Bone ScrewsTibiaFracture Fixation, InternalOsseointegrationBone DensityLeadBone and BonesFracture HealingX-Ray MicrotomographyBone RemodelingInternal FixatorsSpinal FusionBone ResorptionBone PlatesBone DevelopmentBone NeoplasmsBone MarrowBone TransplantationBone DiseasesBone Marrow CellsFractures, BoneBone NailsFemurFibulaBone RegenerationThoracic VertebraeBiomechanical PhenomenaFracture Fixation, IntramedullaryLumbar VertebraeBone MatrixOrthopedic ProceduresCadaverFluoroscopyAxisScoliosisBone SubstitutesWeight-BearingCervical VertebraeSurgery, Computer-AssistedSpinal DiseasesOrthopedic Fixation DevicesBone Diseases, MetabolicBone Marrow TransplantationBone CementsOsteogenesisDiaphysesFemoral FracturesPseudarthrosisSacrumSpineCervical AtlasBone WiresSpinal FracturesAtlanto-Axial JointOsteotomyTomography, X-Ray ComputedNeuronavigationTitaniumFracture FixationJoint Instability