Forty years ago, hip joint replacement surgery was a radical new procedure. Today some 300,000 hips are replaced annually. New techniques, technologies and materials mean people no longer have to postpone hip surgery for fear the implant will wear out. Now the determination is made by need, not age. “This is probably the best operation in medicine,” says internationally known hip surgeon Dr. Richard Rothman, whose Rothman Institute at Jefferson Hospital is one of the country’s big players in the field.