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Open Access Research article

Effect of anterior translation of the talus on outcomes of three-component total ankle arthroplasty

Keun-Bae Lee1*, Myung-Sun Kim1, Kyung-Soon Park2, Kyu-Jin Cho1 and Andri Primadhi3

Author Affiliations

1 Department of Orthopedic Surgery, Chonnam National University Medical School and Hospital, 42 Jebongro, Donggu, Gwangju 501-757, Republic of Korea

2 Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri, Hwasun eup, Hwasun gun, Jeonnam 519-763, Republic of Korea

3 Department of Orthopaedics and Traumatology, Padjadjaran University / Hasan Sadikin Hospital, Bandung, Indonesia

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BMC Musculoskeletal Disorders 2013, 14:260  doi:10.1186/1471-2474-14-260

Published: 5 September 2013

Abstract

Background

Ankle osteoarthritis commonly involves sagittal malalignment with anterior translation of the talus relative to the tibia. Total ankle arthroplasty has become an increasingly popular treatment for patients with symptomatic ankle osteoarthritis. However, no comprehensive study has been conducted on the outcomes of total ankle arthroplasty for osteoarthritis with preoperative sagittal malalignment. The purpose of this study was to evaluate the effect of anterior translation of the talus on outcomes of three-component total ankle arthroplasty.

Methods

One hundred and four osteoarthritic ankles in 104 patients who underwent three-component total ankle arthroplasty were included in this study. The 104 ankles were divided into 2 groups: ankles with anteriorly translated talus (50 ankles), and ankles with non-translated talus (54 ankles). Clinical and radiographic outcomes were assessed in both groups. The mean follow-up duration was 42.8 ± 17.9 months (range, 24 to 95 months).

Results

Forty-six (92%) of 50 ankles with anterior translation of the talus showed relocation of the talus within the mortise at 6 months, and 48 (96%) ankles were relocated at 12 months after total ankle arthroplasty. But, 2 (4%) ankles were not relocated until the final follow-up. The AOFAS scores, ankle range of motion, and radiographic outcomes showed no significant difference between the two groups at the final follow-up (p > 0.05 for each).

Conclusions

In majority of cases, the anteriorly translated talus in osteoarthritic ankles was restored to an anatomical position within 6 months after successful three-component total ankle arthroplasty. The clinical and radiographic outcomes in the osteoarthritic ankles with anteriorly translated talus group were comparable with those in non-translated talus group.

Keywords:
Osteoarthritis; Total ankle arthroplasty; Three-component prosthesis; Anterior translation of the talus