I just had microfracture plus my own stem cells for my entire trochlea, three spots on my patella, and two spots on my femoral condoyles in Kuala Lumpur. Go to www.KLSMC.com. Dr. Saw has done it in over 300 patients, is getting type two collagen, and can treat bone on bone indications. Read the paper on the website. three centers in the US are starting this up now. This has many advantages vs ACI and microfracture alone, including the ability to actually create joint space and handling multiple lesions. All done through a scope.