Doe. I can tell you that those top teeth are definatly diffrent on this bear minus the k9's as said in past posts; however there is little chance that the skull is from a diffrent bear. Knowing that it is not one of my skulls I can say, overall this year I have worked on over 20 bear heads, and some times teeth do get mixed up, and yes teeth do fit in diffrent skulls. You do have to remember that the Taxidermist/skull cleaner has only one reference of the skull and that is with meat, and gum tissue before it is put in the beetles, or maserated, so unless they are strictly seperated they can be mixed up. I highly dought the individual that cleaned this skull purposely did this, but it does happen Im sure I am guilty of it unknowingly. I would contact the Taxidermist, and ask if it is possible that teeth may have gotten mix up, and possible he has the originals. The skull is well clean and to me JUST MY OPINION would not be bothered by it. Hope this helps.