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Posterior Dynamic Stabilization
Book chapter

Posterior Dynamic Stabilization

Dorian Kusyk, Chen Xu, Donald M. Whiting and Domagoj Coric
Handbook of Spine Technology, pp 893-898
01 Jan 2021

Abstract

Dynesys Fusion biomechanics Graf ligament Neutral zone Posterior dynamic stabilization
Posterior dynamic stabilization (PDS) systems arose with the promise of stability without fixation. In particular, these systems address the two prevailing models of spinal biomechanics – the Panjabi model of the Neutral Zone and Mulholland-Segupta theory of abnormal load transmission. By both limiting the range of motion of the diseased level and off-loading the disc space of some axial stress, PDS systems hope to treat back pain while preserving motion. However, these design constraints post a significant design challenge, as demonstrated by the multiple models that have been visited over the years. Though a successful PDS system has yet to emerge, surgeons have found other ways to use the technology, including as an adjunct to improve fusion rates when paired with interbody devices.

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