Abstract
The management of long bone infected non-unions; posttraumatic chronic osteomyelitis and primary segmental bone defects constitute some of the most difficult reconstructive challenges encountered by orthopaedic surgeons. Measures employed to treat these conditions are tantamount to limb salvage with amputation a likely outcome if reconstructive endeavors prove unsuccessful. The Ilizarov method of distraction osteogenesis and bone transport, following radical debridement in the case of infection, is one potential management option in such cases.
Aim: To assess outcome in a cohort of patients with long bone defects treated with this technique.
Methods: Clinical review coupled with retrospective chart study and radiographic assessment.
Results: 24 patients (20 adults, 4 children) underwent treatment over a 6-year period. 21 had defects of a primary traumatic aetiology (18 tibial and 3 femoral fractures). The mean interval between injury and commencing bone transport was 41.6 months. The mean defect dimension requiring transport was 9cm (range 4.5 to 28cm). The mean external fixation time was 14.6 months. Union occurred in 21 cases. Autologous bone grafting of the docking site was performed in 6 cases in order to stimulate union. Following removal, frames were reapplied in 4 cases due to refracture or development of angular deformity. Two patients proceeded to below knee amputations. According to ASAMI* criteria, the bone result was excellent in 12 patients, good in 5 patients, fair in one patient and poor in 6 patients. Functional outcome was excellent in 7 patients, good in 12, fair in 2 and poor in 3.
Conclusion: The Ilizarov method of bone transport is a reliable procedure providing consistent results in complex cases when frequently alternative treatment options have been exhausted. Outcome compares favorably with other treatment modalities such as vascularised free tissue transfer or Papineau type grafting procedures. The treatment period is lengthy and both major and minor complications are common but limb salvage is successful in the main part. More aggressive treatment and appropriate fracture management in the early stages may have a role to play in improving the prognosis of these patients.
*Association for the Study and Application of the Methods of Ilizarov
The abstracts were prepared by Raymond Moran. Correspondence should be addressed to him at the Irish Orthopaedic Assocation, c/o Cappagh National Orthopaedic Hospital, Finglas, Dublin 11, Ireland.
