Knee replacement, clinically known as knee arthroplasty, is a surgical procedure designed to correct complications with joint pain and functionality. Artificial joints (prosthesis) are devices used to replace the damaged components of the knee. Partial or total knee replacements can be performed by an orthopedic surgeon depending on the severity of the disease and its debilitating nature. People inflicted with osteoarthritis and rheumatoid arthritis are at greater risk for knee replacement. Surgical intervention might also be considered in response to acute injuries involving meniscus or ligament tears. As with any surgical procedure, significant scarring is an inevitable result for many post-operative patients.