ARTHRITIS FOUNDATION, arthritis.org
Click for info about osteoarthritis and its treatments
AMERICAN 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 wrist
MAYO CLINIC, mayoclinic.com
Go to "Diseases & Conditions," and you can find osteoarthritis under either "A" or "O"