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6Treatment - implant retention or removal

Mistakes in pin insertion for external fixation

Mistakes in pin insertion for external fixation are:

  • Drilling at excessive speeds or with a blunt drill bit (A), producing thermal necrosis of bone.
  • Insertion of the Schanz screws, or pins, without adequate pre-drilling (B) causing microfractures, as well as excessive heat, which results in small necrotic bone fragments, or ring sequestra.
  • Correct pre-drilling and correct pin/screw insertion (C) minimize the risk of pin tract infection.