题目内容
患儿,10岁,半个月以来右下后牙自发痛,持续痛, 不能咬物2日。检查:
萌出2/3,无龋,叩痛(+ + ),松II度,牙龈红肿。x线示髓角尖细,根发育畸 形。病因可能是
2022-03-29
A.磨耗
B.隐裂
C.创伤
D.畸形中央尖折断
E.逆行性感染
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