A dynamic device for implantation within a disc space between two adjacent
vertebral bodies is disclosed. The device comprises two or more bodies
interconnected via at least one connecting means such that at least one
body is permitted relative motion with respect to the at least one other
body. The device is configured to assume various configurations including
a first configuration suitable for minimally invasive insertion and a
second configuration suitable for residence within the disc space.
Associated variations and insertion instruments are also disclosed.