Pulpotomy refers to coronal removal of the vital pulp tissue. In a tooth there is the crown part and the root part. In the crown part there is coronal pulp and in root there is root pulp. Sometimes the cavity is deep but the pulp is not infected or there is pinpoint exposure but infection is not there. In such cases it is recommended to remove the coronal pulp and save the root pulp. In this way the vitality of the tooth is maintained, the tooth lives on and sheds naturally.
Sometimes in case of abscessed tooth, total pulpal removal is recommended. In baby tooth, this is known as pulpectomy. Material used to fill the pulp chamber and canal resorbs as the tooth melts into shedding.