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Comparative Study
, 21 (2), 451-5

The Weight-Bearing Scanogram Technique Provides Better Coronal Limb Alignment Than the Navigation Technique in Open High Tibial Osteotomy

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Comparative Study

The Weight-Bearing Scanogram Technique Provides Better Coronal Limb Alignment Than the Navigation Technique in Open High Tibial Osteotomy

Dae-Hee Lee et al. Knee.

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.

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

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