Trident II Revision Outcomes Study

Inclusion Criteria: A. Patient has signed an IRB approved, study specific Informed Patient Consent Form. B. Patient is a male or non-pregnant female age 18-85 years of age at the time of study device implantation. C. Patient is a candidate for a revision of a failed acetabular component with a cementless acetabular component. D. Patient is willing and able to comply with postoperative scheduled clinical and radiographic evaluations. Exclusion Criteria: E. Patient has a Body Mass Index (BMI) \> 45. F. Patient is diagnosed with Inflammatory Arthritis. G. Patient has a non-Stryker retained stem. H. Patient has an active or suspected latent infection in or about the affected hip joint at time of study device implantation. I. Patient has a mental or neuromuscular disorder which would create an unacceptable risk of prosthesis instability, prosthesis fixation failure, or complications in postoperative care. J. Patient has compromised bone stock which cannot provide adequate support and/or fixation to the prosthesis. K. Patient is diagnosed with a systemic disease (e.g. Lupus Erythematosus) or a metabolic disorder (e.g. Paget's Disease) leading to progressive bone deterioration. L. Patient is immunologically suppressed or receiving steroids in excess of normal physiological requirements (e.g. \> 30 days). M. Patient has a known sensitivity to device materials. N. Patient is a prisoner.