Document Detail

Vertebral pedicle diameter as determined by computed tomography: inaccuracies observed by direct measurement of cadaveric lumbar spine.
MedLine Citation:
PMID:  7824985     Owner:  NLM     Status:  MEDLINE    
The isthmic diameter of the vertebral pedicle is an important dimension affecting the stability of transpedicular screwing. The isthmic diameter of the pedicle was measured in the lumbar spines of 18 Japanese cadavers (10 male, 8 female) by axial computed tomographic (CT) scan and directly with calipers. In L1 and L2, there was no significant difference between the average value of the isthmic diameter as determined by the two methods (Student's t-test). However, in L3-5, the average value of the isthmic diameter as determined by axial CT scan was significantly greater than that given by caliper measurement. In view of the fact that caudally the longitudinal axis of the pedicle diverges towards the mid-line of the vertebral body in the coronal plane, the plane of the CT scan cannot be parallel to the real isthmic diameter of the pedicle. Therefore, it is suggested that below L2 the diameter as determined by axial CT scanning is greater than the real isthmic diameter.
K Okuyama; K Sato; E Abe; S Onuma; N Ishikawa
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Publication Detail:
Type:  In Vitro; Journal Article    
Journal Detail:
Title:  Skeletal radiology     Volume:  23     ISSN:  0364-2348     ISO Abbreviation:  Skeletal Radiol.     Publication Date:  1994 Oct 
Date Detail:
Created Date:  1995-02-14     Completed Date:  1995-02-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7701953     Medline TA:  Skeletal Radiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  551-3     Citation Subset:  IM    
Department of Orthopaedic Surgery, Akita University School of Medicine, Japan.
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MeSH Terms
Aged, 80 and over
Lumbar Vertebrae / anatomy & histology,  radiography*
Middle Aged
Tomography, X-Ray Computed*
Comment In:
Skeletal Radiol. 1995 May;24(4):262   [PMID:  7644937 ]

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