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Elastic resistance of the spine: Why does motion preservation surgery almost fail?
Alessandro Landi, Department of Neurology and Psychiatry, Division of Neurosurgery, University of Rome “Sapienza”, 00181 Rome, Italy
Author contributions: Landi A solely contributed to this paper.
Correspondence to: Alessandro Landi, MD, PhD, Department of Neurology and Psychiatry, Division of Neurosurgery, University of Rome Sapienza, Viale del Policlinico 155, 00181 Rome, Italy. email@example.com
Telephone: +39-329-0641772 Fax: +39-06-4997911
Received: February 22, 2013 Revised: June 5, 2013 Accepted: June 8, 2013 Published online: July 16, 2013
Core tip: Elastic resistance of the spinal motor unit is a biomechanical property often underestimated but crucial for the stability of the spine. The biomechanics of dynamic implants take into account only the motility of the devices and not the elastic resistance. Is it possible that this is the reason why dynamic implants almost fail?