Effects of anterior vertebral grafting on the traumatized lumbar spine after pedicle screw-plate fixation. Spine (Phila Pa 1976) 1993 Dec;18(16):2423-30
Date
12/01/1993Pubmed ID
8303444DOI
10.1097/00007632-199312000-00010Scopus ID
2-s2.0-0027139189 (requires institutional sign-in at Scopus site) 41 CitationsAbstract
This study was conducted to determine the effects of corpectomy and anterior strut grafting on the biomechanics of traumatized lumbar spine after pedicle screw-plate fixation. Eight lumbar spines were loaded until fracture (initial cycle) and then reloaded to the same deformation (injury cycle). After transpedicular fixation, spines were again loaded (fixation cycle). Partial corpectomy of the fractured body and anterior strut grafting were accomplished; the spine reloaded (strut cycle). Spine angles were measured and biomechanical strength and kinematic parameters analyzed. Load-deformation relationships were similar for fixation and strut cycles until maximum load; at failure, loads were higher for the former (P < 0.05), however. Alignment was improved by stabilization or stabilization plus anterior grafting (P < 0.05). Vertebral height was best maintained by grafting as an adjunct to pedicle fixation (P < 0.05). Kinematics were largely unaffected by grafting, except for reduced motion at the posterior vertebral targets between the fixated levels (P < 0.05). The strength of the fixated spine is relatively unchanged by corpectomy and anterior grafting; alignment may be improved in the latter group.
Author List
Maiman DJ, Pintar F, Yoganandan N, Reinartz JAuthors
Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of WisconsinNarayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
Biomechanical PhenomenaBone Plates
Bone Screws
Bone Transplantation
Cadaver
Humans
Lumbar Vertebrae
Male
Spinal Fractures