Abstract:Hangman's fracture in ventrally flexed traction between 10(6) and 75 degrees is analyzed on the basis of 220 fracture trials on plaster of real bone preparations of the atlas and axis of two adults. Hangman's fractures, which are usually regarded as a form of injury from dorsal flexion, occurred in 25% of the fracture trials under this kind of strain. Frequency depended on flexion angle, as well as on inclination of the dens axis. Thus Hangman's fractures occurred, as a whole, more frequently in the kyphotic d… Show more
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