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Related to Jefferson fracture: teardrop fracture, odontoid fracture, Chance fracture, clay shoveler's fracture, hangman's fracture
C1 fractureA fracture which occurs with axial loading or axial loading + neck flexion, extension, lateral bending or axial rotation.
C1F victims either die at the scene or present without neurologic deficit—e.g., neck stiffness, limited neck movement, suboccipital pain, muscle spasm, headache.
Open-mouth odontoid views may show displacement of the lateral masses and are more useful than lateral views. Up to 25% of C1 fractures are missed on plain radiographs; a CT provides detailed visualisation of fracture(s).
C1Fs are most common in the 2nd decade of life with a 2:1 male:female ratio, account for 4–15% of all cervical fractures and linked to MVAs/RTAs and falls; 40% are associated with C2 injuries.
Types of C1Fs
Posterior arch fracture, Jefferson fracture.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Jefferson fractureBurst of the ring Orthopedics A burst fracture of C1 caused by an axial load to vertex of the head; because C1 fragments are displaced laterally, direct injury to the spinal cord is rare Management Nondisplaced–collar or SOMI; displaced < 7 mm–collar or halo; displaced > 7 mm–halo or obtain an MRI; if transverse atlantal ligament is disrupted, fusion may be needed. See C1 fracture.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
Jef·fer·son frac·ture(jef'ĕr-sŏn frak'shŭr)
Fracture of the atlas, usually due to compressive trauma.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012