RCT done one week ago. Radiopacity at the apex and a radiolucency between the temporary filling material and the gutta-percha. What is the radiolucency between the filling and the gutta-percha?

Correct answer: D. Cotton pellet

• A. An air void could theoretically appear radiolucent but is not the specific answer identified in this clinical scenario.
• B. The radiopacity AT THE APEX is identified as sealer in this case — not the radiolucency between the filling and gutta-percha.
• C. There is no indication of new caries in this recently treated tooth at this specific location.
• D. Correct, per the case. A cotton pellet is commonly placed over the gutta-percha/orifice beneath a temporary restoration, and appears as a radiolucent layer between the temporary material and the gutta-percha.

Note: The radiopacity at the apex is the sealer. Definitive treatment for this tooth: a permanent crown.