Numbness after a dental visit can vary from 1-6 hours depending on the type of numbing medication given. Most commonly Lidocaine or Articaine is given, which typically lasts 2-3 from when it was given. Your dentist may have given you a long acting numbing like Bupivicaine if you had dental surgery, in which case you may have numbness 6-12 hours from when it was first given. Numbness that lasts longer than 18-24 hours after a dental procedure is not typically normal and you should reach out to your dentist if this occurs.