Chong Y H
Department of Restorative Dentistry, Faculty of Dentistry, National University of Singapore, National University Hospital.
Quintessence Int. 1993 Apr;24(4):233-5.
A single discolored tooth is often difficult to treat, but one with an obliterated pulp chamber and root canal presents an even greater challenge. The use of nightguard bleaching is offered as a simpler, alternative treatment to either root canal therapy or the removal of sound tooth structure for fabrication of a facial veneer or a complete-coverage crown.