草酸钾对牙本质小管堵塞作用的实验研究

Experimental study on dentinal obstruction by dipotassium oxalete.

应用扫描电镜、能谱分析技术研究草酸钾对离体牙本质脱敏试验的结果,表明草酸钾有良好的堵塞牙本质小管作用,实验标本表面钙化程度明显提高.

The purpose of this study was to cvalutc the effects of dentinal tubules obstruction by dipotassium oxalete in vitro with scanning electron microscopy and electron probe.Four pair of sections were taken from the roots of extracted teeth and divided into two groups randomly.One of the sections was treated with 30% dipotassium oxalctc and the other as control. SEM observation of the treated dcntin showed that no orifices of dentinal tubules presented and there were many oxalete crystals on the surface. On frozen fractured surfaces. most dentinal tubules were obstructed in the oxalcte-trcatcd samples and empty in the control. The concentration of Ca was significantly higher for oxalete group than that in the control. These results suggedtcd that .3' % dipotassium oxalete could obstruct firmly he dentinal tubules.