Abstract
Aims: Hindfoot deformity in varus position is an aetiology of chronic ankle instability without laxity. In this condition, a Dwyer osteotomy has to be performed.
Methods: Between 1992 and 2000, 15 patients have been operated on, with this technique. The mean varus deformity was of 5û (3û to 10û).13 patients had sporting activities, 8 of them in competition. Instability during sporting activity were present in 60% of cases. Associated lesions were reported in 6 cases. A Dwyer procedure using a 1/3 tube plate þxed with two screws were performed in all cases. Associated procedures were performed at the same time as such as a lateral ligamentoplasty or a þrst metatarsal osteotomy. All patients were reviewed clinically and radiologically using AOFAS score.
Results: The mean follow-up was of 3.5 years (1 to 9 years). The only one complication reported was a skin necrosis, treated by a cutaneous ßap in a patient operated on with Dwyer and ligamentoplasty in the same procedure. No ankle instability was reported. Mild pain was reported in 10 patients and 50% of them only for sporting activities.11 patients returned to sporting activity and 33% of them at the same level. The mean Kita-oka score was of 92 (85 to 100). The patients were satisþed and very satisþed in 80 of cases.
Conclusions: Dwyer lateral closing wedge calcaneal osteotomy is successful for the treatment of chronic ankle instability without laxity and with varus hindfoot deformity. When laxity is associated with varus deformity an operative procedure in two steps is necessary to avoid wound complication. Dwyer osteotomy has to be performed þrst.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
