Have knee cartilage damage. one doc wants to do microfracture but another says oats--allograft kind. how do i decide?

No right answer : Both can work might want to get a third opinion or even more.

Microfracture: Microfracture is appropriate for any defect less than 1 cm. Oats allograft is appropriate for any defects greater than two and 1/2 cm. Autograft oats is usually appropriate in between these sizes. Try discussing your options with your surgeon. Best of luck!