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
2005
Effects of Charité Artificial Disc on the Implanted and Adjacent Spinal Segments Mechanics Using a Hybrid Testing Protocol
Goel VK, Grauer JN, Patel TCh, Biyani A, Sairyo K, Vishnubhotla S, Matyas A, Cowgill I, Shaw M, Long R, Dick D, Panjabi MM, Serhan H. Effects of Charité Artificial Disc on the Implanted and Adjacent Spinal Segments Mechanics Using a Hybrid Testing Protocol. Spine 2005, 30: 2755-2764. PMID: 16371899, DOI: 10.1097/01.brs.0000195897.17277.67.Peer-Reviewed Original ResearchConceptsFinite element modelHybrid testing protocolFacet loadsElement modelPure momentsFinite element model validationLoad control modeLoad-controlled experimentsIntact caseArtificial disc designsL3-S1 segmentsIntradiscal pressure changesL3-L4 segmentLoad controlAxial compressionDisk designControl modeShear stressLoad sharingArtificial discSuch implantsFacet loadingCadaveric testingSegment mechanicsLoad