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': 'Which of the following statement regarding trauma to primary teeth is false? \nSelect and explain. \nA. Lingually intruded primary tooth should not be removed, B. Intruded teeth re-erupt within 3-4 weeks after injury, C. Teeth with complete root formation undergo resorption more frequently, D. Teeth with incomplete root formation undergo resorption more rapidly', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Normally, the developing permanent incisor tooth bud lies lingual to the roots of the primary central\xa0incisors. Therefore, when an intrusive displacement occurs, the primary tooth usually remains labial to\xa0the developing permanent tooth.\xa0\nIf the intruded primary tooth is found to be in a lingual or\xa0encroaching relationship to the developing permanent tooth, it should be removed. Such a\xa0 relationship may be conﬁrmed from a lateral radiograph of the anterior segment.\xa0\nPrimary anterior teeth intruded as a result of a blow may often re-erupt within 3 to 4 weeks after the injury.\xa0\nTeeth with\xa0complete root formation seem to undergo resorption more frequently than those with incomplete\xa0root formation. However, when resorption did occur, it was more extensive and progressed more rapidly in teeth with incomplete root development.', 'role': 'assistant'}]