You can't make this stuff up...

So I took Trudy and the tooth to the vet yesterday and the vet said...she doesn't think it's Trudy's tooth.  
There is a spot where one is missing, and one too many on the other side, but she doesn't know if Trudy ever even had one in that spot.
No issues with her gums or teeth otherwise so we decided not to do an X-ray.
Kind of creepy :-)