H-34 DELTA Revision Cup

Inclusion Criteria: * male or female in whom a decision has already been made to perform a total hip arthroplasty with DELTA Revision acetabular cup as per indication for use. The decision to implant DELTA revision acetabular cup must be taken prior to, and independently from the decision to enroll the patient. This decision should be made in accorsance with routine clinical practice at the study site concerned. * Age ≥ 18 years old * All patients mist give written informed consent approved by the study site's Institutinal Review Board (IRB)/Ethical Committee (EC) * Patient is able to comply with the protocol Exclusion Criteria: * Adult patients with any DELTA Revision acetabular cup contraindication for use as reported in the current local instruction for use. * For female patiens, current pregnancy and/or lactation or planning a pregnancy