Broke tooth eating Kellogg's Frosted Flakes

The good news is that you kept the evidence and regardless of where you are from, you can sue for just about anything in the United States.  I suggest keeping track of all the destist bills and send a letter, certified mail, to the corporation explaining what happened.  If you do not hear back from the corporation within 2 weeks, i would hire a lawyer to sue for negligence, among other things as the corporation certainly has a duty of care to ensure that the flakes are etable and not going to cause damages to peope who eat them.  You should be entitled to reimbursment of your medical expenses as well as any pain/suffering.  Do not lose the evidence!