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': 'If full coronal restoration of mandibular incisors is necessary, it requires the use of a: \nSelect and explain. \nA. Maxillary central crown form, B. Maxillary lateral crown form, C. Maxillary canine crown form, D. Mandibular lateral crown form', 'role': 'user'}, {'content': 'Answer: B \nExplanation: No crown forms are available that are made speciﬁcally for mandibular\xa0incisors.\nIf full coronal restoration of mandibular incisors is necessary, it requires the use of a maxillary lateral crown form.', 'role': 'assistant'}]