seethe dentist who removed the tooth or an oral surgeon.
The bony protrusion cannot be moved. It is as if the hole extends out toward the cheek.
if it can be moved, it is most likely a bone spicule or small sliver of tooth that may have chipped off during the extraction. It should be pushed up and out during the healing process. If you think it's intact bone poking through, see the dentist who did the extraction.
It is probably from the expansion of the bone during the extraction and should be looked at.