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JOURNAL ARTICLE

An Alumina Ceramic Total Talar Prosthesis for Osteonecrosis of the Talus

Akira Taniguchi, Yoshinori Takakura, Yasuhito Tanaka, Hiroaki Kurokawa, Kiyonori Tomiwa, Takenori Matsuda, Tsukasa Kumai, Kazuya Sugimoto
Journal of Bone and Joint Surgery. American Volume 2015 August 19, 97 (16): 1348-53
26290086

BACKGROUND: Treatment of osteonecrosis of the talus is challenging. Total talar replacement has the potential to restore the function of the ankle joint without an associated leg-length discrepancy. The purpose of the present study was to investigate postoperative function and pain after total talar replacement in patients with osteonecrosis of the talus.

METHODS: Fifty-five ankles in fifty-one consecutive patients with osteonecrosis of the talus who were treated with a total talar replacement from 2005 to 2012 were included in the investigation. Scores according to the Japanese Society for Surgery of the Foot (JSSF) ankle-hindfoot scale and the Ankle Osteoarthritis Scale (AOS) were assessed before surgery and at the final follow-up evaluation.

RESULTS: According to the JSSF ankle-hindfoot scale, the score for pain improved from a mean (and standard deviation) of 15 ± 9.4 points (range, 0 to 20 points) to 34 ± 5.6 points (range, 20 to 40 points); the score for function, from 21.2 ± 9.7 points (range, 4 to 38 points) to 45.1 ± 4.0 points (range, 37 to 50 points); the score for alignment, from 6.0 ± 2.8 points (range, 5 to 10 points) to 9.8 ± 0.9 points (range, 5 to 10 points); and the total score, from 43.1 ± 17.0 points (range, 11 to 68 points) to 89.4 ± 8.4 points (range, 76 to 100 points). According to the AOS scale, the score for "pain at its worst" improved from a mean of 6.1 ± 3.3 points (range, 0 to 9.9 points) to 2.0 ± 1.7 points (range, 0 to 6.3 points).

CONCLUSIONS: Prosthetic talar replacement is a useful procedure for patients with osteonecrosis of the talus as it maintains ankle function.

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