If tip back bend and toe of heavy labial wire were increased, the molar anchorage preparation can be produced, this is a active reinforced anchorage.

  • 若在颊侧管近中端给粗唇弓加弯末端内收弯及后倾曲,尚可使磨牙进行支抗预备,即起主动支抗加强效能。

  • 互联网摘选 2025-01-20 13:03:40

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