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
Conclusion By adopting the root canal therapy together with the technologies of inner bleaching and seal dentinaltubule we can prevent and cure crown surface discoloration effectively.
结论在根管治疗的同时结合内漂白技术和牙本质小管封闭技术能有效地防治牙冠表面变色。
3
Conclusions Applying 30% supersaturated potassium oxalate to block dentinaltubule could prevent or reduce crown surface discoloration effectively after front teeth canal therapy.