Baby teeth that have large caries (cavities) and some degree of pain occasionally require that the 'coronal' (top) portion of that tooth's nerve be removed before a filling or a crown (preferably) is placed. The main goal of this procedure is to preserve the baby tooth, since baby teeth help to maintain adequate room for the permanent teeth. Pulpotomies have published success rates that range from 60% to 90% and represent a good and reliable way to save a badly decayed baby tooth.