Remember: You can do serious harm to your denture and to your health by trying to adjust or repair your denture. Using a do-it-yourself kit 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 breaks, cracks or chips, or if one of the teeth becomes loose, call your dentist immediately. In many cases, our 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.