of this study was to evaluate the color difference and color stability of specimens, following to the opaque thickness. The results obtained were as follows ; 1. The group 1 had best color stability after thermocycling. 2. After thermocycling, the specimens with more than 0.25 mm opaque thickness showed detectable color change and ΔE*ab values were more than 3.3 level. 3. After thermocycling, L* value was decreased and a* value was increased in group 2 and 3.
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