Document Detail


A biomechanical assessment of repair versus nonrepair of sheep flexor tendons lacerated to 75 percent.
MedLine Citation:
PMID:  20189731     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The benefit of repairing a 75% partial flexor tendon laceration remains controversial. The purpose of this study was to assess the degree of gap formation with and without repair when the 75% lacerated tendon is subjected to cyclic loading. Repair with only a peripheral suture was compared to that using a core and peripheral repair technique. METHODS: Sixteen deep flexor tendons from sheep hind limbs were lacerated to 75% of the tendon diameter. The cut tendons were loaded for 100 cycles from 3 N up to 30 N and then back to 3 N, at a rate of 0.2 Hz. Gap formation was measured at 0 and 100 cycles. Tendons were then randomized into 2 repair groups of 8 each: group 1 was repaired with only a simple, running peripheral suture (6-0 polypropylene monofilament), whereas group 2 was repaired with a modified Kessler core suture (4-0 silicone-coated braided polyester) plus a peripheral suture (6-0 polypropylene monofilament). Repaired tendons were tested for 500 cycles, and the gap was measured at 0, 100, and 500 cycles. After cycling, gap was measured at 100 N load, and the peak loads were determined on static failure testing. RESULTS: The 75% partially lacerated tendons had >2 mm gap at 100 cycles. This gap was significantly reduced by peripheral or peripheral plus core repairs (p < .001). There was no difference in gap formation between tendons with peripheral repair only and those with both peripheral and core repairs. Gap formation in repaired tendons remained <or=1 mm at 500 cycles. After cycling, neither gap formation at 100 N load or the peak loads on failure testing differed between the 2 repair groups. CONCLUSIONS: There is a large gap when an unrepaired 75% partial laceration is cyclically loaded. This gap is significantly reduced with a peripheral repair whether or not a core suture is used.
Authors:
Roger Haddad; Peter Scherman; Tim Peltz; Sean Nicklin; William R Walsh
Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2010-03-02
Journal Detail:
Title:  The Journal of hand surgery     Volume:  35     ISSN:  1531-6564     ISO Abbreviation:  J Hand Surg Am     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-07-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7609631     Medline TA:  J Hand Surg Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  546-51     Citation Subset:  IM    
Affiliation:
Surgical and Orthopaedic Research Laboratories, University of New South Wales, Prince of Wales Hospital, Sydney, Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomechanics
Hindlimb
Lacerations / surgery*
Random Allocation
Sheep
Stress, Mechanical
Suture Techniques
Tendon Injuries / surgery*
Tenodesis / methods*

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


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