Document Detail

High frequency distraction improves tissue adaptation during leg lengthening in humans.
MedLine Citation:
PMID:  12168668     Owner:  NLM     Status:  MEDLINE    
The present study investigates the effect of distraction frequency on the development of tensile force in the tissues during lengthening. Two patients with bilateral Ilizarov leg lengthening underwent distraction with high frequency in one leg and low frequency in the other. The clinical situation represented a unique model for investigating the effect of distraction frequency, as each individual served as its own control. Both patients had double level lengthening. Distraction frequency at the proximal lengthening zone was 0.25 mm x 4 in the first leg and 1/1440 mm once every minute in the other. Total diurnal distraction at the proximal metaphysis was 1 mm in both legs. In addition, a distal metaphyseal distraction of 0.25 mm x 3 daily was performed on each leg. The tissue's mechanical response was monitored by measuring the tensile force at the proximal osteotomy. Both patients experienced a significant lower level of force during the high frequency lengthening. The lower level of force was concluded to be due to improved soft tissue adaptation, rather than reduced bone regeneration. Accordingly, high distraction frequency was considered favourable to low frequency, and is recommended in large lengthenings where high force levels are expected.
Gudrun Trøite Aarnes; Harald Steen; Per Ludvigsen; Leif Pål Kristiansen; Olav Reikerås
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of orthopaedic research : official publication of the Orthopaedic Research Society     Volume:  20     ISSN:  0736-0266     ISO Abbreviation:  J. Orthop. Res.     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-08-09     Completed Date:  2002-08-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8404726     Medline TA:  J Orthop Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  789-92     Citation Subset:  IM    
National Hospital Orthopaedic Department, Oslo Orthopaedic University Clinic, Rikshospitalet, Norway.
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MeSH Terms
Adaptation, Physiological
Osteogenesis, Distraction*
Tensile Strength

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

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