It was testified by sem that the dentinaltubule was sealed by semiconductor laser irradiation.
扫描电镜显示，用半导体激光仪照射后，牙本质小管口被封闭。
2
There were significant differences ( P< 0.05) in the relative area of the dentinaltubule orifices between two groups.
牙本质小管口的相对面积各组之间的差异均有显著性（P<0.05）。
3
Conclusions Applying 30% supersaturated potassium oxalate to block dentinaltubule could prevent or reduce crown surface discoloration effectively after front teeth canal therapy.