[Instability of the atlantodental joint as a trauma sequela]

In the region of the upper cervical spine a wide variety of morphological and functional positions is possible. This makes diagnosis and expert evaluation of whiplash injuries to the cervical spine very difficult. The problem is discussed with reference to a case report of a so-called whiplash injury. The upper cervical spine must be investigated in flexion and extension by means of MRT and/or CT as soon as possible.