Cementless Alumina-Alumina Total Hip and Hybrid

Inclusion Criteria:

- Patients with inflammatory tissue disorders (e.g. rheumatoid arthritis, lupus, etc),
osteoarthritis, post-traumatic arthritis or secondary arthritis, or avascular
necrosis.

- Less than 70 on preoperative HHS score

- Primary total hip replacement

- Patient is likely to be available for evaluation for the duration of the study.

Exclusion Criteria:

- Patients with physical conditions that would eliminate adequate implant support or
prevent the use of an appropriately sized implant (e.g., tumor)

- Previous surgery that has adversely affected bone stock (such as some hip pinning or
some osteotomies) or prior total hip replacement.

- Insufficient quality or quantity of bone resulting from conditions such as:

- Cancer, where radiation has destroyed the available bonestock

- Congenital dislocation

- Metabolic bone disease of the upper femur or pelvis

- Femoral osteotomy revision

- Girdlestone revision

- Active infection of the hip joint

- Old or remote infection

- Other conditions that lead to inadequate skeletal fixation

- Neurological conditions that might hinder patient's ability to follow study
procedures, e.g., to restrict physical activities (e.g., Severe Parkinson's, CVA on
affected side)

- Patient's mental condition that may interfere with his ability to give an informed
consent or willingness to fulfill the required follow-up of the study

- Mental illness

- Senility

- Drug Abuse

- Alcoholism

- Conditions that place excessive demands on the implant

- Charcot's joints

- Muscle deficiencies

- Multiple joint disabilities

- Refusal to modify postoperative physical activities

- Skeletal immaturity

- Obesity (50% over recorded body weight mass index)

- Greater than or equal to 70 on preoperative HHS score