New cosmic rule suggestion: Any tooth that has had a root canal and a crown is not allowed any more problems. Ever.
Auxiliary rule: Pharmacists should not go to lunch mid-afternoon and their helper people should feel guilty when told you cannot wait 45 minutes for the antibiotics and you have to pick it up tomorrow so my infection can just rage on another 12 hours or so, not have a happy face that you are leaving!
Tertiary rule: Nobody wants to call an oral surgeon's office, so when your message says my call is important to you, and you will call me back, do so. Don't make me call 45 minutes later to hear that you are closed for the day.