Document Detail

Variability of single-leg versus double-leg stance radiographs in the varus knee.
MedLine Citation:
PMID:  19634724     Owner:  NLM     Status:  MEDLINE    
We evaluated measured radiographic parameter variability between single-leg stance (SLS) and double-leg stance (DLS) radiographs in patients with varus knee malalignment, indicated for high tibial osteotomy. Fifty-three consecutive knees (mean, 49 years; range, 18-79 years) were evaluated for varus thrust. SLS and DLS radiographs were obtained. A single blinded observer measured mechanical axis angles and weight-bearing line (WBL) deviation using a goniometer. Mechanical axis angles averaged 9.1 degrees (DLS) and 11.3 degrees (SLS). SLS radiographs averaged 9% greater WBL medialization than did DLS. Medial opening averaged 16.4 mm (DLS) and 18.8 mm (SLS). DLS and SLS radiographs showed no significant differences in patients without varus thrust. Patients with varus thrust demonstrated differences in mechanical axis angles (DLS, 9.4 degrees; SLS, 12.2 degrees), WBL deviation (12.1% less), medialization (DLS), and medial opening necessary for correction (DLS, 16.6 mm; SLS, 20.3 mm). In varus thrust, SLS radiographs more closely replicate dynamic knee malalignment, possibly providing more accurate measurements of angular deformity.
Andrew Chen; Valerie Rich; Elizabeth Bain; William I Sterett
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of knee surgery     Volume:  22     ISSN:  1538-8506     ISO Abbreviation:  J Knee Surg     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-07-28     Completed Date:  2009-08-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137599     Medline TA:  J Knee Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  213-7     Citation Subset:  IM    
Littleton Orthopaedics, Littleton, NH, USA.
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MeSH Terms
Arthrometry, Articular
Bone Malalignment / radiography*,  surgery
Knee Joint / radiography*,  surgery
Middle Aged
Osteoarthritis, Knee / radiography,  surgery

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