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[Effects of varying the opaque thickness and the type of metal ceramic alloy on color].
Pei, Yan-Ping; Chen, Ji-Hua; Chang, Qing; Zhao, Gui-Wen; Xie, Bai-Mei.
Affiliation
  • Pei YP; Dept. of Stomatology, Navy General Hospital, Beijing 100037, China.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 23(2): 133-5, 2005 Apr.
Article in Zh | MEDLINE | ID: mdl-15952626
ABSTRACT

OBJECTIVE:

To compare the color differences of different metal bases and different opaque thickness, and evaluate the best thickness of opaque on different metal bases.

METHODS:

Precious metal, gold sediment and Ni-Cr plates were prepared as bases, then opaque samples of 0.05, 0.1, 0.2, 0.3, 0.4 and 0.5 mm thickness were fabricated on such plates. Minolta chromatics meter CR-321 was used to examine the color properties of these samples, and deltaE was calculated to evaluate the color difference of the specimens.

RESULTS:

For the restoration based on Ni-Cr and precious alloys, the color of restorations was not affected by the color of metal bases as the thickness of opaque reached 0.3 mm, and the chromatic value deltaE < 1.5 NBS. For the restoration based on gold sediment, the color of restoration was not affected by the color of metal as the thickness of opaque reached 0.1 mm, and the chromatic value deltaE < 1.5 NBS.

CONCLUSION:

Different opaque thickness was necessary to obtain ideal color appearance in clinic. As the opaque thickness increased, the color of restoration based on Ni-Cr and noble metal increased but the color of restoration based on gold sediment decreased.
Subject(s)
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Collection: 01-internacional Database: MEDLINE Main subject: Metal Ceramic Alloys / Color / Dental Porcelain Language: Zh Journal: Hua Xi Kou Qiang Yi Xue Za Zhi Year: 2005 Document type: Article
Search on Google
Collection: 01-internacional Database: MEDLINE Main subject: Metal Ceramic Alloys / Color / Dental Porcelain Language: Zh Journal: Hua Xi Kou Qiang Yi Xue Za Zhi Year: 2005 Document type: Article