... periosteal and medullary diameters measured at the second metacarpal bone from infancy to young adulthood is illustrated.These observations at the second metacarpal bone are largely confirmed by ... step is characterized by addition of cartilage tissue to the growth plates of long bones. In the second step, the cartilaginous scaffold is transformed into bone tissue at the adjacent metaphyses. ... that at least 90% of peak bone mass at the lum-bar spine and femoral neck is acquired within the second decade of life [37, 44, 45]. However, in other skeletal sites, such as the radius, skull...