Effectiveness of eight plate in correcting angular deformity around knee: A study at tertiary care hospital

Abstract

Background: Angular deformity around the knee is the common problem in growing childs. Genu valgum & Genu varum causes short term & long term effects on knees like Patellar maltracking, Osteoarthritis, ligament laxity & instability.so the study was done to evaluate effictiveness of temporary hemiepiphysiodesis using eight plate in the Indian population at tertiary care centre. Method and Materials: Retro-prospective study was carried out in Orthopaedic dept at Dr R N Cooper hospital, Mumbai over the period of 2 yrs from June 2014 to May 2016. The study includes 31 patients i.e. 58 knees between the age group 4 yrs to 13.5yrs which were operated with Eight plate fixation for angular deformity correction. Every 3 month followup with clinical & radiological assessment for the period of 1 yr or till implant removal was done. The results were tabulated & analysed statistically using test of significance (chi square, ANOVA & Student t test) whenever necessary. Result: In our study we found average rate of correction of a) IMD/ICD was 1.17cm/month, b) mLDFA was 0.58 degrees / month, c) mPTA was 0.52 degrees / month, d) Mechanical axis was 1.17mm/ month, e) Tibiofemoral angle was 0.30 gegrees / month. We also had two complications i.e. overcorrection in one case & found no correction in one patient. Conclusion: Guided growth for angular deformity around knee using eight plate provides faster correction rate as compared to staples and transphyseal screws. It does not cause physeal arrest. It provides reversible growth. Minimal implant related complications like plate migration, plate bending and Breakage. Guided Growth using Eight plate is a safe and effective method for surgical correction of angular deformities around Knee Joint.