[Effect of staining method and sintering temperature on the color of porcelain-fused-to-metal restorations]

[Effect of staining method and sintering temperature on the color of porcelain-fused-to-metal restorations] Research Abstract Details 

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[Effect of staining method and sintering temperature on the color of porcelain-fused-to-metal restorations] Abstract Text:

Yan Wang,Wei-hao Yan,Xin-chun Zhang,Yue Huang,Lin-han Shen,

PURPOSE: To investigate the effect of staining method and sintering temperature on the color of porcelain-fused-metal restorations. METHODS: 40 cylindrical stained porcelain-metal specimens of 15 mm in diameter and 6 mm in height were fabricated with customized mould, consisting of 2 mm Ni-Cr metal, 1 mm opaque porcelain, 2 mm dentine porcelain and 1 mm enamel porcelain. The specimens were prepared by 5 techniques, 8 for each group. Group A: internal staining, Group B: external staining, 900 degrees centigrade sintering temperature was used in both A and B group; Group C to E: external staining, with the sintering temperature of 880 degrees centigrade, 900 degrees centigrade and 920 degrees centigrade respectively. Sofu A2 porcelain and Sofu 44 stain system were used for the study. Using standard white plate as a reference, colors (L*,a*,b* coordinates) of the specimens were measured with a computerized colorimeter. Student's t test and one way ANOVA were used to analyze the data. RESULTS: DeltaE, b* and Delta C(ab)* of Group B (external staining) and group A (internal staining) were 43.72 +/- 2.99/26.51 +/- 1.64/31.31 +/- 2.48 and 39.71 +/- 1.78/23.69 +/- 0.36/26.55 +/- 2.16, respectively. The values of the former group were significantly higher than that of the latter (P < 0.05); For Group C to E, there were no significant differences in all the color parameters. CONCLUSIONS: Staining method has a significant effect on the color parameters of porcelain-fused-to-metal restorations; For external staining, within the clinically-used range, changing the sintering temperature does not have an obvious effect on the color.

[Effect of staining method and sintering temperature on the color of porcelain-fused-to-metal restorations] Publishing Authors By Initials

Y Wang,WH Yan,XC Zhang,Y Huang,LH Shen,

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[Effect of staining method and sintering temperature on the color of porcelain-fused-to-metal restorations] Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Shanghai kou qiang yi xue = Shanghai journal of st

VOLUME: 13

Page Numbers: 553-6

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ISSN: 1006-7248

DAY: 27

MONTH: Dec

YEAR: 2004

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LANGUAGE: chi

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AFFILIATION: Department of Prosthodontics, Guanghua College of Stomatology, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China.

Country: China

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MEDLINETA: Shanghai Kou Qiang Yi Xue

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