Cementless One-stage Revision of the Chronic Infected Hip Arthroplasty

Inclusion Criteria: * Patient with clinical signs of infection for more than 4 weeks, arising from total hip arthroplasty (primary and revision), resurfacing hip arthroplasty or hemi-hip arthroplasty * Informed oral and written consent given Exclusion Criteria: * Life expectancy under 2 years * Cognitive dysfunction * Pre-operative unwillingness to receive blood * Intravenous drug abuse * Alcoholism * Immunocompromised patients * Patients receiving immunosuppressive medication * Ongoing systemic inflammatory disease * Poorly regulated diabetes mellitus * Renal failure (requiring dialysis) * Acute systemic inflammatory response syndrome with proven infection (sepsis) * Signs of coexisting active long-term local infection (i.e. endocarditis) * Previous two-stage revision of hip arthroplasty due to ipsilateral chronic infection (regardless of symptom free interval) or contralateral chronic infection (within the last 2 years). * \< 6 weeks since last surgery of the affected hip * If definition of infection is not fulfilled: infection defined as Culture positive: ≥ 3 positive intraoperative cultures (tissue biopsies a.m. Kamme-Lindberg) Culture negative: \< 3 positive intraoperative cultures (tissue biopsies a.m. Kamme-Lindberg) + Chronic fistula with history of previous or existing secretion or Positive cultures in pre-operatively joint fluid aspiration with other clinical signs of infection or Visual pus or purulent fluid during exchange procedure with clinical signs of infection