Is it safe to re-glue a veneer which has fallen off using denture adhesive cream?

No, it is not safe to use denture adhesive cream to re-glue veneer. Denture adhesive cream is not an appropriate material for this type of repair, as it is not designed for long-term adhesion or for use in the oral cavity. Moreover, denture adhesive cream is not a biocompatible material and may cause irritation or allergic reactions in the mouth.

Repairing a fallen-off veneer requires proper dental treatment, such as re-bonding by a qualified dentist or prosthodontist. They can assess the cause of the veneer's failure, clean and prepare the tooth and veneer surfaces, and re-attach the veneer with an appropriate dental adhesive. Self-repair attempts using household adhesives or inappropriate materials can lead to further damage to the tooth or surrounding tissues and compromise oral health.