The effect of firing times on the chroma of tetragonal zirconia polycrystal by adding rare-earth oxides.
- Author:
Yan GAO
1
;
Fu-qiang ZHANG
;
Hui HUANG
;
Lin-hua GUI
Author Information
- Publication Type:Journal Article
- MeSH: Dental Porcelain; Dental Stress Analysis; Materials Testing; Oxides; Surface Properties; Yttrium; Zirconium
- From: West China Journal of Stomatology 2010;28(5):484-487
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThe aim of this study is to evaluate whether the firing times affect the chroma of zirconia by adding rare-earth oxides.
METHODSSix kinds (S1, S2, S3, S4, S5, S6) of tooth-like yttria stabilized tetragonal zirconia polycrystal (Y-TZP) were available by introducing internal colorating technology, the color were gauged with ShadeEye NCC chromatometry instrument, and one-way ANOVA was used to analysis the color of each kind of tooth-like zirconia after 1, 2, 3, 4, 5 times firing individually.
RESULTSAfter 1, 2, 3, 4, 5 times firing respectively, the chromatic aberration ranged between 0.10-1.47 merely. The luminosity of three kinds (S1, S2, S6) of tooth-like zirconia were decreased (P < 0.05), the luminosity of the other three kinds (S3, S4, S5) of tooth-like zirconia were not obviously changed (P > 0.05), as for the hue and chroma, no significant differences were found (P > 0.05).
CONCLUSIONThere are no significant influence on the color of tooth-like Y-TZP after 1, 2, 3, 4, 5 times firing respectively, the chroma of yttria stabilized tetragonal zirconia polycrystal by adding rare-earth oxides are with high stability.
