MDR - PMCF Study for RingLoc Bipolar Acetabular Cup and Endo II Femoral Heads

Inclusion Criteria:

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

• Patient must have undergone hip hemiarthroplasty surgery with the RingLoc BipolarAcetabular Cup or Endo II Femoral Head for a cleared indication, greater than orequal to eight years previous to the date of study consent. Cleared indications forthe RingLoc Bipolar and Endo II Heads include the following:

• Noninflammatory degenerative joint disease including osteoarthritis andavascular necrosis

• Rheumatoid arthritis

• Correction of functional deformity

• Treatment of non-union, femoral neck fracture, and trochanteric fractures ofthe proximal femur with head involvement, unmanageable using other techniques.

Exclusion Criteria:

• Any medical diagnosis present at the time of surgery that, at the Investigator'sdiscretion, could compromise the implant's survivability

• Off-label use or not according to the approved instructions for use (IFU) of studydevices

• Revision procedures where other treatment or devices have failed

• Uncooperative patient or patient with neurologic disorders who is incapable offollowing directions

• Patient has a psychiatric illness or