题目内容
上颌切牙开髓时,应由舌面窝向颈部方位钻入的原因是
2021-11-10
A.近-远中径近切崎处髓腔最宽
B.横切面髓腔呈圆三角形
C.横切面髓腔唇侧比舌侧宽
D.在牙颈部附近髄腔唇-舌径最大
E.根管粗、直、根尖孔大
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