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. * Osteomalaci…