Jonathan N. Grauer

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BACKGROUND CONTEXT The past three decades have witnessed increasing interest in strategies to improve neurologic function after spinal cord injury. As progress is made in our understanding of the pathophysiologic events that occur after acute spinal cord injury, neuroprotective agents are being developed. PURPOSE Clinicians who treat acute spinal cord(More)
STUDY DESIGN Finite element model of L3-S1 segment and confirmatory cadaveric testing were used to investigate the biomechanical effects of a mobile core type artificial disc (Charité artificial disc; DePuy Spine, Raynham, MA) on the lumbar spine. OBJECTIVE To determine the effects of the Charité artificial disc across the implanted and adjacent segments.(More)
Clinical symptoms of whiplash are presently not well understood. Injuries to capsular and other spinal ligaments of the cervical spine during trauma are a possible pathomechanism that could explain some aspects of the whiplash symptom complex. This study quantified the elongations of capsular ligaments (CLs) at all cervical spinal levels during whiplash(More)
STUDY DESIGN A bench-top trauma sled was used to apply four intensities of whiplash trauma to human cadaveric cervical spine specimens and to measure resulting intervertebral rotations using high-speed cinematography. OBJECTIVES To determine the cervical spine levels most prone to injury from whiplash trauma and to hypothesize a mechanism for such injury.(More)
BACKGROUND Computerized tomographic scans are routinely obtained to evaluate a number of musculoskeletal conditions. However, since computerized tomographic scans expose patients to the greatest amounts of radiation of all imaging modalities, the physician must be cognizant of the effective doses of radiation that are administered. This investigation was(More)
BACKGROUND CONTEXT Biomechanical studies of artificial discs that quantify parameters such as load sharing and stresses have been reported in literature for single-level disc placements. However, literature on the effects of using the Charité artificial disc (ChD) at two levels (2LChD) as compared with one-level fusion (using a cage [CG] and a pedicle screw(More)
OBJECTIVES To identify factors associated with increased postoperative length of stay (LOS) and readmission after surgical repair of geriatric hip fractures. METHODS Patients aged 70 years and older who underwent hip fracture surgery from January 2011 through December 2012 were identified in the American College of Surgeons National Surgical Quality(More)
Introduced in 1911, spinal fusion is now widely used to stabilize the cervical, thoracic, and lumbar spine. Despite advancements in surgical techniques, including the use of instrumentation and optimizing bone graft options, pseudarthrosis remains one of the most significant causes of clinical failure following attempted fusion. Diagnosis of this common(More)
STUDY DESIGN Retrospective Survey Analysis. OBJECTIVE To explore surgeon preference in the choice of surgical approach in the treatment of traumatic cervical facet dislocations. SUMMARY OF BACKGROUND DATA The choice of surgical approach in the treatment of traumatic cervical dislocations is highly variable and maybe influenced by a variety of factors.(More)