REIMPLANTATION OF INFECTED HIP ARTHROPLASTIES USING BONE ALLOGRAFTS

Twenty-two patients with deep infection of an hip prosthesis received delayed reimplantation using bone allografts, Sixteen were done using noncemented components and 6 using femoral components that mere fixed with antibiotic impregnated cement, Bulk allografts were used at the a cetabular site in 2 patients and at the femoral site in 4 patients, Mo rselized allografts mere used at the acetabular site in 20 patients an d at the femoral site in 10 patients, The causative organisms were vir ulent in 10 hips and low virulent in 12 hips, At an average followup o f 4 years (range, 2-7 years), 91% of patients mere free of infection a nd 73% had a successful functional result, Two had a recurrent infecti on; 1 of them had a pseudomonas infection and another had a methicilli n resistant Staphylococcal infection, The recurrence of infection tend ed to be higher if the causative organism was virulent. The use of bon e allografts at tile staged reimplantation of the infected hip arthrop lasty did not increase the incidence of recurrent infection, Both ceme nted and noncemented reimplantations had a successful result in eradic ating the infection, However hybrid reimplantation with a cemented fem oral component and fixed porous acetabular component had a better func tional outcome than noncemented reimplantation sing porous femoral com ponent and non-fixed acetabular component.