Cartilage is the flexible substance that helps to cushion the joints so that pieces of bonecan't rub together as you walk. Unfortunately, there are many ways in which damage can happen within cartilage, and therefore contribute to chronic knee pain conditions. One type of injury to the cartilage of the knee is known as a torn meniscus. The meniscus is the largest section of cartilage attached to the ligaments of the knee. Alternatively, your cartilage may just suffer from the constant wear…