Hi, my name is David A. Padden, M.D., an orthopedic surgeon specializing in total and partial joint replacement of the hip and knee. Welcome to my website. I am one of the pioneers in robotic total hip replacement surgery in the United States, having performed several hundred of these procedures at present, and currently one of the top five surgeons in the U.S. in experience with this exciting technology. My specialty services include state of the art muscle-sparing(no muscles cut) antero-lateral robotic total hip replacement surgery, computer navigated total knee replacement, revision(re-do) joint replacement (hip and knee), and arthroscopic surgery of the knee and shoulder. My particular specialty interest is the treatment of avascular necrosis(osteonecrosis) of the hip and knee. I hope this website is helpful in keeping my patients informed and updated about the problems I specialize in treating, and ensure them I remain a leader in orthopedics with some of the most cutting-edge treatment options available in the world of joint replacement today.