Document Detail

The force exerted by the halo pin. A study comparing different halo systems.
MedLine Citation:
PMID:  1440036     Owner:  NLM     Status:  MEDLINE    
Seven different halo systems were evaluated biomechanically to compare the force exerted by the halo pin in each system. In three different experiments torque values of 2, 4, 6, 7, and 8 in lb were applied to the halo pin, and the force at the skull end of the halo pin was measured using a load cell. In the first experiment, the threads on the halo pin were dry, in the second experiment saline was applied to the threads on the pin, and in the third experiment cadaveric bone from the skull was interposed between the pin and the load cell. The results showed that for a given value of applied torque to the pin, the force exerted by the pin end varied widely according to the halo system and whether or not the pin was "lubricated."
T E Whitesides; W L Mehserle; W C Hutton
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Spine     Volume:  17     ISSN:  0362-2436     ISO Abbreviation:  Spine     Publication Date:  1992 Oct 
Date Detail:
Created Date:  1992-12-03     Completed Date:  1992-12-03     Revised Date:  2009-07-09    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  S413-7     Citation Subset:  IM    
Department of Orthopaedics, Emory University School of Medicine, Decatur, Georgia.
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MeSH Terms
Bone Nails
Cervical Vertebrae*
External Fixators*
Middle Aged
Sodium Chloride
Stress, Mechanical
Traction / instrumentation*
Reg. No./Substance:
7647-14-5/Sodium Chloride

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

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