"type 1: fractures of the anterior arch"
"type 2: fractures of the posterior arch (usually bilateral)"
"type 3: fractures involving the anterior and posterior arch (Jefferson burst fracture)"
"type 3a: intact transverse atlantal ligament"
"type 3b: disrupted transverse atlantal ligament complex"
"Dickman type 1: ligamentous disruption"
"Dickman type 2: bony avulsion with an intact transverse atlantal ligament"
"type 4: fractures of the lateral mass"
"type 5: isolated fractures of the C1 transverse process (rare)"
"The Gehweiler classification is in common use along with the AO Spine classification of upper cervical injuries and Landells classification (c. 2022) 5,6."
"Dickman type 1: ligamentous disruption"
"Dickman type 2: bony avulsion with an intact transverse atlantal ligament"
"The system is named after John A Gehweiler, Jr, an American radiologist who described the sites of atlas fractures with colleagues from Duke University in 1976 in the journal Skeletal Radiology but the order was changed in later publications 4. The Gehweiler classification was modified by incorporating assessment of transverse atlantal ligament integrity, which was published by Dickman et al. in 1996 5."
"History and etymology"