Tooth fracture - pulp exposed?

I noticed a couple of days ago that my dogs K9 is fractured, so went to the vet the same day. They said the pulp is exposed and tooth needs to be either extracted or saved via root cana, seal. We haven’t noticed any behaviour change, she still enjoys chewing hard things with this tooth and when I touch it with my finger she doesn’t mind. My uncle who’s a vet and dentist (for humans!) but not in the country so has only seen pictures said he can’t tell if the pulp is open 100% and we need to make sure it’s open before we should do anything with the priority of saving the tooth. Any recommendations? Can you tell if the pulp is open from the pics? Is my dog in pain?