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Supracondylar nail failure: two case reports.

We describe two case reports of supracondylar nail failure in young patients who had sustained high energy, closed, comminuted supracondylar femoral fractures. These injuries had been successfully treated using retrograde intramedullary nails which failed several months later because of excessive activity on the part of the patient without the presence of full flexion at the knee. The failed implants were removed and dynamic condylar screws were inserted with bone graft to the fracture site. This revision procedure produced solid bony union. We recommend that these patients should not fully weight bear, or engage in strenuous physiotherapy after nailing, until the fracture has consolidated and a functional range of knee motion has been obtained. Failed implants should be managed by nail removal, bone grafting and insertion of a dynamic condylar screw.