Santoni, B G Cortical bone trajectory for lumbar pedicle screws. [electronic resource] - The spine journal : official journal of the North American Spine Society May 2009 - 366-73 p. digital Publication Type: Journal Article ISSN: 1878-1632 Standard No.: 10.1016/j.spinee.2008.07.008 doi Subjects--Topical Terms: Absorptiometry, PhotonBiomechanical PhenomenaBone ScrewsEquipment FailureHumansLumbar Vertebrae--surgeryMaterials TestingOsteoporosis--surgerySpinal Fusion--instrumentation