Management of Nonunion of Distal Tibial Periarticular Fractures Using Ilizarov External Fixator

Nonunion of the periarticular distal tibial fractures is a challenging issue with limited options for treatment. The study aims to evaluate the outcomes of treatment of non-united periarticular distal tibial fractures using Ilizarov external fixation. A retrospective study included 16 patients with distal tibial fracture nonunion treated with Ilizarov fixator from 2014 to 2019 with a minimum 1-year follow-up after frame removal. Fibular plating was done in 8 cases and supplementary interfragmentary screws at the nonunion site in 5 cases. Primary or delayed bone graft was used in 11 patients. The ASAMI protocol was used to assess the bone and functional results. The American Orthopaedic Foot and Ankle Society (AOFAS) scale was used to assess the functional outcomes. Study included 9 males and 7 females, mean age of 47.4 +/- 14.1 years. 15 cases had previous surgeries for nonunion. 7 had active infection. duration of nonunion was 24.1 +/- 13.2 months. Mean duration of fixation was 5.7 +/- 1.0 months. Mean follow-up was 21.8 +/- 8.5 months. Mean AOFAS score improved from 52.4 +/- 3.7 preoperatively to 85.4 +/- 9.8 at the latest follow-up (P<0.001). Finally, the infection was resolved, and union was achieved in all patients. Bone results were excellent in 3 cases and good in 13, whereas functional results were excellent in 6 cases, good in 8, fair in 1, and poor in 1. Ilizarov fixator is a reliable option for treating nonunion in the periarticular distal tibial fractures. It provides secure fixation for short distal fragments, especially with history of infection, those with bad skin conditions, previous failed internal fixation, and osteopenic bone.