Objective To investigate the role of artificial disc replacement (ADR) in restoring lumbar segment motion and intervertebral height (IH).

Curtiss-Wright's Motion Control segment will provide the equipment from its Embedded Computing facility in Trondheim, Norway, over the next year.

Study Design. Biomechanical roles of anterior and posterior portions of the disc (AD and PD, respectively) in governing posterior facets (PF) behavior of a C5-C6 motion segment.