summaryTransverse sections, 3–4 cm long, were obtained post mortem from the radii and from edentulous mandibles of fifty patients (twenty‐four females and twenty‐six males) aged 46–92 years. The mineral density of the sections was measured by roentgen absorption. A significant negative correlation was found between the mineral density and age (P<0.01). A statistically significant correlation was found between the variation of the mineral density of the mandible and that of the radius (