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Despite the advances achieved in reconstructive surgery, amputation is still the only option after some severe traumas. Preservation of the knee joint is considered a significant functional advantage. We present the case of a 39-year-old man with a comminuted Gustilo type IIIC open tibia fracture with massive bone loss. To achieve a well-fashioned amputation stump and preserve the knee joint, a free osteocutaneous fillet flap was performed, including the distal tibia and fibula, talus, and calcaneus bones. As a result, a sensate and long amputation stump covered with thick skin from the sole of the foot provided a stable coverage with an excellent functional result and adjustment to prosthesis.

Chronic infections following posterior fusion are relatively uncommon. They develop in a previous asymptomatic patient at a distant time from the surgery. Chronic infections arise from direct inoculation or hematogenous seeding. To eradicate a chronic infection, the pathogens, biofilm, non-viable tissues, adherence on surfaces, and instrumentation must be removed. The appropriate antibiotherapy is used in a short (4 weeks) or long protocol (9 weeks). Some patients may need repeated surgeries (leaving the instrumentation in situ) to avoid progressive deformity or symptomatic pseudoarthrosis in cases of implant removal.

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