F1 facet fracture [Neurosurgery Wiki]

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====== F1 facet fracture ======


F1 is a non-displaced [[facet fracture]] (either superior or inferior cervical [[facet]]s) from the [[AOSpine subaxial cervical spine injury classification system]]. Fracture fragments are smaller than 1 cm and comprise less than 40% of the lateral mass.

{{::facet_injury.jpg|}}

There was significant variability in [[diagnostic accuracy]] for F1 [[facet fracture]] through F3-type fractures, whereas almost universal agreement was achieved for F4-type injuries
((Cabrera JP, Yurac R, Guiroy A, Joaquim AF, Carazzo CA, Zamorano JJ, White KP, Valacco M; and the AO Spine Latin America Trauma Study Group. Accuracy and reliability of the [[AOSpine subaxial cervical spine injury classification system]] grading subaxial [[cervical facet injury]] morphology. Eur Spine J. 2021 Apr 11. doi: 10.1007/s00586-021-06837-w. Epub ahead of print. PMID: 33842992.)).