题目内容
乳牙根尖周炎常出现瘘管的原因是
2021-12-22
A.儿童患龋率高,症状不明显
B.患儿不易合作,治疗不彻底
C.乳牙根分歧大,髄室底薄
D.病变进展快和牙槽骨疏松
E.牙龈上皮薄,角化差,固有层疏松
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