Replantation of severed fingers depends on the development of microsurgery technology. Replantation of severed fingers is not simply splicing meat, but reconnecting nerves, blood vessels, tendons and bones. Among them, the most basic is blood vessels. Only by restoring blood supply and replanting can the severed limb survive and the operation be successful. Otherwise, it will still be ischemic necrosis and face amputation. Not only fingers, arms and other larger limbs can be replanted with this. I hope this helps.