AmputationBone and BonesAmputation, TraumaticAmputation StumpsBone RemodelingArtificial LimbsBone DensityDiabetic FootLower ExtremityAmputeesBone ResorptionBone NeoplasmsLegBone MarrowPhantom LimbLimb SalvageBone DevelopmentBone Marrow CellsGangreneBone DiseasesIschemiaDisarticulationBone RegenerationFinger InjuriesBone TransplantationLeg InjuriesBone MatrixBone Marrow TransplantationToesTibiaExtremitiesFoot UlcerPeripheral Vascular DiseasesFractures, BoneReplantationVascular Surgical ProceduresBone SubstitutesBone Diseases, MetabolicPodiatryFootRegenerationFemurRetrospective StudiesBone Morphogenetic ProteinsTreatment OutcomeWound HealingArterial Occlusive DiseasesDebridementReoperationBone Morphogenetic Protein 2Popliteal ArteryOsteogenesisTemporal BoneOsteomyelitisTime FactorsBlast InjuriesAnimal FinsForefoot, HumanTibial ArteriesParietal BoneMetatarsal BonesForelimbArm InjuriesFemoral ArteryFibulaKneeFollow-Up StudiesFoot DiseasesOsteosarcomaOsteoblastsPeripheral Arterial DiseaseAlveolar Bone LossBone CementsFoot BonesVascular PatencyLeg UlcerHemipelvectomyBone CystsBlood Gas Monitoring, TranscutaneousOsteoclastsOsteoporosisThromboangiitis ObliteransReconstructive Surgical ProceduresProsthesis FittingTibial FracturesHumerusPostoperative ComplicationsSurgical FlapsTailMetatarsusHand InjuriesTarsal BonesSalamandridaeDiabetes ComplicationsFrontal BoneArthropathy, NeurogenicHospitals, VeteransFoot InjuriesArteriosclerosis ObliteransCalcification, Physiologic