Figure 2

Typical case 1: A 3.5-year-old boy with left missed Monteggia fracture. (A) Bado I type, ulna bow sign is located in the middle of ulna (group A). (B) In operation, reverse angulation is 24°, and radial head reduction is observed. (C) No dislocation of the radial head is found after the osteotomy is healed and the internal fixation is removed. (D) The elbow joint function is good after operation, no loss of rotation function.