What procedure should not be performed if a denture base is broken?

When a denture base is broken, immediate re-cementing is not advisable because it does not address the underlying issue of the fracture. Re-cementing a broken base can lead to further complications, including discomfort, improper fit, and additional damage to the denture. Instead, it is important to properly assess the damage and consider other options like temporary relining or adjustments that can accommodate the patient's needs without exacerbating the situation.

Temporary relining can help improve fit while you wait for a more permanent solution, and adjusting the bite can alleviate discomfort caused by the broken base. The broken denture should be repaired properly before any re-cementing is considered, ensuring that the denture will function effectively and comfortably for the patient.