外傷性軸椎すべり症―Ｈａｎｇｍａｎ骨折―の治療経験

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  • Treatment of Traumatic Spondylolisthesis of the Axis-hangman's fracture.

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説明

We experienced 6 cases of traumatic spondylolisthesis of the axis, so-called hamgmas's fracture, over a six year Period. This fracture is usually considered to be caused by an exten sion injury, however, two of our cases appeared, to be due to a flexion injury. The mechaninsm of injury needs to be taken into consideration when deciding on the type of treatment, although, in general this fracture is treated conservatively. According to Levine's classification, type I and type II fractures can be treated by skeletal traction. However traction is contraindicated for type IIa fractures, and these should be treated by the application of an extensive-compressive force using a halo vest. Such cases as type III fractures and any remaining remarkable kyphosis or instability, require operative treatment.

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