Fig. 2.

A 66-year-old male who sustained a femoral neck fracture treated with uncemented total hip arthroplasty. Post-operatively he complained of unspecific pain with only slightly elevated infection markers. a) Three years later loosening of the acetabular component was diagnosed with marked osseous defect periacetabular and signs of osteolysis around the proximal part of the stem. b) One stage exchange with uncemented components. The defects were filled with antibiotic impregnated bone Osteomycin V. Sonification of explanted material revealed growth of two strains of Staph. epidermidis (MSSE) and Propionibact. sp. Hospital stay was one week, with Cefuroxim intravenously, followed by six weeks of Amoxicillin/Clavulanic acid and Rifampicin orally. c) six months post-operatively the patient is painfree with no sign of infection and unlimited mobility. There is partial remodelling of the allograft.