You should not wait too long to see a dentist if you lose a filling. Although it is not technically a dental emergency, it could become one because the crown without a filling is weakened, and the dentin of the tooth is exposed to the air and bacteria of the mouth. Here are some things to do if you lose a filling:
*Clove oil applied to the location of the lost filling may provide some pain relief
*Clean the crown and see if it will fit back onto your tooth
*If you have lost the crown, temporary dental cement can help protect the tooth until you can see a dentist
Your dentist will remove any additional decay and put in a new filling.
More Answers from De Vizio, DMD