Infinite optical thickness of dentine porcelain of IPS E.max A color series.
- Author:
Ting SUN
1
;
Long-quan SHAO
;
Yuan-fu YI
;
Bin DENG
;
Ning WEN
;
Wei-wei ZHANG
Author Information
- Publication Type:Journal Article
- MeSH: Coated Materials, Biocompatible; chemistry; Crowns; Dental Porcelain; chemistry; Dental Prosthesis Design; Humans; Prosthesis Coloring; Tooth Preparation, Prosthodontic; methods
- From: Journal of Southern Medical University 2011;31(2):259-261
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo determine the infinite optical thickness of dentine porcelain of IPS E.max A color series.
METHODSCylindrical dentine porcelain specimens of the IPS E.max A color series were prepared with a diameter of 13 mm and thickness of 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, and 5.0 mm. The chromatic value of all the specimens was determined with CM-5 spectrometer against standard black and white background. The chromatic aberration (deltaE) was calculated by regression equation.
RESULTSThe infinite optical thickness of dentine porcelain of the IPS E.max A color series ranged from 2.341 to 3.333 mm for a deltaE of 1.0, and from 2.064 to 2.904 mm for a deltaE of 1.5. As the chromaticity or thickness increased, the influence by the background color decreased, and the color of specimens became gradually close to the intrinsic color.
CONCLUSIONThe thickness of the background dentine porcelain specimens must exceed its infinite optical thickness to represent the intrinsic color and avoid the influence by the extrinsic color.
