J Korean Orthop Assoc.  2015 Apr;50(2):124-131. 10.4055/jkoa.2015.50.2.124.

Short-Term Results of the Total Ankle Arthroplasty with Mobility Total Ankle Prostheis

• Jung HG
• Lee DO
• Lee SH
• Eom JS

• KMID: 2106747
• DOI: http://doi.org/10.4055/jkoa.2015.50.2.124

Abstract

PURPOSE
Recently, minimally constrained 3-component total ankle systems have been often performed to address painful ankle arthritis. We report early clinical and radiographic outcome of the total ankle arthroplasty with Mobility system for end-stage ankle arthritis.
MATERIALS AND METHODS
Total ankle arthroplasty was performed with Mobility total ankle system in 40 ankles (39 patients) from November 2008 to January 2013. The mean age at surgery was 63.7 years (range, 50-78 years). The mean follow-up duration was 20.8 months (range, 12-56 months). The primary etiology for ankle arthritis was post-traumatic arthritis (26 ankles, 65%). The outcome was assessed based on visual analogue scale (VAS), American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot function score, patient satisfaction and radiographic measurements.
RESULTS
There was a significant reduction in VAS pain score from an initial average of 7.7 points (range, 5-10 points) to 2.8 points at the final follow-up (range, 0-7) (p<0.05). The mean AOFAS score improved significantly from 46.8 (range, 15-68) preoperatively to postoperatively 82.4 (range, 63-100) (p<0.05). Eighty-one percent of patients were satisfied with the result. Combined surgeries, such as Achilles tendon percutaneous lengthening, were performed in twenty-one cases of 40 ankles.
CONCLUSION
The current short term results of Mobility total ankle arthroplasty showed a quite favorable functional and radiographical outcome with few major complications. However, the long term follow-up study with larger number of cases is needed in the future.

Keyword

ankle; arthritis; total ankle replacement; mobility

MeSH Terms

Achilles Tendon
Ankle*
Arthritis
Arthroplasty*
Arthroplasty, Replacement, Ankle
Follow-Up Studies
Foot
Humans
Patient Satisfaction

Figure

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  Figure 1 (A) Antero-posterior radiograph shows α angle. (B) Lateral radiograph shows β angle. (C) Lateral radiograph shows γ angle.

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  Figure 2 (A) Antero-posterior radiograph shows varus deformity of ankle. (B) Lateral radiograph shows osteoarthritic change in ankle of varus deformity. (C) Hindfoot alignment view shows varus deformity of heel.

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  Figure 3 Radiographs show corrected alignment of ankle after total ankle arthroplasty.

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