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': 'Babu, a 7½ years old child, reports with a fracture of\ncentral incisor with an open apex, there is large pulpal\nexposure. The treatment of choice is: \nSelect and explain. \nA. Smooth the edges and protect the exposed portion with ZOE dressing, B. Pulpectomy and calcium hydroxide dressing, C. Pulpotomy and calcium hydroxide dressing, D. Direct pulp capping and calcium hydroxide dressing', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The Cvek Pulpotomy on Immature Permanent Teeth\nPulpotomy is an established technique for preserving vital pulp functions in immature teeth that have been subject to pulp-exposing\xa0trauma. Inflammation is confined to the surface 2 to 3\xa0mm of the pulp, when it is traumatically exposed and left untreated for up to 168 hours.\xa0\nIn a classic report, Cvek described a pulpotomy technique in which only the superficial 2 to 3 mm of hyperplastic inflamed tissue was removed with a water-cooled, high-speed diamond bur to place the wound in a healthy site. Hemostasis was then secured before capping with an appropriate material.\xa0\nHemostasis was obtained with saline, and a pulp cap of calcium hydroxide was overlaid with a sealing coronal restoration.\nReference: Cohen Pathways of Pulp 11th ed page no e31', 'role': 'assistant'}]