Objective      To investigate the clinical efficacy of bone transport technique in the treatment of severe lower extremity infected bone nonunion.       Methods      A total of 26 patients with lower limb long bone nonunion due to severe infection admitted in our department from the years of 2006 to 2012 were enrolled in this study. According to the principle of distraction histogenesis

they were treated by complete focal excision and metaphyseal osteotomy transport technique. In 7 d after surgery

the transported bone graft was extended in a speed of 0.25 mm per 6 hours to fill bone defect. The pressure outside the fixed bracket was maintained to the bone defect between the 2 ends till the bone healing.       Results      All the 26 cases were followed up for a duration of 20 to 92 months (average 56 months). The transported bone graft was lengthened for 2 to 14 cm (average 5.5 cm). Bony infection was cured. They were with support for 6 to 24 months (average 13 months). Twenty-three cases had the bone defect and prolonged bone growth well and achieved bony union. There were 3 cases having bone exposure

with broken ends without obvious bone healing in 6 months after surgery. Two of them underwent autologous iliac bone grafting. One case received autologous iliac bone graft and internal fixation after stent removal

and achieved bone healing n 4 to 6 months later. Sound linear and positional alignments were observed in the osteotomy sites and bone defects.       Conclusion      Bone transport technique achieves well controlled infection after operation and high rate of bone union in the treatment of lower limb bone nonunion due to infection.