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Cartilage Restoration (Oats, Microfracture, Allograft Transplantation)
Dr. James Chen, M.D. - In San Francisco, CA



Dr. Chen's technique for arthroscopic OATS


Surgical procedures performed to treat articular cartilage defects of the knee.

The OATS procedure consists of grafting a section of articular cartilage from a non-weight bearing area to the defect of concern. The cartilage graft is removed with the underlying bone. The recipient site is prepared by drilling a socket that will accommodate the graft. The graft is then inserted into the prepared site.


Microfracture Technique

The microfracture technique stimulates cartilage growth by drilling multiple, tiny holes in the defect. This allows stem cells and bone marrow elements to migrate to the bone surface and promote cartilage repair.

An allograft transplant utilizes an articular cartilage and bone graft similar to the OATS procedure, but the graft is harvested from a cadaver donor.


Evaluation of OATS Repair

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Dr. Chen in Surgery


OATS
Schematic

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OATS
Implantation

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OATS Implantation
with Snowman Technique

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Donor allograft

femur

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Allograft plug

harvesting

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Arthroscopic view of large trochlear chondral lesion

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Open view of

chondral lesion

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Coring out of

recipient site

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Cored recipient

trochlear site

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OATs plug

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OATs plug

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OATs implantation

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Implanted

OATs

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Arthroscopic view of

implanted OATs

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Remnant donor

allograft femur

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