Knee replacements are one of the most common types of arthroplasties. Surgeons in the U.S. perform more than 850,000 knee replacements each year. By 2030, total knee replacement surgeries are projected to grow 673% to 3.5 million procedures per year. About 60% of all knee replacement operations are performed on women. Approximately 85% of knee replacements will last for 20 years. Nearly 1/2 of American adults will develop knee osteoarthritis in at least one knee in their lifetime. 80% of osteoar