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Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
The weight-bearing scanogram technique provides better coronal limb alignment than the navigation technique in open
Dae-Hee Lee1, Seoung-Bum Han2, Kwang-Jun Oh3
1Department of Orthopaedic Surgery, Inje University, Ilsanpaik Hospital, Ilsan, Korea; Department of Orthopaedic Surgery, Korea University, Anam Hospital, Seoul, Korea.
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.
