Morphometry of the thoracic and lumbar spine related to transpedicular screw placement for surgical spinal fixation

Vertebral transpedicular screws provide secure attachment for posterior spinal fixation devices. Screw design details, biomechanics, and implantation safety depend upon anatomic constraints, especially from the pedicle and body. Previous morphometric data were limited; thus, a retrospective study wa...

Full description

Saved in:
Bibliographic Details
Published in:Spine (Philadelphia, Pa. 1976) Pa. 1976), 1988, Vol.13 (1), p.27-32
Main Authors: KRAG, M. H, WEAVER, D. L, BEYNNON, B. D, HAUGH, L. D
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Biological and medical sciences
Female
Fracture Fixation, Internal - methods
Humans
Lumbar Vertebrae - diagnostic imaging
Lumbar Vertebrae - injuries
Lumbar Vertebrae - surgery
Male
Medical sciences
Middle Aged
Orthopedic surgery
Retrospective Studies
Spinal Injuries - diagnostic imaging
Spinal Injuries - surgery
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Thoracic Vertebrae - diagnostic imaging
Thoracic Vertebrae - injuries
Thoracic Vertebrae - surgery
Tomography, X-Ray Computed
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Vertebral transpedicular screws provide secure attachment for posterior spinal fixation devices. Screw design details, biomechanics, and implantation safety depend upon anatomic constraints, especially from the pedicle and body. Previous morphometric data were limited; thus, a retrospective study was undertaken using computerized axial tomograms (CT) of 91 vertebrae (T9-L5). In addition, eight cadaver vertebrae were CT scanned and then cut transversely to compare x-ray measurements with direct physical measurements. Measured parameters included pedicle width, pedicle length, angle of pedicle axis to sagittal plane, and transpedicular cortex-to-cortex chord length. Good correlation is shown to occur between CT scan and direct physical measurements of human vertebrae. Implications for spinal implant screw dimensions and safety of implantation are discussed. Comparison with previously available data is made.
ISSN:0362-2436
1528-1159
DOI:10.1097/00007632-198801000-00007