Taperloc Complete Stems for Hip Problems

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 * Patient must have undergone primary or revision hip arthroplasty with the -Taperloc Complete stem according to a cleared indication, which includes the following: * Non-inflammatory 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 Exclusion Criteria: * Off-label use * Infection * Sepsis * Osteomyelitis * Uncooperative patient or patient with neurologic disorders who are 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 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 for proper informed consent