Adjacent Segment Mobility After Rigid and Semirigid Instrumentation of the Lumbar Spine.

The article presents a study which evaluates the segmental range of motion (ROM) of lumbar spine at the index and adjacent levels after rigid and semirigid instrumentation using the Dynamic Neutralization System Dynesys. The study involves 26 degenerative instability-induced low back pain and claudication patients who underwent pre-operative ant latest follow-up flexion/extension radiographs. It concludes that ROM is not altered by instrumentations associated with Dynesys.