SPECTROPHOTOMETRIC ANALYSIS OF THE EFFECT OF TOOTHBRUSHING ON EXTERNALLY STAINED IPS EMPRESS PORCELAIN.
- Author:
Woo Jin SHIN
1
;
Young Sik JOEN
;
Dong Hoo HAN
Author Information
1. Department of Prosthodontics, College of Dentistry, Yonsei University, Korea.
- Publication Type:Original Article
- Keywords:
IPS Empress;
Spectrophotometer;
Toothbrushing;
External stain
- MeSH:
Aluminum Oxide;
Dental Porcelain*;
Hydrofluoric Acid;
Stroke;
Tooth;
Toothbrushing*
- From:The Journal of Korean Academy of Prosthodontics
1997;35(2):344-356
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study was to evaluate the long term tooth-brushing effect on the color change of specially treated IPS Empress porcelain surface. Staining technique with blue stain and liquid was used. The surfaces of the specimen were treated with 5% and 10% Hydrofluoric acid, 50mm and 250mm alumina sandblast, and then blue stain and liquid were used for external stain. After 29,200, 58,400, 87,600, 116,200 brushing strokes (equivalent to 2, 4, 6, 8 years each), color changes of the stained layer were measured with spectrophotometer(CM-3500d, MINOLTA, Thkyo, Japan). The result of this study was obtained as follows : 1. The color changes were great after 29,200 tooth brushing strokes in every group, but from 29,200 strokes to 116,800 strokes, there were no significant color changes in each group.(p>0.05) 2. The greatest color changes were observed in 5% HF treated group and the least color changes were observed in 50 micrometer aluminar sandblast treated group in every stroke(p<0.05), but no ststistical difference between groups compared with control group(p>0.05). According to these results, pretreatment of I.P.S. Empress porcelain with alumina sandblast improved the color of IPS Empress porcelain significantly on this condition, but long term follow-up will be needed.
