Osteoarthritis is the most common form of arthritis, affecting millions of people around the world. Often called wear-and-tear arthritis, osteoarthritis occurs when the protective cartilage on the ends of your bones wears down over time and bone damager occurs. While osteoarthritis can damage any joint in your body, the disorder most commonly affects joints in your hands, neck, lower back, knees and hips. The condition gradually worsens with time, but osteoarthritis treatments can slow the progression of the disease, relieve pain and improve joint function. Injecting adult stem cells has shown great efficacy in rebuilding the absent cartilage.