This device comprises two vertebral assemblies designed to be fixed respectively to the bone of two different vertebrae. In order to guide the vertebrae effectively and in a stable manner for reproducing an intervertebral articular connection, rigid means connect the two vertebral assemblies to one another...http://www.google.de/patents/US20070162002?utm_source=gb-gplus-sharePatent US20070162002 - Device for stabilizing the spine
