J Korean Foot Ankle Soc.  2016 Mar;20(1):19-22. 10.14193/jkfas.2016.20.1.19.

Outcomes of Ankle Arthroplasty with Preoperative Varus Deformity of More Than 20 Degrees: Comparison with the Group of Varus Deformity of Less Than 20 Degrees

• Kim H
• Lee M

• KMID: 2158423
• DOI: http://doi.org/10.14193/jkfas.2016.20.1.19

Abstract

PURPOSE
We compared the results of total ankle arthroplasty in patients with preoperative varus deformity of more than 20degrees with those of patients with varus deformity less than 20degrees.
MATERIALS AND METHODS
From January 2005 to January 2013, 9 ankles with preoperative varus deformity of more than 20degrees (varus group) and 31 ankles with varus deformity less than 20degrees (control group) underwent total ankle arthroplasty. Clinical results were evaluated using the American Orthopaedic Foot and Ankle Society (AOFAS) score, and radiographic results were assessed using tibiotalar varus angle in standing anteroposterior radiographs taken preoperatively and at the last follow-up.
RESULTS
The mean duration of clinical follow-up was 42.8 months (14~60 months). The AOFAS score was improved by a mean 47.0 points in the varus group and 37.6 points in the control group. Statistically significant difference was observed between the two groups (p=0.041). Tibiotalar varus angle measured at the last follow-up radiograph was 2.5degrees in the varus group and 1.0degrees in the control group and the difference was not statistically significant (p=0.820).
CONCLUSION
Satisfactory clinical and radiographic results can be achieved in patients with varus deformity more than 20degrees by precise bone resection and soft tissue release.

Keyword

Ankle; Varus deformity; Arthroplasty; Postoperative alignment

MeSH Terms

Ankle*
Arthroplasty*
Congenital Abnormalities*
Follow-Up Studies
Foot
Humans

Figure

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  Figure 1. Standing anteroposterior radiograph shows the measurement of ankle alignment which is defined as the angle between the anatomical axis of the tibia and a line drawn perpendicular to the talar dome (angle A). The extent of varus deformity in this case is 26o.

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  Figure 2. Standing anteroposterior radiographs before and 44 months after total ankle arthroplasty. (A) Preoperative radiograph shows varus deformity of 28° in a 73-year-old man with post-traumatic arthritis. (B) The patient is satisfied and has a postoperative varus of 2° and an American Orthopaedic Foot and Ankle Society score of 88.

Reference

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