摘要
目的:观察和检测MTA在体外不同条件下材料表面形态和组成成分的变化。方法:将银汞合金,Dycal,Dyract和MTA分别充填入预备过的不同根块中,含材料的根块分别浸泡于蒸馏水或SBF溶液中5d,扫描电镜和X射线能谱(EDS)对材料的表面形貌和化学成分进行观察检测。结果:MTA的表面形貌和成分都发生了改变,在SBF溶液中材料表面形成大小均匀的球形有序晶体,EDS分析结果显示晶体的化学组成与磷酸三钙钙磷摩尔比相近。结论:在适宜的条件下MTA具有形成磷灰石晶体的生物学潜力和活性。
Objective:To examine the surface of mineral trioxide aggr eg ate (MTA) when treated in different conditions in vitro. Method: Root blocks were prepared. MTA and other three dental materials (Dycal, Dyr act and amalgam) were respectively filled into the root canals of prepared root blocks. The roots with the materials were maintained in distilled water or simul ated body fluid (SBF) at 37 ℃ for 5 days. Scanning electron microscopy(SEM) and X-ray energy dispersive spectroscopy(EDS) were employed to investigate the mor phological changes and chemical components. Results:There was pr ecipitate of simple crystal units or crystalline structure in the MTA specimens. EDS showed one or two peaks corresponding to calcium or calcium and phosphorus. Conclusions:Apatite may produce and grew by MTA on its surface.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2005年第3期346-348,共3页
Journal of Practical Stomatology
关键词
MTA
扫描电子显微镜
X射线能谱
Mineral trioxide aggregate
Scanning electron mi croscope, X-ray energy dispersive spectroscopy(EDS)
