Ceramic On Ceramic (COC) 36mm PAS IDE Rollover Subjects; Ceramic Acetabular Bearing With Ceramic Femoral Head in Total Hip Replacement

Up to five (5) sites will participate. These sites participated in the IDE study and will
continue subject follow-up.

Subjects from the original IDE study (COC 36mm investigational subjects only) will be seen
for a clinic visit at the time of consent (First visit at approximately 5 to 7 years post-op
or 1825- 2919 days), and at minimum 8 years (2920-3649 days) , and minimum 10 years
(3650-4015 days). Harris Hip evaluation, radiographic evaluation, subject hip-outcomes, and
adverse event information will be collected at each visit.

If a subject is not willing or able to return for a clinical and radiographic follow-up for
either the minimum 8 year evaluation or the minimum 10 year evaluation, then a telephone
interview may be utilized for the purpose of determining device survivorship.

Inclusion Criteria:

- Subjects who were previously enrolled in the COC 36 IDE study;

- Individuals who are willing and able to provide informed patient consent for
participation in the study;

- Individuals who are willing and able to return for follow-up as specified by the study
protocol; and

- Individuals who are willing and able to complete the Subject Hip Outcomes
questionnaire as specified by the study protocol.

Exclusion Criteria:

- In the opinion of the Investigator, the individual does not qualify if there are any
concerns with the ability to follow the protocol specified evaluations.

- Any component of the primary total hip was previously revised.