A spinal joint distraction system is disclosed and may include a delivery device, a driver assembly, and an internal actuator, where the driver assembly is adapted to be hold an implant and be sleevably inserted into the delivery device and the internal actuator is adapted to advance an implant distractor...http://www.google.fr/patents/US20090312763?utm_source=gb-gplus-shareBrevet US20090312763 - Facet joint implants and delivery tools
