Trident® Tritanium™ Acetabular Shell Revision Study

1. Males and non-pregnant females, 21-85 years of age at the time of surgery.

2. Patient is a candidate for a revision of a failed acetabular component with a cementless acetabular component.

3. Patient has signed an IRB approved study consent form.

4. Patient is willing and able to comply with postoperative requirements including postoperative weight bearing restrictions and self-evaluations.

1. Patient is morbidly obese, BMI > 40.

2. Patient has a systemic or metabolic bone disorder leading to progressive bone deterioration.

3. Patient is immunologically compromised or receiving steroids in excess of normal physiological requirements (> 30 days).

4. Patient's bone stock is compromised by disease or infection which cannot provide adequate support and/or fixation to the prosthesis.

5. Patient has an active or suspected latent infection on or about the hip joint.

6. Patient is a prisoner.