POWER WHITENING YF with 40 % hydrogen peroxide (mixed 32 %) is suitable for medical whitening of strongly discoloured teeth. Application 3 x 15-20 minutes in one session. Reasons for such discoloration of enamel and dentin can be illness, injury, medical treatments or excessive penetration of colouring substances. These cases require special medical measures to restore a healthy appearance of the teeth. POWER WHITENING YF can be used for whitening of one or more teeth or parts of a tooth, including the intracoronal bleaching of endodontically treated non-vital teeth.