Over time, adjusting the denture may be necessary. As you age, your mouth naturally changes, which can affect the fit of the denture. Your bone and gum ridges can recede or shrink, resulting in a loose-fitting denture. Loose dentures can cause various problems, including sores or infections. Dentures that do not fit properly can be adjusted. Avoid using a do-it-yourself kit to adjust your dentures, as this can damage the appliance beyond repair. Glues sold over-the-counter often contain harmful chemicals and should not be used on a denture.

If your denture no longer fits properly, if it breaks, cracks or chips, or if one of the teeth becomes loose, see your dentist immediately. In many cases, dentists can make necessary adjustments or repairs, often on the same day. Complicated repairs may require that the denture be sent to a special dental laboratory.

Over time, dentures will need to be relined, re-based, or re-made due to normal wear. To reline or re-base a denture, the dentist uses the existing denture teeth and refits the denture base or makes a new denture base. Dentures may need to be replaced if they become loose and the teeth show signs of significant wear.