题目内容
根尖周脓肿后，脓液主要的自然引流途径是
2021-12-20
A.根管内—龋洞
B.骨髄腔—面部间隙—皮下
C.根尖周—骨膜下—黏膜下
D.根尖周—骨髓腔—鼻腔
E.根尖周―骨髄腔—上颂窦
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