ASK THE DOCTORS
Dear Doctors: Our 16-year-old son recently broke his arm skateboarding.
He had to have surgery, and now he's in a cast. I broke my arm back when I was a boy, but all I needed was a cast. Why does a broken arm need surgery? How long does it take for that kind of break to heal?
Dear Reader: Our bones are a miracle of engineering. Made up largely of collagen, a protein that provides a pl…