MDR - Longevity IT Oblique and Offset Liners

Inclusion Criteria: * Study devices must have been implanted following the appropriate surgical technique and IFU * Patient must be 18 years of age or older * Patient must be willing and able to sign or verbally consent using the IRB approved informed consent * Patient must have undergone primary or revision hip arthroplasty with the Longevity IT Oblique and/or Offset liners according to a cleared indication, which includes the following: * Noninflammatory degenerative joint disease including osteoarthritis and avascular necrosis, protrusio acetabuli, traumatic arthritis, slipped capital, epiphysis, fused hip, fracture of the pelvis, and diastrophic variant * Revision where other devices or treatments have failed * Patient must have reached full skeletal maturity Exclusion Criteria: * Off-label use of study devices * Osteoradionecrosis * Neuromuscular compromise, vascular deficiency or other conditions in the affected limb that may lead to inadequate skeletal fixation * Systemic or local infection * Uncooperative patient or patient with neurologic disorders who is incapable of following directions * Patient is known to be pregnant or nursing * Patient is a prisoner * Patient is a known alcohol or drug abuser * Patient has a psychiatric illness or cognitive deficit that will not allow for proper informed consent