Fig. 2

Male, 34 years old, falling caused left elbow injury. A Preoperative X-rays. B CT scan showed olecranon fracture and elbow posterior dislocation. C CT scan showed proximal radioulnar joint stable. D For better surgical guidance, we printed a 3D model, the olecranon fracture fragment is shown in black, the radial head fracture fragment in orange, and the coronoid process fracture fragment in blue. E Posterior midline approach was used, and the proximal olecranon fragment was identified and turned over. Coronoid process fragment and radial head fragment can be visualized due to the absence of olecranon obstruction. After the reduction and fixation of coronoid process and radius head, the olecranon fragments were also reduced and fixed. Finally, the lateral collateral ligament complex was examined and repaired if it was ruptured. F Intraoperative fluoroscopy. G Postoperative X-rays. H X-rays after surgery 6 months. I X-rays after surgery 1 year. J The functional assessment at last follow-up