Spinal StenosisInjections, EpiduralEpendymaSpinal CordSpinal CanalChronic PainSyringomyeliaHaversian SystemLidocaineAnesthetics, LocalSpinal Cord InjuriesLumbar VertebraePainDecompression, SurgicalLaminectomyPain MeasurementPain ManagementSpondylolisthesisCarotid StenosisSemicircular CanalsAortic Valve StenosisLow Back PainRadiculopathyBack PainLigamentum FlavumSpinal FusionLumbosacral RegionEar CanalIntervertebral Disc DisplacementCoronary StenosisSciaticaSpinal DiseasesChronic DiseasePain, IntractablePain ThresholdSpinal Nerve RootsTracheal StenosisSpinal Cord CompressionTreatment OutcomeDisability EvaluationMyelographyPolyradiculopathyImmunohistochemistryInjections, SpinalRoot Canal PreparationSpondylosisIntermittent ClaudicationCervical VertebraePain, PostoperativePyloric StenosisConstriction, PathologicMagnetic Resonance ImagingMitral Valve StenosisPain PerceptionFailed Back Surgery SyndromePulmonary Valve StenosisAcute PainSteroidsNeuralgiaAnalgesicsSpinal NervesAnalgesics, OpioidOrthopedic ProceduresFollow-Up StudiesSacrumProspective StudiesNeck PainNeurosurgical ProceduresEpidural SpaceSeverity of Illness IndexCauda EquinaHyperalgesiaSpineRetrospective StudiesProstheses and ImplantsRoot Canal IrrigantsPain ClinicsAbdominal PainDental Pulp Cavity