VertebroplastyFractures, CompressionPolymethyl MethacrylateSpinal FracturesBone CementsRetrospective StudiesKyphoplastyFractures, SpontaneousThoracic VertebraeSpineExtravasation of Diagnostic and Therapeutic MaterialsOsteoporotic FracturesSpinal NeoplasmsOsteoporosisBack PainLumbar VertebraeFluoroscopySurgical Procedures, Minimally InvasiveMethylmethacrylateRadiology, InterventionalOrthopedic ProceduresPain MeasurementTreatment OutcomeKyphosisRadiography, InterventionalInjections, SpinalSpinal CanalSpinal DiseasesAxisCementoplastyInjectionsPainPolymethacrylic AcidsSpinal Cord CompressionEmbolism, FatRadiographyPostoperative ComplicationsFollow-Up StudiesTomography, X-Ray ComputedPlacebo EffectPulmonary EmbolismForeign-Body MigrationFractures, ComminutedVirginiaSpinal InjuriesMethylmethacrylatesArthroplastyThermoluminescent DosimetryMagnetic Resonance ImagingHemangiomaLaminectomyMinnesotaCalcium PhosphatesFracture FixationReconstructive Surgical ProceduresSacrumThermal ConductivityAnesthesia, LocalPain ManagementSpinal FusionCohort StudiesDecompression, SurgicalNeedlesRisk Factors