Triathlon Total Stabilizer (TS) Outcomes Study

Inclusion Criteria:

- Patient has signed an IRB approved, study specific Informed Patient Consent Form.

- Patient is a male or non-pregnant female age 18 years or older at time of study device
implantation.

- Patient is a candidate for revision of all femoral and tibial components of a total
knee replacement.

- Patient is willing and able to comply with postoperative scheduled clinical and
radiographic evaluations and rehabilitation.

Exclusion Criteria:

- Patient has a Body Mass Index (BMI) > 40.

- Patient has an active or suspected latent infection in or about the affected knee
joint at time of study device implantation.

- Patient has a neuromuscular or neurosensory deficiency, which limits the ability to
evaluate the safety and efficacy of the device.

- Patient is diagnosed with a systemic disease (e.g. Lupus Erythematosus) or a metabolic
disorder (e.g. Paget's Disease) leading to progressive bone deterioration.

- Patient is immunologically suppressed or receiving steroids in excess of normal
physiological requirements (e.g. > 30 days).

- Patient has a failed unicondylar knee prosthesis.

- Patient has a known sensitivity to device materials.

- Patient is a prisoner.