More than a million Americans have a hip or knee replaced each year. Joint replacement isn't just for seniors. More younger adults are considering joint replacement with new developments and materials that allow replacements to last much longer. When weight loss, exercise, injections and other therapies don't result in pain relief - joint replacement could be the best option. Check out 5 Things You Need to Know About Joint Replacement with Dr. Efrain Paz Jr., Orthopedic Surgeon with Lourdes Medical Associates.