Orthopedist: An orthopedic surgeon, a physician who corrects congenital or functional abnormalities of the bones and treating injuries to the bones. Sometimes spelled orthopaedist.
Middle-agers are the fifty something's whose knee joints are getting worn out. It's all those previous years of wear and tear on the knees that start to add up. From partial meniscus tears, to arthritic knees most the time the pain originated from an old knee injury or as a result of the life they have lived.
Doctor Jeff Mason discusses nightstick fractures, a characteristic fracture when one tries to ward off an overhead blow from a nightstick.