Fig. 3

a The images of AO type13C3 distal humeru fracture. b–c The lateral window and the medial window of the fracture site. d–g First, the medial and lateral condyles fracture fragments were turned 180° through the two-window space, using the collateral ligament as the axis, respectively. Then, the comminuted condyles fracture fragments were anatomically fixed under direct visualization, using a 1.0 mm K-wire for a small fragment or a 2.7 mm screw for a bigger fragment. Finally, the medial and lateral condyles of the humerus were turned back toward the bottom of the triceps muscle and matched with olecranon, and fixed to the humerus shaft