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

Hong-Geun Jung; Dong-Oh Lee; Sang-Hun Lee; Joon-Sang Eom

doi:10.4055/jkoa.2015.50.2.124

Journal List > J Korean Orthop Assoc > v.50(2) > 1013358

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Jung, Lee, Lee, and Eom: Short-Term Results of the Total Ankle Arthroplasty with Mobility Total Ankle Prostheis

Original Article

Journal of the Korean Orthopaedic Association 2015; 50(2): 124-131.

Published online: 30 April 2015

DOI: https://doi.org/10.4055/jkoa.2015.50.2.124

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

Hong-Geun Jung, M.D., Ph.D., Dong-Oh Lee, M.D., Sang-Hun Lee, M.D., Joon-Sang Eom, M.D.

Department of Orthopedic Surgery, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Korea.

Correspondence to: Dong-Oh Lee, M.D. Department of Orthopedic Surgery, Konkuk University Medical Center, 120-1 Neungdong-ro, Gwangjin-gu, Seoul 143-729, Korea. TEL: +82-2-2030-8765, FAX: +82-2-2030-7369, ronaki@naver.com

Received 6 September 2014 Revised 10 November 2014 Accepted 5 January 2015

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.

Keywords: ankle, arthritis, total ankle replacement, mobility

Figures and Tables

Figure 1

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

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.

Figure 3

Radiographs show corrected alignment of ankle after total ankle arthroplasty.

Table 1

Average of Preoperative and Postoperative Clinical Results

Values are presented as median (range) or number only. VAS, visual analogue scale; ROM, range of motion; AOFAS, American Orthopaedic Foot and Ankle Society.

Table 2

Combined Procedures Performed in 21 (52.5%) of 40 Ankles during Total Ankle Arthroplasty

TMT, tarsometatarsal.

Table 3

Reoperations after Mobility TAA

Peroneus longus (PL) transfer means PL transfer to peronus brevis. TAA, total ankle arthroplasty; RA, rheumatoid arthritis; IOA, idiopathic osteoarthritis; PTOA, posttraumatic osteoarthritis; TMT, tarsometatarsal; LSCO, lateral calcaneal sliding osteotomy.

Notes

^{CONFLICTS OF INTEREST} The authors have nothing to disclose.

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