Teeth with pulpal pathosis, whether received root canal treatment or not, often discolorate after a period of time, and thus influence the appearance. Internal Bleaching, also known as non-vital tooth bleaching, has mainly been done for tooth which received root canal treatment. Tooth will be placed bleaching material into pulp cavity in order to restore the original color of the teeth to improve the appearance. This method can provide patients with discolored anterior teeth an alternative prosthetic treatment.