Clinico-Radiological Results of Hemiepiphysiodesis Using Eight-Plate in Adolescents and Paediatric Age Groups With Idiopathic Bilateral Genu Valgum

Abstract

BACKGROUND Through this study we want to evaluate the results of hemiepiphysiodesis of distal femoral physis with eight-plate for correcting the knock knee in adolescent age group. Genu valgum is considered physiological up to the age of 3-4 years. The maximum value of genu valgum is observed at age of 3-4 years and this further spontaneously resolves around 7 years of age. Persistence of genu valgum beyond this age is pathological and requires some form of treatment. METHODS This is a prospective longitudinal study in which 30 patients with idiopathic bilateral genu valgum were treated surgically by hemiepiphysiodesis using eight-plates. Patient evaluated with radiograph and clinically assessed at every follow up till 36 months. RESULTS We evaluated 30 patients who were surgically managed for bilateral idiopathic genu valgum over a 36-month period. The average age at surgery was 13 years and 7 months (Range 11 years 8 months-14 years 6 months). The mean preoperative tibiofemoral angle was found to be 17 0 with a standard deviation +/-2.7 0 , and post-surgery the mean tibiofemoral angle was recorded to be 5 0 with a standard deviation +/-1 0. The total follow-up period was 36 months. CONCLUSIONS Hemiepiphysiodesis using eight plate is a simple technique for correction of idiopathic genu valgum in adolescent and paediatric patients. It produces reproducible results, is cost effective and ensures rapid return to preoperative level of school and recreational activities.