What should be done when a dark stain is found on a composite restoration during examination?

When a dark stain is found on a composite restoration during examination, the appropriate course of action is to replace the composite. This approach is based on several important considerations regarding dental materials and restorative dentistry.

The presence of a dark stain could indicate that there is a problem with the underlying restoration itself, such as discoloration due to degradation of the material or degradation of the bond with the tooth structure. Stains can be much more than surface-level discoloration; they may signify that the composite is failing or has been compromised, which could eventually lead to further issues like decay underneath the restoration.

Replacing the composite ensures that any potential issues beneath the surface are addressed, restoring both the aesthetics and functionality of the restoration. This step is critical not only for patient satisfaction regarding the appearance of their smile but also for the integrity and health of the tooth being restored.

In contrast, other options such as repairing with unfilled resin or applying topical fluoride would not adequately address the underlying problems associated with the dark stain. Polishing may improve the appearance temporarily but does not resolve any potential structural or bonding issues, which highlights the importance of assessing and possibly replacing the composite restoration in response to significant discoloration.