AlendronateBone Density Conservation AgentsOsteoporosis, PostmenopausalEtidronic AcidDiphosphonatesBone DensityOsteoporosisBone RemodelingFractures, BoneTeriparatideFemoral FracturesBone ResorptionFemurSpinal FracturesBone and BonesRaloxifeneHydroxycholecalciferolsFractures, SpontaneousCollagen Type ITibiaDrugs, GenericBone Diseases, MetabolicSpineBone Demineralization TechniqueLumbar VertebraeGeranyltranstransferaseClodronic Acid