Purpose
The purpose of this study was to perform a serial assessment of the radiologic parameters
of the mechanical axis (MA) and the weight-bearing line (WBL) using a weight-bearing
anteroposterior (AP) long-standing view of the lower extremity to determine whether
the postoperative MA and WBL change with time.
Methods
A total of 90 consecutive lower limbs were examined retrospectively from a weight-bearing
AP long-standing view of the lower extremity obtained from 120 patients who underwent
open-wedge high tibial osteotomy (OWHTO). A total of 30 patients were excluded because
of (1) complications (7 patients) such as bone graft collapse or broken screws, malunion,
or nonunion arising after surgery and (2) no acquisition of a regular series of weight-bearing
AP long-standing views of the lower extremity (23 patients). The AP long-standing
view of the lower extremity was taken, and weight-bearing AP long-standing views of
the lower extremity at 1 month, 6 months, 1 year, and 2 years postoperatively were
used for assessment of serial change. The Picture Archiving Communication System (Marotech,
Inc, St-Augustin-de-Desmaures, Quebec, Canada) was used for radiologic measurements
of the WBL ratio and MA. Serial changes were compared between 1 month, 6 months, 1
year, and 2 years postoperatively.
Results
The WBL ratio progressively shifted medially, with significant changes at all time
points until 1 year postoperatively (1 month to 6 months, P = .04; 6 months to 1 year, P = .04; 1 year to 2 years, P = .22). Even though the MA angle showed a similar decreasing trend, it showed no
statistical difference (P > .05).
Conclusions
This study showed that after OWHTO, the WBL shifts progressively medially until 1
year postoperatively.
Level of Evidence
Level IV, diagnostic study.
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Article info
Publication history
Accepted:
November 26,
2013
Received:
March 18,
2013
Footnotes
Supported by a 2014 Inje University Research Grant.
The authors report that they have no conflicts of interest in the authorship and publication of this article.
Identification
Copyright
© 2014 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.
ScienceDirect
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- Critical Comments and Questions Regarding the Article “Serial Assessment of Weight-Bearing Lower Extremity Alignment Radiographs After Open-Wedge High Tibial Osteotomy”ArthroscopyVol. 30Issue 9
- PreviewIt was with great interest that we read the article “Serial assessment of weight-bearing lower extremity alignment radiographs after open-wedge high tibial osteotomy” by Lee et al.1 in the March 2014 issue of Arthroscopy. We have some comments and questions regarding the methods, figures, discussion, and conclusions.
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