Bionic body parts may have sounded like science fiction 40 years ago. But today, medicine has advanced to where the regeneration and replacement of body parts are common. Dr. Partha Nandi talks with an orthopedic surgeon about state-of-the-art treatments for hip, back and shoulder injuries, as well as damaged tissue and organs. Plus, Dr. Nandi looks at alternative remedies, including acupuncture and exercises for the joints.