Document Detail

Evaluation of the biomechanical efficacy of limited intercarpal fusions for the treatment of scapho-lunate dissociation.
MedLine Citation:
PMID:  2299151     Owner:  NLM     Status:  MEDLINE    
An experimental model that uses a static positioning frame, pressure-sensitive film, and a microcomputer-based videodigitizing system was used to measure the contact areas and pressures in a group of wrists in their "normal" state, after ligament sectioning, which resulted in stage III perilunate instability and then following different types of simulated carpal fusions. Compared with a normal wrist, there is an overall decrease in load in the lunate fossa and a significant increase in load in the scaphoid fossa in the wrist with stage III perilunate instability. Scaphoid-trapezium-trapezoid and scaphoid-capitate fusions transmitted almost all load through the scaphoid fossa. Scaphoid-lunate, scaphoid-lunate-capitate, and capitate-lunate fusions all distributed load more proportionately through both scaphoid and lunate fossae. The positioning of the carpal bones within a limited carpal fusion was also found to affect the load distribution in the wrist. The scaphoid-lunate, scaphoid-lunate-capitate, or capitate-lunate fusions, with attention to the relative carpal alignment within the limited fusion seem to offer more promise for treatment of perilunate instability biomechanically than the scaphoid-trapezium-trapezoid or scaphoid-capitate fusions.
S F Viegas; R M Patterson; P D Peterson; D J Pogue; D K Jenkins; T D Sweo; J A Hokanson
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of hand surgery     Volume:  15     ISSN:  0363-5023     ISO Abbreviation:  J Hand Surg Am     Publication Date:  1990 Jan 
Date Detail:
Created Date:  1990-03-05     Completed Date:  1990-03-05     Revised Date:  2009-06-08    
Medline Journal Info:
Nlm Unique ID:  7609631     Medline TA:  J Hand Surg Am     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  120-8     Citation Subset:  IM    
Division of Orthopaedic Surgery, University of Texas Medical Branch, Galveston 77551.
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MeSH Terms
Joint Instability / physiopathology,  surgery*
Lunate Bone / physiopathology,  surgery*
Middle Aged
Wrist Joint / physiopathology,  surgery*
Grant Support
5 R29 AR 38640-02/AR/NIAMS NIH HHS

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