SpondylolysisSpondylolisthesisLumbar VertebraeSpinal FusionSacrumZygapophyseal JointSpinal StenosisBone ScrewsLordosisDecompression, SurgicalAxisLaminectomyBack PainLow Back PainInternal FixatorsLumbosacral RegionSpineSpinal DiseasesFractures, StressTomography, X-Ray ComputedIntervertebral Disc DegenerationIntervertebral DiscIntervertebral Disc DisplacementOrthopedic Fixation DevicesSpinal CurvaturesSpinal CanalRadiculopathyJoint InstabilityIliumSpina Bifida OccultaScoliosisSpinal FracturesSynovial CystTreatment OutcomeMagnetic Resonance ImagingBone TransplantationKyphosisPelvisDisability EvaluationOsteoarthritis, SpineRetrospective StudiesPseudarthrosisCausalitySciaticaPostoperative ComplicationsOrthopedic Procedures