Discolored anterior teeth can have a very negative effect on a patient’s appearance.
Bleaching represents an alternative to invasive treatment such as crowning and the use of
veneers1 for correcting discoloration, while at the same time preserving the hard tissue of
the tooth. Endodontically treated, discolored teeth are generally bleached internally using
the walking bleach technique, in which the bleaching agent (recommended agent: a mixture
of sodium perborate/water) is left in the pulp chamber for about 3 or 4 days.2 Consequently,
the problems outlined below involved in the bleaching of endodontically treated teeth relate
exclusively to the walking bleach technique.