A.上頜第一磨牙牙冠相對(duì)的頰黏膜
B.上頜第二磨牙牙冠相對(duì)的頰黏膜
C.上頜第三磨牙牙冠相對(duì)的頰黏膜
D.上頜第一前磨牙牙冠相對(duì)的頰黏膜
E.上頜第二前磨牙牙冠相對(duì)的頰黏膜

A.頰神經(jīng)、腭后神經(jīng)
B.上牙槽中神經(jīng)、腭后神經(jīng)
C.上牙槽后神經(jīng)、腭前神經(jīng)
D.上牙槽中神經(jīng)、腭前神經(jīng)
E.上牙槽后神經(jīng)、頰神經(jīng)

A.鼻腭神經(jīng)和腭前神經(jīng)
B.腭前神經(jīng)和上牙槽前神經(jīng)
C.鼻腭神經(jīng)和上牙槽前神經(jīng)
D.腭前神經(jīng)和眶下神經(jīng)
E.眶下神經(jīng)和上牙槽前神經(jīng)

A.翼外肌
B.翼內(nèi)肌
C.顳肌
D.咬肌
E.咽上縮肌

A.消除早接觸點(diǎn)
B.減少牙周組織所受的側(cè)向力
C.降低臨床牙冠長(zhǎng)度
D.避免前牙因后牙推動(dòng)而擁擠
E.減小深覆蓋程度