What should be done if ditching is found in an amalgam filling?

If ditching is found in an amalgam filling, repairing the defect with unfilled resins is the most appropriate course of action. Ditching refers to the presence of a groove or depression at the margin of the restoration, which can serve as a plaque trap and lead to further degradation of the tooth structure or the filling itself. By using unfilled resins, you can properly seal the ditch, restore the contour, and protect against future decay. This approach ensures that the integrity of the tooth is maintained and reduces the likelihood of complications associated with ditching.

The other options may not effectively address the issue. While replacing the filling could be an option, it is typically considered a more invasive approach and may not be necessary if the defect can be repaired effectively. Leaving the filling as is would allow for potential deterioration and does not resolve the problem. Reassessing after a month without taking action may lead to further issues, as the existing defect would remain untreated, increasing the risk of decay or further deterioration over time.