[spidey]

He will need antibiotics even if you have it extracted, to ward off any infection he's already developed. But I would find another vet if yours doesn't want to extract it if the pulp is exposed, it is standard modern care to extract a broken baby tooth if the pulp is exposed, and by not doing so, you are risking both the puppy's health, and the adult tooth. I also didn't initially want to extract my puppy's broken baby premolar, but I did my homework and changed my mind (and I now work for the vet who did the extraction).