The number of joint replacements is soaring in the U.S., as more than a million people a year are getting total replacements, usually for a hip or knee. As baby boomers age and their joints wear out from a variety of causes, these operations are expected to increase. Featuring a board-certified orthopedic surgeon who specializes in hip and knee replacements, this edition of Physician Focus provides an introduction to the medical procedures of joint replacements. Among the topics of conversation are why more people are getting joint replacements, how they are done, and what patients need to know before, during, and after surgery.