Signature Acetabular Posterior/Lateral Data Collection

Inclusion Criteria: * Subjects with one of the following indication: * Noninflammatory degenerative joint disease including osteoarthritis and avascular necrosis. * Rheumatoid arthritis. * Correction of functional deformity. * Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable by other techniques. Additional inclusion criteria include: * Subjects requiring primary total hip arthroplasty * 20 to 75 years of age * Subjects with a diagnosis of osteoarthritis or traumatic arthritis * Subjects willing to return for follow-up evaluations. * Subjects who can read, understand study information and give written consent without representation of a legally authorized representative. * Bilateral patients are included if staged. * Only Posterior Lateral Approach can be used for inclusion in this study Exclusion Criteria: \- Exclusion criteria should be in accordance with Contraindications for the Biomet primary acetabular cup. Absolute contraindications include: infection, sepsis, osteomyelitis, and failure of a previous joint replacement. Additional contraindications include: * Subjects whose bony structure deviates substantially from the general norm sufficiently to require non-standard implants. Specific examples of these are total dislocation of the hip, severe coxa vera deformity, and severe forms of multiple epiphyseal dysplasia * Subjects unable to cooperate with and complete the study * Dementia and inability to understand and follow instructions * Neurological conditions affecting movement * Pregnancy Additional exclusion criteria include: * Surgical approach other than posterior lateral. * Simultaneous bilateral procedures