Effect of bleaching on pulpless discolored teeth.

使用基于过氧化脲的Night白色Excel或基于过氧化氢的Pyrenees对具有深色吹制颜色的鸡蛋的壳表面进行漂白。采用卤素灯（PENCURE）和KTP激光进行漂白反应。实验一分别采用卤素灯和KTP激光进行漂白.在施加漂白剂后，用3W的KTP激光分别照射蛋壳表面1分30秒、3分钟和5分10分钟。与KTP激光相同，用卤素灯分别照射壳表面1分30秒、3分钟、5分钟、10分钟。照射后，将所有标本在37 ℃下保存半天，并分析颜色变化。实验2采用卤素灯和KTP激光器联合使用。卤素灯和KTP激光的照射程序与实验1相同。所有标本还分析了颜色变化。结果，在实验1中，在Night Excel漂白剂应用之后，用KTP激光照射观察到漂白效果的发生超过三分钟。另一方面，在使用Pyrenees试剂的情况下，用KTP激光照射五分钟以上，证实了漂白效果。在卤素灯照射的样品中，使用Night白色Excel和Pyrenees应用程序的两种方法都显示了超过1分钟和30秒的照射效果。在实验2中，使用Night白色Excel和Pyrenees应用的两种方法照射超过1分钟和30秒也出现漂白效果。照射3min后，其效应更为明显。卤素灯和KTP激光照射顺序的不同不影响漂白效果。

The bleaching was performed on the surface of shell of the chicken egg with dark blown color, using Night White Excel which was based on urea peroxide or Pyrenees which was based on hydrogen peroxide. Halogen light (PENCURE) and KTP laser were used to occurring bleaching reaction. Halogen light and KTP laser were used the bleaching respectively in experiment 1. KTP laser was irradiated with 3W to the egg shell surface for 1 minute and 30 seconds, 3 minutes, and 5 minutes 10 minutes respectively after bleaching reagent application. Halogen light was also irradiated on the shell surface for 1 minute 30 seconds, 3 minutes, 5 minutes 10 minutes respectively same as KTP laser. After irradiation, all specimens were stored at 37 degree for half day and analyzed colored change. In experiment 2, halogen light and KTP laser were combined use together. The irradiated procedures of the halogen light and KTP laser were same as experiment 1. All specimens were also analyzed colored change. As a results, the occurring of the bleaching effect was observed more than three minutes with KTP laser irradiation after Night Excel bleaching agent application in experiment 1. On the other hand, the bleaching effect was confirmed over five minutes with KTP laser irradiations in using reagent of Pyrenees. In halogen light irradiation specimens, the bleaching effect was shown more than one minutes and 30 second irradiation both methods of Night White Excel and Pyrenees application. In experiment 2, the bleaching effect was also appeared more than one minute and 30 second irradiation both methods of Night White Excel and Pyrenees application. Furthermore the effectible was more clearly after 3 minutes irradiation. The difference of the order of irradiating the halogen light and the KTP laser was not influence of the affectability for the bleaching.