Wolfsoul-
I had a female shepherd that went over a 6 foot high fence and landed on her face. She broke the root of one of her canines. The vet said to remove because with root damage this could later cause her pain or abcess or loose the tooth to decay- affecting the roots around the surrounding teeth. I was told at the time the only time they remove a tooth is if the tooth is damaged beyond the doubt of causing problems later, or if there is not enough of the tooth left. Good luck and keep us posted with what the vet says.