Opacity of glass-ionomer cements
作者:
AsmussenErik,
期刊:
Acta Odontologica Scandinavica
(Taylor Available online 1983)
卷期:
Volume 41,
issue 3
页码: 155-157
ISSN:0001-6357
年代: 1983
DOI:10.3109/00016358309162317
出版商: Taylor&Francis
关键词: Translucency;dental materials;operative dentistry
数据来源: Taylor
摘要:
The translucency of the first generation of glass-ionomer cements to appear on the market was too low to be cosmetically satisfactory. In the present study the opacity of newer editions of glass-ionomer cements was evaluated and compared with that of a well-known composite resin. Disc-shaped specimens were placed on black and on white backings, the luminous reflectances measured and corrected to a specimen thickness of exactly 1 mm, whereafter the contrast ratio was calculated. The newer glass-ionomer cements were found to be more translucent than the first generation of glass-ionomer cements on the market. However, the opacity still needs to be reduced to reach the level of a composite resin. It was further established that early water contact results in a considerable increase in opacity.
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