US Patent 7329259 Articulating spinal implant

Disclosed are methods and devices for accessing and treating the spine, while minimizing trauma to surrounding tissue. A device is introduced through tissue, to an access point on the spine. The device is thereafter advanced axially within the spine, from the access point across a treatment zone. In one embodiment, the device comprises an articulating spinal implant comprising a first elongate segment, a second elongate segment, and an articulating joint between the first and second segments.