MDR - PMCF Study for RingLoc Bipolar Acetabular Cup

Inclusion Criteria:

• Patient must be 18 years of age or older and skeletally mature

• Patient must be willing and able to sign IRB approved informed consent

• Non-inflammatory degenerative joint disease including osteoarthritis and avascularnecrosis

• Rheumatoid arthritis

• Correction of functional deformity

• Treatment of non-union, femoral neck fracture and trochanteric fractures of theproximal femur with head involvement, unmanageable by other techniques

• Revision procedures where other treatment or devices have failed

Exclusion Criteria:

• Off-label use

• Uncooperative patient or patient with neurological disorders who are incapable offollowing 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 onroentgenogram

• Vascular insufficiency, muscular atrophy, or neuromuscular disease

• Infection

• Sepsis

• Osteomyelitis

• 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 forproper informed consent

• Patient is unwilling to sign an informed consent