Effect of calcium chloride solution immersion on surface hardness of restorative glass ionomer cements

被引：8
|
作者：
Shiozawa, Maho [1 ]
Takahashi, Hidekazu [2 ]
Iwasaki, Naohiko [2 ]
Uo, Motohiro [1 ]
机构：
[1] Tokyo Med & Dent Univ, Grad Sch, Div Oral Hlth Sci, Dept Restorat Sci,Bunkyo Ku, Tokyo 1138549, Japan
[2] Tokyo Med & Dent Univ, Fac Dent, Sch Oral Hlth Care Sci, Course Oral Hlth Engn,Bunkyo Ku, Tokyo 1138549, Japan
来源：
DENTAL MATERIALS JOURNAL | 2013年 / 32卷 / 05期
关键词：
Glass ionomer cements; Calcium chloride; Surface hardness; Elemental analysis; MECHANICAL-PROPERTIES; MICROHARDNESS; WEAR;
D O I：
10.4012/dmj.2013-143
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
The objective of this study was to evaluate the effect of the concentration of calcium chloride (CaCI2) solution on the surface hardness of restorative glass ionomer cements (GICs). Two high-viscosity GICs, Fuji IX GP and GlasIonomer FX-II, were immersed in several concentrations of CaCI2 solution for 1 day and 1 week. The immersed specimen surfaces were evaluated using microhardness testing, grazing incidence X-ray diffraction, and energy-dispersive X-ray spectroscopy. Immersion in a higher concentration of CaCI2 solution produced a greater increase in the surface hardness. No crystalline substance was observed on the immersed surface. Calcium ions were selectively absorbed in the matrix of the GIC surface after immersion. They reacted with the non-reacted carboxylic acid groups remaining in the cement matrix. These reactions were considered to cause an increase in the surface hardness of the GICs.
引用
收藏
页码：828 / 833
页数：6
相关论文
共 50 条
12345