Osteoarthritis (OA) is one of the leading causes of chronic pain, disability and lost productivity in Australia. This form of arthritis is commonly described as ‘wear and tear’ or degenerative arthritis. Approximately half of all adults older than 50 years may have radiological changes showing OA, although not all will be symptomatic. Osteoarthritis is a synovial joint disorder that involves the whole joint, including cartilage, bone, synovial membrane, as well as impacting upon surrounding muscles and ligaments. Damaged cartilage leads to inflammation leading to further joint damage. Although osteoarthritis can affect any small or large joint, the most common joints affected are weight bearing joints and those that are used most often.