Knee replacement surgery is usually recommended for severe arthritis. When other treatments  and life style changes have failed to resolve pain and disability, knee replacement could be beneficial.  

Knee replacements are generally successful in majority of the patient. It is particularly helpful in reducing pain and disability. The procedure is also effective in improving quality of life and correcting deformity. Finally, a successful knee replacement can significantly reduce the need for regular painkillers and  dependance  on walking aids