Spinal StenosisInjections, EpiduralEpendymaSpinal CanalSpinal CordSyringomyeliaHaversian SystemLidocaineAnesthetics, LocalSpinal Cord InjuriesLumbar VertebraeDecompression, SurgicalLaminectomySpondylolisthesisCarotid StenosisSemicircular CanalsAortic Valve StenosisRadiculopathyLigamentum FlavumSpinal FusionEar CanalLumbosacral RegionCoronary StenosisIntervertebral Disc DisplacementSpinal DiseasesSciaticaTracheal StenosisSpinal Nerve RootsSpinal Cord CompressionMyelographyPolyradiculopathyRoot Canal PreparationImmunohistochemistryLow Back PainSpondylosisIntermittent ClaudicationTreatment OutcomePyloric StenosisPain MeasurementMitral Valve StenosisDisability EvaluationConstriction, PathologicCervical VertebraePulmonary Valve StenosisBack PainInjections, SpinalMagnetic Resonance ImagingSteroidsOrthopedic ProceduresSacrumNeurosurgical ProceduresFailed Back Surgery SyndromeEpidural SpaceCauda EquinaRoot Canal IrrigantsProstheses and ImplantsDental Pulp CavitySpine