`Arthroscopic knee surgery tool design and materials selection`

A number of years ago I was consulting for a division of Johnson & Johnson, when arthroscopic knee surgery was big. When I was your age, I had a torn cartilage in my left knee — I matched it a few years ago with one in my right knee. If I wanted to get an operation to repair that cartilage in the late 1960s when it happened to me, they would have to lay your whole knee open to get in there, and you would be in a cast for six months, on crutches for a year. I decided I could live with the torn cartilage. I can hear it click. Even today, if I get my head down there near my knee and move my knee back and forth, I can hear the cartilage click. I can even feel it sometimes.