Two things to consider: 1.
Are you still numb from the anesthesia
?, 2. Is it a tooth colored filling or an amalgam (silver colored) filling.
Obviously, you want the numbness
to be gone before eating, so you don't chew yourself instead of / in addition to your food. If the filling is amalgam. You should wait at least a few hours, and no hard chewing for 24 hours. If unsure, ask your dentist.
...Ask Dr. John Thaler now ›