Fillings are materials used to fill cavities in the teeth. Crowns cover the tops of damaged teeth.
Sometimes fillings or crowns fall out. In some cases, a filling or crown may come loose because there is decay underneath it. The decay destroys part of the tooth, so it no longer has a tight hold on the crown or filling.
Decay may have changed the shape of your tooth. Usually, this means that your dentist will need to prepare the tooth again to ensure the new crown will fit. If the crown does not fit securely, it will come off again. If the old crown fits well, it will be recemented once the dentist makes sure that the tooth surface is intact and fit to ‘’glue’’ again. If not, a new crown may have to be fabricated.
If you lose a filling, your dentist will remove the decay that developed between the old filling and the tooth and place a new filling.