G7 BiSpherical Acetabular Shell PMCF Study

Inclusion Criteria: * Patient capable of understanding the surgeon's explanations and following his instructions, able and willing to participate in the follow-up program and who gave consent to take part in the study. * Patient aged of 18 years or more whose skeleton reached bone maturity. * 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. * Revision procedures where other treatment or devices have failed. Inclusion criteria specific for patients receiving the G7 BiSpherical Shell with the G7 Freedom Constrained Liner: * The Biomet G7 Freedom Constrained Liner is indicated for use as a component of a total hip prosthesis in primary and revision patients at high risk of dislocation due to a history of prior dislocation, bone loss, joint or soft tissue laxity, neuromuscular disease, or intraoperative instability, and for whom all other options to con-strained acetabular components have been considered. Exclusion Criteria: Absolute exclusion criteria include: * Infection, sepsis, osteomyelitis. Relative exclusion criteria include: * Uncooperative patient or patient with neurologic disorders who is incapable of following directions. * Osteoporosis. * Metabolic disorders which may impair bone formation. * Osteomalacia. * Distant foci of infections which may spread to the implant site. * Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram. * Vascular insufficiency, muscular atrophy or neuromuscular disease. * Patient unwilling or unable to give consent, or to comply with the follow-up program. * Patient known to be pregnant or breastfeeding. * Patient presenting any condition that would, in the judgment of the Investigator, place the patient at undue risk or interfere with the study. * Patient institutionalized or known drug abuser or alcoholic or anyone who cannot understand what is required of them. * Patient belonging to a vulnerable population. Exclusion criteria specific for patients receiving the G7 BiSpherical Shell with the G7 Freedom Constrained Liner: * Bone or musculature compromised by disease, infection, or prior implantation that cannot provide adequate support or fixation for the prosthesis.