title: Nonvital bleaching: general considerations and report of two failure cases.
abstract: This paper describes the rationale and procedures for noninvasive treatment of discolored nonvital teeth using the walking bleach technique. The limitations of this procedure and, in particular, the unpredictable color stability following non-vital bleaching are discussed and illustrated with two cases of rapid discoloration relapse. The possible reasons for treatment failure are examined and show that current knowledge regarding the origin and prevention of discoloration is limited.
authors: Department of Cariology and Endodontics, University of Geneva, Geneva, Switzerland. ddietschi@vtx.ch
authors: Didier
authors: D
authors: Dietschi
mesh_terms: D000077463:Carbamide Peroxide; D003116:Color; D003786:Dental Pulp Cavity / Q000187:drug effects; D004338:Drug Combinations; D005500:Follow-Up Studies; D006801:Humans; D006861:Hydrogen Peroxide / Q000008:administration & dosage / Q000627:therapeutic use; D007180:Incisor / Q000187:drug effects / Q000473:pathology; D016877:Oxidants / Q000008:administration & dosage / Q000627:therapeutic use; D010545:Peroxides / Q000008:administration & dosage / Q000627:therapeutic use; D012008:Recurrence; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000628:therapy*; D019553:Tooth, Nonvital / Q000628:therapy*; D017211:Treatment Failure; D014508:Urea / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000627:therapeutic use
chemical_list: D004338:Drug Combinations; D016877:Oxidants; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea; D006861:Hydrogen Peroxide