Our bodies naturally make hyaluronic acid, which helps lubricate and cushion joints. When you have osteoarthritis, hyaluronic acid is depleted in the affected joints. Hyaluronic acid or visco supplementation injections put the deficient lubrication back into the joint, decreasing friction and inflammation. This helps preserve existing cartilage. These injections are all performed under imaging such as ultrasound and live fluoroscopy.