<prompt> The operative procedure is known as microfracture is done for theDelayed union of femur.Non union of tibiaLoose bodies of ankle jointOsteochondral defect of femur  <response>: Ans. is d i.e. Osteochondral defect of the femurRef. Various internet sites is an arthroscopic procedure used to treat osteochondral defects damaged areas of articular cartilage of the knee 