ABSTRAKIn prosthodontics, mandibular bone density plays an important role in the success of treatment. Generally, the aging process will be accompanied by decreasing mandibular bone density. This is more obvious in post menopausal women with low or absent estrogen production. Relationship between mandibular bone density and bone density in other parts of the body is still debatable. The aim of this study was to evaluate this relationship. Periapical radiographs and bone densitographs of 114 post menopausal women were evaluated in a cross sectional study. The results showed a relationship between age and amount of teeth present with decreasing mandibular bone density, and a significant correlation between mandibular bone density and lumbal or femur bone density.