(来学网)平面导板矫治器下前牙咬在导板上时后牙应离开
  • A.
    (来学网)1.5~2mm
  • B.
    (来学网)2~2.5mm
  • C.
    (来学网)2.5~3.5mm
  • D.
    (来学网)3~5mm
  • E.
    (来学网)5~6mm