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Knee. 2014 Mar;21(2):451-5. doi: 10.1016/j.knee.2012.09.003. Epub 2012 Oct 5.

The weight-bearing scanogram technique provides better coronal limb alignment than the navigation technique in open high tibial osteotomy.

Author information

  • 1Department of Orthopaedic Surgery, Inje University, Ilsanpaik Hospital, Ilsan, Korea; Department of Orthopaedic Surgery, Korea University, Anam Hospital, Seoul, Korea.
  • 2Department of Orthopaedic Surgery, Korea University, Anam Hospital, Seoul, Korea.
  • 3Department of Orthopaedic Surgery, Konkuk University Medical Center, Seoul, Korea.
  • 4Department of Orthopaedic Surgery, Gumdan Top Hospital, Incheon, Korea.
  • 5Department of Orthopaedic Surgery, Inje University, Ilsanpaik Hospital, Ilsan, Korea.
  • 6Department of Orthopaedic Surgery, Inje University, Ilsanpaik Hospital, Ilsan, Korea. Electronic address: kwnhamj@hotmail.com.

Abstract

BACKGROUND:

Successful outcomes following high tibial osteotomy (HTO) require precise realignment of the mechanical axis of the lower extremity. The present study investigated whether the weight-bearing limb scanogram (WBS) technique provided a more accurate mechanical axis realignment than the navigation technique in open high tibial osteotomy (OHTO).

METHODS:

This prospective study involved 80 knees (78 patients) undergoing OHTO. The WBS technique was used in 40 knees and the navigation technique in 40 knees. Each technique was performed by a different surgeon in a different hospital. Postoperative coronal limb alignment was assessed using the weight-bearing line (WBL) ratio on full-length standing hip-to-ankle radiographs.

RESULTS:

We found that the mean postoperative WBL ratio was greater in the WBS compared to the navigation group (p=0.001), and hence the ratio for the WBS group was closer to the ratio target of 62%. There was a greater proportion of WBL ratio outliers in the navigation group than the WBS group (25% vs. 10%, p=0.034).

CONCLUSION:

We conclude that the WBS technique was more accurate than the navigation technique for restoration of coronal leg alignment in OHTO.

LEVEL OF EVIDENCE:

Level II.

Copyright © 2012 Elsevier B.V. All rights reserved.

KEYWORDS:

Accuracy; Navigation; Open high tibial osteotomy; Weight-bearing limb scanography

PMID:
23041300
[PubMed - in process]
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