(来学网)做瓷全冠修复时,为保证瓷冠的强度,切端应保持的最小瓷层厚度为
  • A.
    (来学网)3.1~3.5mm
  • B.
    (来学网)2.6~3mm
  • C.
    (来学网)2.1~2.5mm
  • D.
    (来学网)1.5~2mm
  • E.
    (来学网)1~1.4mm