G7 Freedom Constrained Vivacit-E Liners

Inclusion Criteria: * Patient is 18 to 80 years of age, inclusive * Patient is skeletally mature * Patient qualifies for unilateral total hip arthroplasty based on physical exam and medical history including at least one of the following: * Non-inflammatory degenerative joint disease, including osteoarthritis and avascular necrosis * Rheumatoid arthritis * High risk for dislocation * Undergoing revision hip arthroplasty * Correction of functional deformity * In need of treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable by other techniques * Patient is willing and able to complete scheduled follow-up evaluations as described in the protocol and Informed Consent * Patient, or the patient's legally authorized representative, has participated in the Informed Consent process and is willing and able to sign an IRB approved informed consent Exclusion Criteria: * Patient is septic, has an active infection or has osteomyelitis at the affected joint * Patient has significant osteoporosis as defined by treating surgeon * Patient has metabolic disorder(s) which may impair bone formation * Patient has osteomalacia * Patient has distant foci of infections which may spread to the implant site * Patient has rapid joint destruction, marked bone loss or bone resorption on pre-operative radiographs * Patient underwent contralateral THA within 3 months of planned index procedure or has a contralateral THA planned within 3 months of the index procedure * Patient is undergoing simultaneous bilateral THA * Patient has vascular insufficiency, muscular atrophy at the implant site or neuromuscular disease which might jeopardize the outcome of the surgery. * In the opinion of the investigator, patient has any concomitant disease which is likely to jeopardize the functioning or success of the implant * Patient is known to be pregnant * The patient is in the vulnerable population group, such as * a prisoner * a known alcohol or drug abuser * mentally incompetent or unable to understand what participation in this study entails