This chapter focuses on the treatment of discolored traumatized teeth, most of them being non-vital and subsequently, endodontically treated. Tooth bleaching based upon hydrogen peroxide as the active agent, applied directly or produced in a chemical reaction from sodium perborate or carbamide peroxide, must be regarded as the treatment of choice, alone or preceding a prosthetic restoration. More than 90% immediate success has been reported for intracoronal bleaching of non-vital teeth, but in a period of 1–8 years after treatment, 10–40% of the initially successfully treated teeth needed retreatment.