(来学网)烤瓷熔附金属全冠前牙牙体预备时,切缘应该预备出的间隙
  • A.
    (来学网)1.0~1.2mm
  • B.
    (来学网)1.2~1.5mm
  • C.
    (来学网)1.5~2.0mm
  • D.
    (来学网)1.8~2.2mm
  • E.
    (来学网)2.0~2.5mm