Document Detail

The strength of a posterior element claw at one versus two spinal levels.
MedLine Citation:
PMID:  2134438     Owner:  NLM     Status:  MEDLINE    
In the Cotrel-Dubousset and Texas Scottish Rite Hospital spinal implants systems, the upper hook on the convex rod is usually clawed to prevent posterior pull out. A transverse process hook and an upwardly directed pedicle hook are usually inserted on the same lamina level. However, clawing two levels instead of one is a simpler surgical procedure. We biomechanically compared the posterior pull-out strength of a one-level versus two-level construct. The average load of failure of the double-level construct was significantly greater (p less than 0.05) as compared with the single level. Thus, the two-level construct is not only easier to insert, it is also stronger.
J W Roach; R B Ashman; R N Allard
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of spinal disorders     Volume:  3     ISSN:  0895-0385     ISO Abbreviation:  J Spinal Disord     Publication Date:  1990 Sep 
Date Detail:
Created Date:  1992-04-30     Completed Date:  1992-04-30     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8904842     Medline TA:  J Spinal Disord     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  259-61     Citation Subset:  IM    
Research Department, Texas Scottish Rite Hospital, Dallas 75219.
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MeSH Terms
Equipment Design
Internal Fixators*
Spinal Fusion / instrumentation*
Stress, Mechanical
Thoracic Vertebrae / surgery

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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