This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Treatment for Ellis class III fracture of anterior tooth in a 12-year-old patient reported after 72 hours is: \nSelect and explain. \nA. Pulpotomy, B. Root canal treatment, C. Direct pulp capping, D. Indirect pulp capping', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A crown fracture involving the pulp, if left untreated, will\xa0always\xa0result\xa0in\xa0pulp\xa0necrosis. However,\xa0the\xa0manner and time sequence in which the pulp becomes necrotic allow a great deal of potential for successful intervention in maintaining pulp vitality.\nThe first reaction after an injury is hemorrhage and local inflammation. Subsequent inflammatory changes are usually proliferative, but can be destructive.\xa0It is\xa0expected\xa0that within\xa0the\xa0 first\xa024\xa0hours\xa0after\xa0the\xa0injury,\xa0a\xa0proliferative response with inflammation will extend no more than 2 mm into the pulp. In time, however, microbial infection will result in local pulp necrosis and a slow apical spread of pulpal inflammation.\nTreatment\nTreatment\xa0options\xa0are:\n(1) Vital\xa0pulp\xa0therapy\xa0comprising pulp capping, partial pulpotomy, and full pulpotomy, OR\n(2) Pulpectomy.\nThe choice of treatment depends on the stage of development of the tooth, the time between the accident and treatment, concomitant periodontal injury, and the restorative treatment plan.\nReference: Ingkke endodontic 7th ed page no 373', 'role': 'assistant'}]