Tooth Discolouration when using Odontopaste as a root canal medicament

Methods: Access cavities were cut and the root canals were prepared using a standard technique to a size 35 file in forty maxillary and mandibular extracted anterior teeth.  The teeth were randomly divided into four groups of 10 teeth each and the medicaments were placed as follows: Groups 1 and 2 had Odontopaste placed in the root canals ensuring that all of the paste was below the cemento-enamel junction. In Group 3 and 4, Ledermix paste was applied in the same manner. Cavit was then placed in the access cavities of all the teeth. Groups 1 and 3 were left in sunlight while Groups 2 and 4 left in the dark for 12 weeks. The teeth were assessed every two weeks for colour changes.

Results: After 12 weeks, definite grey changes were noted in Group 3 but no grey discolouration was noted in the other groups. However, Groups 1, 2, and 4 showed slight yellow colour changes.

Conclusions: There were some changes in color but no grey discoloration when Odontopaste was used as an intracanal medicament.