题目内容
上、下颌磨牙形态区别中，不正确的是
2022-02-18
A.上颌磨牙的牙冠较直
B.上领磨牙的牙冠呈斜方形
C.下领磨牙的牙冠倾向舌侧
D.上颁磨牙颊尖钝而舌尖锐
E.下颌磨牙一般为双根
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