The operative procedure known as "microfracture" is done for the

D i.e. Osteochondral defect of femur Chondral & osteochondral fractures (osteochondritis dessicans) present clinically with meniscal symptoms of locking, catching & giving way of the knee. Ahroscopy is investigation of choice and preferred way of treatment All loose & overhanging pieces of cailage must be removed back to a stable base. The base may be drilled, abraded or microfracturedQ to bleeding bone that presumably recruit-pleuripotent stem cells to regenerate cailage. Osteochondral autograft transplant should be considered.