An external fixator is a metal apparatus to hold together the broken ends of a bone via rods drilled through the skin into the bone.
Distraction screws also allow the healing bone to be slowly pulled apart so that the length and angulation can be improved.
Comparision of Ilizarov Ring Fixator and Rail Fixator in Infected Nonunion of Long Bones: A Retrospective Followup Study. Bhardwaj R, Singh J, Kapila R and Boparai RS. Indian J Orthop. 2019 Jan-Feb; 53(1): 82–88.