In this research non-thermal atmospheric pressure plasma jet, NAPP system has been build for the purpose of teeth bleaching. Extract teeth and dealt outside the mouth were used for the teeth bleaching process. These teeth were classified before and after plasma treatment for different time (3, 5, 10, and15minwith gas flow rate 5 and 2.5Ã?¢Ã?â??Ã?â??/min)by shade guide. For enhance teeth bleaching process by NAPP jet, water and different concentrations of H2O2were used. The effect of NAPPjet on the mechanical properties and teeth suffuse structure were steadied by Vickers hardness tester and SEM. The teeth temperature was measured during bleaching processes by a digital infra-red thermometer. NAPP jet is working on whiteness of the teeth in all circumstances and the best result obtained with the30% H2O2concentration where the teeth whiteness transition from 4D to 2E in the shad guide. While theteeth whiteness transition from 1D to 1A in the shad guide by using water at the seam condition. The NAPP treatment did not increase the temperature of the tooth surface above 35ºC.The results show that the plasma has no effect on the mechanical properties and structure of the teeth.it can be conclude that the NAPP can be a useful tooth bleaching device. And it has the ability to replace the conventional light sources that have limitations, such as high temperatures.
