Bone Transport in the Management of Post-Osteomyelitis Tibial Defects in Pediatric Population. A Long Term Follow-up Study in Uganda

Abstract

Background: This study was designed to evaluate the long-term results and complications of using the bone transport technique in the management of post-osteomyelitis tibial defects in a low income country. Design: Retrospective study in a cohort of pediatric patients. Methods: Twenty-two patients were included in the study; all patients were treated between 2005 and 2014. The mean age at time of surgery was 9.5 years. The mean bone defect was 8.2 cm. Transport was done using both ring and monolateral external fixators; the fixator stayed in place for 290 days on average. Clinical and radiological evaluations were performed after a minimum follow-up period of 7 years. Patients were interviewed by social workers with focus on the psychosocial and economic costs of the procedure. Results: The bone and soft tissues management required a total of ninety-one surgeries, with an average of four surgeries per child. Eradication of infection was obtained in all patients. Bone results were graded as excellent in 10, good in 7, fair in 2 and poor in 3. Functional results were graded as excellent in 8, good in 6, fair in 7 and poor in 1. Major and minor complications were numerous during the bone transport procedure. Three cases of non-union at the docking point were observed. Twelve patients had a limb length discrepancy, four had slight angular deformities. Reduced range of motion was observed both in the ankle (n=4) and knee (n=2). Seven joint fusions were noted, two knees and five ankles. Conclusion: Bone transport is a valid option in the management of bone defects in children, providing satisfactory long-term outcomes. Bone gaps, soft tissue defects, limb discrepancy and joint disorders can be managed concurrently. The procedure is lengthy and prone to complications.