Fig. 1

No.1 patient (a) Preoperative scanning revealed long segment comminuted fractures in 3 and 4 ribs. b Preoperative 3 and 4 rib models were prepared by 3D printing technology based on CT thin slice scanning. c, d Reduction fracture morphology; the 3D printing model was spliced and the titanium alloy rib locking plate was shaped according to the mode. e Postoperative review, the shape of the internal fixator was intact, and the shape of the contralateral rib was perfectly symmetrical compared with preoperative image A