When bone fragments unite in the wrong position (Figs. 15.1, 15.2, 15.3 and 15.4), the advantages of external fixation with respect to both the possibility of gradual elimination of the soft-tissue retraction and the preservation of the interfragmentary regenerate are clear. Depending on the degree of maturity, the mechanical stability, and the type of fragment displacement, various frame configurations and rates of repositioning are applied.