and other side effects. Joint replacement surgery may be an option if there is ongoing disability despite other treatments. More than 90% of hip and knee joint replacements are due to osteoarthritis. An artificial hip or knee joint typically lasts more than 20 years.

Osteoarthritis is the most common form of arthritis, affecting about 237million people or 3.3% of the world's population as of 2015. It becomes more common as people age. Among those over 60 years old, about 10% of males and 18%