The Osteoarticular Transfer System is surgical procedure to core out a damaged bit of joint cartilage and replace it with a healthy bit from a donor.

prepared defect for OATS graft

A defect in the cartilage is prepared for grafting by coring out bone and cartilage.

OATS - osteoarticular transfer system

A plug of healthy bone and cartilage is press-fitted into the hole to replace the original tissues.


Technique of osteoarticular transfer system

The recipient hole is prepared to a depth not exceeding one centimetre. The core of donor bone is taken from the donor femur and press-fitted into the prepared recipient area. Patients need to be non-weight-bearing for several weeks and have daily CPM to keep the joint moving gently so that the new bone and cartilage can fully integrate.


Surgical cartilage repair for knee osteoarthritis

An overview of the various options available for surgical cartilage repair of the knee.

Surgery to slow established patellofemoral arthritis

Part 9 of a course on Patellofemoral Pain by Dr Ronald Grelsamer of Mount Sinai Hospital in New York.



Failed OATS-How Do I Know.

How do you choose ACI vs OATS???

OATS - successful!


Refrigerated osteoarticular allografts to treat articular cartilage defects of the femoral condyles. A prospective outcomes study. LaPrade RF, Botker J, Herzog M and Agel J. J Bone Joint Surg Am. 2009 Apr;91(4):805-11. doi: 10.2106/JBJS.H.00703.

Distal Femoral Osteoarticular Allografts: Long-term Survival, But Frequent Complications. Toy PC, White JR, Scarborough MT, Enneking WF and Gibbs CP. Clin Orthop Relat Res. 2010 Nov; 468(11): 2914–2923.

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