2022
Effects of anode position on pedicle screw testing during lumbosacral spinal fusion surgery
Amick M, Ottesen TD, O'Marr J, Frenkel MY, Callahan B, Grauer JN. Effects of anode position on pedicle screw testing during lumbosacral spinal fusion surgery. The Spine Journal 2022, 22: 2000-2005. PMID: 35843532, DOI: 10.1016/j.spinee.2022.07.090.Peer-Reviewed Original ResearchConceptsPedicle screwsLumbosacral fusionPedicle screw stimulationProspective cohort studySpinal fusion surgeryLumbosacral pedicle screwsSafe screw placementCohort studyFusion surgeryOutcome measuresBACKGROUND DATAScrew stimulationClinical practiceClinical thresholdGluteal musclesScrew placementSurgical fieldSafe placementPatientsScrewsStimulationSuch implantsCurrent studyPlacementFormal evaluation
2021
The posterior superior iliac rim screw as an adjunct to pelvic fixation in complex spinopelvic stabilization
Joo PY, Grauer JN. The posterior superior iliac rim screw as an adjunct to pelvic fixation in complex spinopelvic stabilization. North American Spine Society Journal (NASSJ) 2021, 8: 100094. PMID: 35141658, PMCID: PMC8820036, DOI: 10.1016/j.xnsj.2021.100094.Peer-Reviewed Case Reports and Technical NotesPelvic fixationSpinopelvic reconstructionBilateral sacral fracturesPost-operative complicationsS2-alar-iliac screwsKey surgical techniquesAlar-iliac screwsPosterior superior iliac spineSuperior iliac spineMetastatic sarcomaRetrospective reviewCase seriesPelvic fracturesMedical recordsSacral fracturesSurgical techniqueRadiographic dataSacral fixationStable fixationIliac spineSpinopelvic stabilizationAdjunct methodLumbosacral reconstructionPatientsScrews
2012
Biomechanical comparison of endplate forces generated by uniaxial screws and monoaxial pedicle screws.
Essig DA, Miller CP, Xiao M, Ivancic P, Jegede K, Badrinath R, Smith BG, Grauer JN. Biomechanical comparison of endplate forces generated by uniaxial screws and monoaxial pedicle screws. Orthopedics 2012, 35: e1528-32. PMID: 23027492, DOI: 10.3928/01477447-20120919-24.Peer-Reviewed Original ResearchConceptsScrew-bone interfaceLoad cellBiomechanical ComparisonLess dense boneRotational controlMonoaxial pedicle screwsMonoaxial screwsScrew failureForce slopeReduced forceForceInterfaceAngleRodsScrewsImproved correctionDense boneBetter rotational controlPedicle screwsInferior vertebral endplateLoadPlasticPolyaxial screws