MTA和波特兰水泥的砷释放量。
Arsenic release provided by MTA and Portland cement.
作者信息
Duarte Marco Antonio Hungaro, De Oliveira Demarchi Ana Claudia Cardoso, Yamashita José Carlos, Kuga Milton Carlos, De Campos Fraga Sylvio
机构信息
Departament of Endodontics, Sagrado Coração University, Bauru, Brazil.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2005 May;99(5):648-50. doi: 10.1016/j.tripleo.2004.09.015.
OBJECTIVE
The aim of the present study was to determine the release of arsenic from 2 gray Portland cements, a white Portland cement, and 2 MTAs (ProRoot and MTA-Angelus).
STUDY DESIGN
The materials were manipulated and placed in plastic tubes, and the tubes were immersed in glass flasks containing water with grade reagent, pH 5.0. After 3 and 168 h, the water in which the material had been immersed was analyzed regarding the presence of arsenic by atomic absorption spectrophotometry with hydride generation.
RESULTS
The levels of arsenic released were similar for Portland cements and MTAs, and were well below those considered to be harmful.
CONCLUSIONS
MTA and Portland cements showed very low arsenic presence. The results suggest that MTAs and Portland cements are safe for use in clinical practice in terms of the presence of arsenic.
目的
本研究的目的是测定两种灰色波特兰水泥、一种白色波特兰水泥和两种矿物三氧化物凝聚体（ProRoot和MTA-Angelus）中砷的释放情况。
研究设计
将材料进行处理并置于塑料管中，然后将管子浸入装有pH值为5.0的优质试剂水的玻璃烧瓶中。3小时和168小时后，通过氢化物发生原子吸收分光光度法分析材料所浸泡水中砷的存在情况。
结果
波特兰水泥和矿物三氧化物凝聚体释放的砷水平相似，且远低于被认为有害的水平。
结论
矿物三氧化物凝聚体和波特兰水泥中砷的含量非常低。结果表明，就砷的存在而言，矿物三氧化物凝聚体和波特兰水泥在临床实践中使用是安全的。
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