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': 'What is the material of choice for a fresh furcation perforation of the \nsize of 2 mm? \nSelect and explain. \nA. Geristore, B. MTA, C. GIC, D. Amalgam', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Perforation in the furcation area has the poor prognosis. Perforation occurring in mid root and apical part of root does not have communication with oral cavity and thus has good prognosis.\nCommonly used materials for perforation repair include amalgam, calcium hydroxide, IRM, Super EBA, gutta-percha,MTA, and other materials tried for repair include dentin chips, hydroxyapatite, glass ionomer cements and plaster of Paris.\nFor perforation repair, hemostatics are needed to control the hemorrhage and make the area dry so that optimal placement of restorative material can be accomplished.\xa0\n\nKey notes\xa0\nMTA is ideal material with hemostatic and biocompatible property.\nTextbook of ENDODONTICS\nNISHA GARG 3rd edition.', 'role': 'assistant'}]