• Ricardo Fernández-Fernández, Pablo Diaz-Freire, and Juan C Rubio-Suárez.
• Department of traumatology and orthopaedic surgery La Paz University Hospital Madrid (Spain). Electronic address: rfdezfdez@yahoo.com.
• Injury. 2021 Jul 1; 52 Suppl 4: S22-S26.

AimsTo evaluate clinical and radiological results of vertically unstable pelvic fractures managed by open reduction and navigated iliosacral screws.Patients And MethodsThe study included eleven patients with complex posterior ring fractures with vertical instability admitted to our hospital and managed with CT navigated iliosacral screws. There were 7 type C1, 2 C2 and 2 C3, according to Tile classification. Three patients presented a spino-pelvic dissociation and four a vertical sacral fracture affecting the foramina (Denis 2). Vertical displacement, pelvic deformity and asymmetry were measured. Tornetta and Matta criteria were used to assess the quality of pelvic reduction.ResultsAn excellent reduction was achieved in 9 fractures and a good reduction in two. Asymmetry index improved from 13.18 to 2.72. Deformity index improved from 0.049 to 0.010. Only two patients with a Denis 2 fracture showed secondary displacement during follow-up. Four patients presented neurological complications due to their initial injuries. Seven patients were able to resume their previous activities.ConclusionCT navigated IS screws provide enough stability after an anatomic reduction of the fracture. There was no complication related to screw insertion and adequate screw positioning was achieved in all the cases.Copyright © 2021. Published by Elsevier Ltd.

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