How can we use the diameter to calculate the medullary index?

The medullary index is calculated by comparing the diameter of the medullary cavity to the diameter of the entire bone. To find the medullary index, you divide the diameter of the medullary cavity by the total diameter of the bone and then multiply the result by 100 to express it as a percentage. This index helps assess the relative size of the medullary cavity in relation to the overall bone structure, which can be useful in fields like anthropology and forensic science.