Italians live by the rule of 15: 1  Use coffee beans within 15 days of roasting. 2  Use ground coffee within 15 minutes of grinding. 3  Drink coffee within 15 seconds of brewing.
The good news is that teeth (and bones) are able to heal themselves in a process called remineralization. Basically, specialized cells in the center of the tooth are able to regenerate dentin, the layer of tooth just under the enamel, and the enamel can then properly remineralize from the outside.
A American Dental Association answered. If you have a broken tooth, you need to steer clear of biting down on hard foods such as nuts or candy or things that are overly chewy. You may also notice that the affected area is sensitive to hot or cold, such as when you eat hot food and then drink a cold beverage.