30.製作可撤式局部金屬義齒支架(metal framework)時,下列何者不需平行封凹 (parallel blockout)?
(A)當作引導面(guiding plane)用之鄰接牙面
(B)小連接體(minor connector)所覆蓋的鄰接面
(C)固位鈎臂(retentive clasp arm)的倒凹(undercut)
(D)槓鈎(bar clasp)所經過的組織倒凹(undercut)
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統計: A(167), B(128), C(653), D(112), E(0) #2042147
統計: A(167), B(128), C(653), D(112), E(0) #2042147