题目内容
牙震荡是指
2021-12-20
A.牙周膜轻度损伤，不伴牙体缺损
B.牙周膜轻度损伤，伴有牙体缺损
C.牙周膜重度撕裂，不伴牙体缺损
D.牙周膜重度撕裂，伴有牙体缺损
E.仅有根尖周膜的损伤
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