The present invention relates to a device for the distraction of the spinous processes of two adjacent vertebrae. The spinous processes of the two vertebrae are supported on two separated distraction means being attached to a central body which can be expanded in an infinitely variable manner. The central...http://www.google.fr/patents/US20080161818?utm_source=gb-gplus-shareBrevet US20080161818 - Spinous Process Distractor
