Bone Demineralization, PathologicBone Demineralization TechniqueTooth DemineralizationOsteoporosisEstrogensBone and BonesDental EnamelTooth RemineralizationOsteoporosis, PostmenopausalBone DensityHardness TestsCariostatic AgentsDental Caries Activity TestsMicroradiographyReceptors, EstrogenFluorides, TopicalBone RemodelingEstrogen Receptor alphaRoot CariesDentinDental CariesDental Enamel SolubilityBone ResorptionTooth Erosion