I suspect that the tooth didn't belong to the Loch Ness monster at all. Rather, I believe it to be sound evidence of a rare encounter with the mysterious "Mexican Biting Moose". They are more commonly found in Sweden (and none have been ever been actually seen in Mexico, but we know they're there...)
All the Mexican Biting Mooses in Sweden have been shipped off to extended vacations in Hawaii... seems the income from tourism to see them was disrupting the socialist economy.