Laminectomy contributes to cervical spine deformity demonstrated by holographic interferometry. J Spinal Disord Tech 2003 Feb;16(1):51-4
Date
02/07/2003Pubmed ID
12571485DOI
10.1097/00024720-200302000-00009Scopus ID
2-s2.0-0037316743 (requires institutional sign-in at Scopus site) 8 CitationsAbstract
Multiple factors contribute to the pathogenesis of postlaminectomy deformity and instability of the cervical spine. The complex alterations in both static and dynamic biomechanics after laminectomy are incompletely defined. We sought to examine the role of the lamina in compressive load bearing across the vertebral body. Holographic interferometry was used to study the surface deformation of single axially loaded cervical vertebral bodies before and after hemilaminotomy, hemilaminectomy, and experimental acrylic laminar reconstruction. Our results showed that hemilaminotomy did not alter the surface deformation because of axial loading across the cervical vertebral body. However, gross alterations in surface deformation across the cervical vertebral body were consistently observed after hemilaminectomy. Experimental reconstruction of the laminar arch using acrylic restored the deformation pattern to the prelaminectomized baseline. Our results support a role for the lamina and the integrity of the laminar arch in axial load bearing across the cervical vertebral body. The altered axial load bearing may be a significant contributor to postlaminectomy deformity and instability. These findings offer an additional biomechanical advantage to minimal bony intervention for cervical spine pathology.
Author List
Ozgur BM, Florman JE, Lew SM, Taylor WP, Gross CAuthor
Sean Lew MD Chief, Professor in the Neurosurgery department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Acrylic ResinsAdult
Bone Substitutes
Cadaver
Cervical Vertebrae
Elasticity
Holography
Humans
Interferometry
Laminectomy
Stress, Mechanical
Weight-Bearing
