Restoration Anatomic Acetabular Shell Revision Study

Inclusion Criteria: * Subject is a candidate for a revision of a failed acetabular component with the Restoration Anatomic Acetabular Shell. * Subject has signed an IRB-approved, study specific Informed Consent Form (ICF). * Subject is skeletally mature. * Subject is a male or non-pregnant female. * Subject is willing and able to comply with postoperative scheduled clinical evaluations. Exclusion Criteria: * Subject has a non-Stryker retained stem at the time of study device implantation. * Subject has a Body Mass Index (BMI) \> 45. * Subject has an active or suspected latent infection in or about the affected hip joint at time of study device implantation. * Subject has a mental or neuromuscular disorder which would create an unacceptable risk of prosthesis instability, prosthesis fixation failure, or complications in postoperative care. * Subject has compromised bone stock which cannot provide adequate support and/or fixation to the prosthesis. * Subject is diagnosed with a systemic disease (e.g. Lupus Erythematosus) or a metabolic disorder (e.g. Paget's Disease) leading to progressive bone deterioration. * Subject is immunologically suppressed or receiving steroids in an excess of normal physiological requirements (e.g. \> 30 days). * Subject has a known sensitivity to device materials. * Subject is a prisoner.