When knee or hip pain begins to interfere with everyday activities, joint replacement may be worth considering. But how do you know when it is time for surgery—and what does recovery really involve?

Orthopedic surgeon Dr. Daniel Karns discusses the most common reasons people need knee or hip replacement, nonsurgical treatments that may help delay surgery and advances that have changed joint replacement over the years. He also explains what patients can expect before and after surgery, the important role of physical therapy and the activities many people can return to following recovery.