Which of the following is NOT typically assessed on a post-obturation radiograph?

• A. Length of obturation relative to apex
• B. Density and homogeneity of fill
• C. Presence of voids
• D. Tooth color

Answer: (D)

Post-obturation radiographs are used to verify the technical quality of the root canal filling by showing how close the filling comes to the apex, how dense and uniform the fill is, and whether there are any voids within the material or at the canal walls. These are radiographic features that reflect the internal sealing and integrity of the obturation. Tooth color, on the other hand, is an external esthetic characteristic and cannot be assessed reliably on a radiograph. Radiographs reveal density and gaps inside the tooth, not its surface color, so color is not typically evaluated in post-obturation imaging.