synonyms: OATS, mosiacplasty, osteoarticular autograft transfer
- <3cm2 Grade IV chondral lesion
- Limb malalignment
- Arthritic changes
OATs Planning / Special Considerations
- Associated malalignmnet must be corrected before any cartilage restoration procedure. Most isolated lesions involve the MFC and can be associated with varus alignment. Concomitant HTO is indicated.
- Arthrex Oats system or Mitex COR system
- Perform diagnostic knee arthroscopy.
- Typical harvest site is the intercondylar notch and the periphery of the lateral trochlea just proximal to the sulcus terminalis.
- Continued symptoms
OATs Follow-up care
- Post-op: 6hrs/day CPM, NWB x6wks unless lesion treated was patellofemoral.
- 7-10 Days: Wound check, continue CPM, NWB
- 6 Weeks: Discontinue CPM, advance to full weight bearing
- 3 Months: Resume all normal ADLs.
- 6 Months: Gradually begin running / sport specific rehab.
- 1Yr: Return to sport / full duty. Return to high-impact activites after treatment of large defects is not recommened.
- 92% good/excellent result for femoral condyles, 87% tibia, 79% patellofemoral, 94% talar dome (Hangody L, JBJS Am, 2003;85(sup2):25).
OATs Review References