ARTHRITIS FOUNDATION, arthritis.org

Click for info about osteoarthritis and its treatmentsAMERICAN ACADEMY OF ORTHOPAEDIC SURGEONS, aaos.org

The Patient/Public Information tab takes you to a page that lets you shop for information by joint, such as knees, shoulder, and wristMAYO CLINIC, mayoclinic.com

Go to "Diseases & Conditions," and you can find osteoarthritis under either "A" or "O"