Table of Contents
ISRN Orthopedics
Volume 2011, Article ID 637185, 7 pages
Review Article

Two Types of Laminoplasty for Cervical Spondylotic Myelopathy at Multiple Levels

Department of Orthopaedic Surgery, Teikyo University Hospital, 11-1, Kaga-2-Chome, Itabashi, Tokyo 173-8605, Japan

Received 2 June 2011; Accepted 10 July 2011

Academic Editors: D. H. Clements, A. F. Ozer, and H. Yuan

Copyright © 2011 Shigeru Hirabayashi and Takashi Matsushita. 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.


Based on the results from pathological analysis and computer simulations by means of finite element analysis that were reported before, the pathological changes of cervical spondylotic myelopathy (CSM) seem to begin at the posterolateral parts of the spinal cord, because the mechanical stress is mainly concentrated in these parts. With progression of the compression, the pathological changes become distributed to a wider area of the spinal cord. In patients with spinal canal stenosis, these changes spread to multiple levels of the cervical spine. Therefore, posterior decompression surgery at multiple levels such as cervical laminoplasty is thought to be reasonable.