Orthopedic surgery deals with conditions of the musculoskeletal system. Orthopedic surgeons use surgical and non-surgical methods to treat degenerative diseases, tumors, sports injuries, congenital disorders, and musculoskeletal trauma. Diagnostic tools used include digital x-rays, CT scans, fluoroscopy, electrodiagnostic testing, and MRI. Surgeries involve adding materials like screws, wires, and prosthetics to repair bones and connective tissue. Rehabilitation after surgery may include medication, exercises, physical therapy, and preventing injury and infection. Celebrities who have had orthopedic surgery include Lance Armstrong, Peyton Manning, Dara Torres, Tom Brady, and Princess Eugenie.