Are knee imoblizers really needed after microfracture knee surgery. why?

Microfracture: Different surgeons have different protocols and you should discuss with your surgeon. Typically, motion of the knee and non weight bearing (WB) are used postop for about 6 wks. There are exceptions. If the micro fracture was in the kneecap joint a knee immobilizer may be used to reduce WB knee flexion and WB with a straight leg may be permitted. Some docs use less restrictive protocols however.