The effect of setting accelerator on properties of mineral trioxide aggregate

被引：90

作者：

Huang, Tsui-Hsien ^{[2
]}

Shie, Ming-You ^{[2
]}

Kao, Chia-Tze ^{[1
]}

Ding, Shinn-Jyh ^{[1
]}

机构：

[1] Chung Shan Med Univ, Inst Oral Mat Sci, Taichung 402, Taiwan

[2] Chung Shan Med Univ, Inst Stomatol, Taichung 402, Taiwan

来源：

JOURNAL OF ENDODONTICS | 2008年 / 34卷 / 05期

关键词：

mineral trioxide aggregate; root-end filling material; setting time;

D O I：

10.1016/j.joen.2008.02.002

中图分类号：

R78 [口腔科学];

学科分类号：

1003 [口腔医学];

摘要：

The purpose of this study was to investigate the effect of a sodium phosphate dibasic (Na2HPO4) setting accelerator on the properties of white-colored mineral trioxide aggregate (WMTA). Setting times were measured by using a Gilmore needle. Changes in the pH value, diametral tensile strength, and phase composition of WMTA were evaluated. By using a 15% Na2HPO4 solution as a liquid phase mixed with WMTA, the setting time was significantly reduced to 26 minutes rather than the usual 3 hours. The 15% Na2HPO4 promoted WMTA to achieve a maximum diametral tensile strength of 4.9 MPa at an initial 6-hour aging time and 1 MPa for the cement mixed with water. The pH value of the 15% Na2HPO4-mixed cement was changed from an initial 11.0 to a high of 13.2, which was similar to the results using water. The results suggest that the Na2HPO4 solution may be an effective setting accelerator for WMTA.

引用

页码：590 / 593

页数：4

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