- Clinical: Tactile assessment of bone quality reflecting the percentage of calcified bone to marrow, determined during osteotomy preparation. Usually classified from D1 (dense) to D4 (porous). Other classifications exist.
- Histological: The “density” is calculated from the percentage of all bone tissue that is constituted by mineralized bone.
- Radiographic: An estimate of the total amount of bone tissue (as bone mineral) in the path of one or more x-ray beams, as measured by Hounsfield units. When in quotes, “density” is as defined in absorptiometry, and does not mean density as used in physics.
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