Figure 1From: Prophylactic titanium elastic nailing (TEN) following femoral lengthening (Lengthening then rodding) with one or two nails reduces the risk for secondary interventions after regenerate fractures: a cohort study in monolateral vs. bilateral lengthening procedures Radiographic appearance of the five types of callus shape in the Li classification [[12]: 1, fusiform; 2, cylindrical; 3, concave hourglass shape; 4, incomplete, only lateral; and 5, only central, filiform. Back to article page