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Advances in Orthopedics
Volume 2013 (2013), Article ID 451956, 6 pages
Review Article

Biomechanics of Posterior Dynamic Stabilization Systems

1Department of Neurosurgery, School of Medicine, Koc University, Rumelifeneri Yolu, 34450 Istanbul, Turkey
2Department of Mechanical Engineering, Colleges of Engineering, Koc University, Rumelifeneri Yolu, 34450 Istanbul, Turkey
3Departments of Bioengineering and Orthopaedic Surgery, Engineering Center for Orthopaedic Research Excellence (E-CORE), Colleges of Engineering and Medicine, University of Toledo, Toledo, OH 43606, USA

Received 30 November 2012; Accepted 21 February 2013

Academic Editor: Tunc Oktenoglu

Copyright © 2013 D. U. Erbulut et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Spinal rigid instrumentations have been used to fuse and stabilize spinal segments as a surgical treatment for various spinal disorders to date. This technology provides immediate stability after surgery until the natural fusion mass develops. At present, rigid fixation is the current gold standard in surgical treatment of chronic back pain spinal disorders. However, such systems have several drawbacks such as higher mechanical stress on the adjacent segment, leading to long-term degenerative changes and hypermobility that often necessitate additional fusion surgery. Dynamic stabilization systems have been suggested to address adjacent segment degeneration, which is considered to be a fusion-associated phenomenon. Dynamic stabilization systems are designed to preserve segmental stability, to keep the treated segment mobile, and to reduce or eliminate degenerative effects on adjacent segments. This paper aimed to describe the biomechanical aspect of dynamic stabilization systems as an alternative treatment to fusion for certain patients.