ABSTRACT
Background: Root canal obturation material caused the discoloration of the tooth after endodontic treatment. The remaining root canal material within the pulp chamber infiltrates the dentinal tubules and discolors the tooth. Intrinsic discoloration from root canal obturation material is typically seen on one-third of cervical teeth after endodontic therapy. Factors such as trauma, certain drugs such as tetracycline, hereditary, and excessive fluoride consumption also contribute to tooth discoloration. Walking bleaching is an internal whitening procedure used to improve tooth discoloration following endodontic therapy. The aim of this case report is to analyze tooth discoloration after endodontic treatment using the walking bleaching procedure. Case report: Female patient, age 22, reported tooth discoloration on her right front tooth, after endodontic treatment a few months ago. A radiographic examination reveals apical obturation without any discomfort. Visual examinations, such as negative vitality, percussion, and palpation tests, reveal second-degree tooth discoloration caused by tetracycline; maxillary right caninus appears darker on the cervical extension to the subgingiva; and internal bleaching was done using the walking bleaching method. Case Management: Bring two millimetres of gutta percha below orifice, then apply the glass ionomer cement barrier. Hydrogen peroxide 35% (opalescence endo) was applied to the top barrier, which is subsequently sealed with glass ionomer. After a week, when the tooth's color has matched, calcium hydroxide is applied. Two weeks later, the composite resin is used to fill cavities. The application of a 35% H2O2 paste has been shown to reverse tooth discoloration. Conclusion: Intrinsic tooth discoloration on non-vital tooth after endodontic treatment can be successfully restored with the walking bleach technique.
