Clinical Research Directory

Inclusion Criteria: * A severely painful and/or disabled joint from osteoarthritis, traumatic arthritis, rheumatoid arthritis or developmental dysplasia of the hip. * Avascular necrosis of the femoral head * All subjects must be between the age of 18 and 75 at the time of surgery to take part in this study * Scheduled for a primary total hip replacement. Exclusion Criteria: * Active infection * Severe Obesity (BMI over 35) * Pregnancy * Mental illness * Grossly distorted anatomy (surgeon's discretion) * Sepsis * Osteomyelitis * Osteomalacia * Distant foci of infections * Osteoporosis * Metabolic disorders which may impair bone formation * Muscular atrophy or neuromuscular disease * Allergy to implant material * Marked bone loss or bone resorption * Patients without sufficient quantities of synovial fluid to allow for proper lubrication, such as patients with Sjogren's syndrome * Skeletally immature patients and cases where there is a loss of abductor musculature, poor bone stock or poor skin coverage around the hip joint which would make the procedure inappropriate * Any case not described in the inclusion criteria * Any patient who cannot or will not provide informed consent for participation in the study * Those whose prospects for a recovery to independent mobility would be compromised by known coexistent, medical problems.