| Aging |
| 1. Osteoarthritis in patient not a candidate for total knee arthroplasty |
| 2. Osteoarthritis in patient not wanting a contralateral total knee arthroplasty |
| Injury |
| 3. Sports-related, with normal MRI, not responding to sports medicine Rx |
| 4. Work-related, with normal MRI, not responding to pain management |
| Iatrogenic |
| 1. Sports-related, s/p operative approach to ligamentous/osseous reconstruction |
| 2. Work-related, s/p operative approach to ligamentous/osseous reconstruction |
