Rabbit incisors removed, peg tooth keeps growing back!

Question
I've had my male rabbit for going on two years. He was abandoned in the parking lot of my apartment building when a family moved out. A little over a year ago, he had an altercation with my dog that broke one of his incisors. His vet thought it best to remove all incisors because the broken tooth, as it grew, was not growing straight. After the surgery, one of the peg teeth grew back! He had a second procedure to destroy the tooth bud, but a few weeks after that it grew back AGAIN. It would grow in for several weeks, and then fall out. After maybe two or three weeks, it would start to grow back again and repeat the process. It didn't seem to bother him much except for when he was "teething", so to speak. About a month ago I took him back to the vet when the tooth was nearing the point where it would fall out, and they pulled it and went in through the cavity where the tooth was and tried to destroy the bud again. But two weeks ago it came back again, and this time it's growing in very crooked and I'm afraid it will irritate my bunny's cheek as it grows.

So I guess my question is, what is my vet doing wrong? I don't want to keep putting my bunny through these procedures, but I also don't want him to have to deal with this tooth cutting through his gum every few weeks. What will it take to solve this once and for all? In general I've been happy with this vet, and they're the only exotic pet vet in town, so it's hard to get a second opinion. Any thoughts you have are very welcome, thanks!

Answer
Dear Jeannette,

It can be very difficult to kill the little bud of tissue at the base of the tooth that gives rise to new tooth, especially if it's the tiny one that grows the peg.  I'm sure your vet knows to push the tooth firmly into the bed before extracting it, as this can crush the progenitor cells that give rise to the tooth.

Please ask him about that.  But he may not be doing anything wrong.  It's sometimes just very difficult to hit that tiny bit of tissue, so he might need to gently wiggle the tooth around and push to make sure to get it all.

In the meantime, regular cutting of the peg with a Dremel (or a bone rongeur, to avoid splitting it) will keep it from irritating your bunny's mouth.

Dana