Document Detail

Bio-interference screw cyst formation in anterior cruciate ligament reconstruction-10-year follow up.
MedLine Citation:
PMID:  22341197     Owner:  NLM     Status:  Publisher    
PURPOSE: This study used serial MRI to assess the absorption of a poly l-lactide Bioabsorbable interference screw used in the anterior cruciate ligament reconstruction with a 4-strand hamstring technique. METHODS: A consecutive series of ten patients undergoing anterior cruciate ligament reconstruction a 4-strand hamstring technique were assessed with magnetic resonance imaging (MRI) scans at 1, 2, 4, 7 and 10years postoperatively. RESULTS: No resorption had occurred after 4years in any of the patients. By 7years screw absorption was complete in seven patients and had progressed in three. New cyst formation occurred in 3 patients between 5 and 7years. Half the patients displayed small fluid collections within the tibial tunnels. At 10years all screws were fully absorbed; however cyst formation was common, including the development of a new cyst in the period between 7 and 10years in one patient. None of the patients had instability, persistent effusions, or clinically detectable adverse reactions to the screws. CONCLUSIONS: This study has shown that poly l-lactide bioabsorbable screws take longer to resorb than initial in vitro data suggested. It is unclear whether ganglion formation within the tibial tunnel is related to screw resorption or the hamstring graft. The theoretical advantages of bioabsorbable screws must be weighed against these findings.
Andrew P Sprowson; Stephen E Aldridge; Jennifer Noakes; J W Read; David G Wood
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-14
Journal Detail:
Title:  The Knee     Volume:  -     ISSN:  1873-5800     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9430798     Medline TA:  Knee     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier B.V.
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