Investigation of Discoloration of Anterior Teeth With Three Types of Substances Used in Endodontic Treatment.

OBJECTIVE: This study aims to investigate the discoloration of anterior teeth with three types of substances used in endodontic treatment. MATERIALS AND METHODS: In this laboratory study, 75 newly extracted human anterior (central and lateral) teeth with full roots were examined. This study utilized the following materials: AH26, MTA Base (Maruchi), a novel formulation containing nano-zinc particles, and a second novel formulation containing both nano-zinc and nano-copper particles. The teeth in the first three groups were dried with paper points, and the canals were completely sealed using the sealer lateral filling technique with gutta-percha. Then the color of the samples was measured by a spectrophotometer at four times: initially, immediately after filling (0), 14 days, and 28 days later. RESULTS: The results showed that the mean color change (∆E) at all times (immediately, 14 days later, and 28 days later) was statistically significant between all groups (p < 0.05). The degree of color change decreased in the following order: AH26 > Zn-nano > Zn.Cu-nano > novel nano-zinc/copper material > MTA Base (Maruchi) > control group. CONCLUSION: The results of the present study showed that sealers with a zinc base (Zn-nano and Zn.Cu-nanoparticles) had an appropriate color change. Therefore, they can be used alongside other sealers available in the market.