A.上頜前磨牙的牙冠靠近牙體長(zhǎng)軸頰側(cè) B.下頜前磨牙的牙冠略偏牙體長(zhǎng)軸頰側(cè) C.下頜前磨牙的牙冠方圓 D.上頜前磨牙的牙冠較窄長(zhǎng) E.下頜前磨牙多為扁圓單根
A.根尖頂 B.根尖唇側(cè) C.根尖舌側(cè) D.根尖近中側(cè) E.根尖遠(yuǎn)中側(cè)
A.鼻腭神經(jīng)+腭前神經(jīng)+上牙槽前神經(jīng) B.上牙槽后神經(jīng)+腭前神經(jīng) C.下牙槽神經(jīng)+舌神經(jīng) D.上牙槽中神經(jīng)+上牙槽后神經(jīng)+腭前神經(jīng) E.下牙槽神經(jīng)+舌神經(jīng)+頰長(zhǎng)神經(jīng)拔除下列牙時(shí)應(yīng)麻醉哪組神經(jīng)