Avenir® Cemented Hip Stem - PMCF

Inclusion Criteria: * Patient is 18 years of age minimum. * Patient is suffering from severe hip pain and disability requiring primary unilateral or bilateral total hip arthroplasty based on physical exam and medical history. * Patient is willing and able to cooperate in the required post-operative therapy. * Patient is willing and able to complete scheduled follow-up evaluations as described in the Informed Consent. Exclusion Criteria: * Patient is unwilling or unable to give consent, or to comply with the follow-up program. * Acute, chronic, local, or systemic infections. * Severe muscular, neural, or vascular diseases that endanger the limbs involved. * Lack of bony structures proximal or distal to the joint, so that good anchorage of the implant is unlikely or impossible. * Total or partial absence of the muscular or ligamentous apparatus. * Any concomitant diseases that can jeopardize the functioning and the success of the implant. * Allergy to the implanted material, especially to metal (e.g., stainless steel). * Local bone tumors and/or cysts. * Pregnancy * Skeletal immaturity * Patients who have any condition that would in the judgment of the Investigator place the patient at undue risk or interfere with the study. Any patient who is institutionalized, a known drug abuser or alcoholic or anyone who cannot understand what is required of them. * Patients with plans to relocate during the study follow-up period. * For patients biologically younger than 60 years with joint disease, a different reconstruction operation (e.g., osteotomy) or arthrodesis may be indicated.