StephanusVan WykViljoenMD

PubMed

• Impact of obesity on adult spinal deformity (ASD) long-segment spinal fusion radiographic and clinical outcomes.
  Munjal, V., Matthew D Marquardt, David Gibbs, Andrew Grossbach, Alexander Keister, Vikas Munjal, Robert Moranville, Noah Mallory, Nathaniel Toop, Joravar Dhaliwal, Hen...> ;Clinical Neurology and Neurosurgery. 2024 Mar 1
• CT guided biopsy for osteodiscitis reduces cost of hospitalization in the landscape of increasing intravenous drug use: A single center retrospective analysis.
  Vignolles-Jeong, J., Vignolles-Jeong, J., Seth B Wilson, Jacob Ward, Joravar Dhaliwal, Katelyn Sette, Yamenah Ambreen, S Alexander Ammerman, Alexander Keister, Joshua ...> ;Clinical Neurology and Neurosurgery. 2024 Feb 1
• Predicting the Need for Surgery in Patients with Lumbar Disc Herniation: A New Internally Validated Scoring System.
  Rouzbeh Motiei-Langroudi, Homa Sadeghian, Uduak-Obong Ekanem, Aleeza Safdar, Andrew James Grossbach, Stephanus Viljoen> ;Asian Spine Journal. 2023 Dec 1
• Use of global sagittal flexibility to predict proximal junctional kyphosis after spinal deformity surgery.
  Ryan G Eaton, Joshua L Wang, Joravar Dhaliwal, Dominic Maggio, Alexander Keister, David Gibbs, Noah Mallory, Alexander Sparks, Robert Moranville, David S Xu, Andrew J ...> ;Journal of Neurosurgery. Spine. 2024 Jan 1
• 1 citations
  Treatment of Post-traumatic Syringomyelia With Placement of Syringopleural Shunt and Resection of Intrasyringeal Hematoma: 2-Dimensional Operative Video.
  Maxwell D Gruber, Matthieu Weber, Nathaniel Toop, David Xu, Stephanus Viljoen, Andrew Grossbach, Vikram Chakravarthy> ;Operative Neurosurgery. 2023 Dec 1
• The Effects of Nicotine- and Cigarette-Related Products on Osteogenesis, Bone Formation, and Bone Mineralization: A Systematic Review.
  Maxwell D Gruber, Joshua Vignolles-Jeong, Stephanus Viljoen, Andrew J Grossbach, David Xu, David Gibbs> ;Neurosurgery. 2023 Aug 1
• Early Postural Stability Changes in Patients Undergoing Correction of Spinal Deformity: A Prospective, Controlled Pilot Study.
  Alexander Keister, Andrew Grossbach, Nathaniel Toop, Noah Mallory, David Gibbs, David Xu, Stephanus Viljoen> ;Spine. 2023 Feb 15
• 3 citations
  Subsidence Rates Associated With Porous 3D-Printed Versus Solid Titanium Cages in Transforaminal Lumbar Interbody Fusion.
  Nathaniel Toop, Joravar Dhaliwal, Andrew Grossbach, David Gibbs, Nihaal Reddy, Alexander Keister, Noah Mallory, David Xu, Stephanus Viljoen> ;Global Spine Journal. 2023 Feb 14
• 2 citations
  Electronic versus paper patient-reported outcome measure compliance rates: A retrospective analysis.
  David Gibbs, Nathaniel Toop, Andrew J Grossbach, Alexander Keister, Noah Mallory, Benjamin Hatef, Joshua Weinberg, Stephanus Viljoen, David Xu> ;Clinical Neurology and Neurosurgery. 2023 Mar 1
• Letter: Arthrodesis With Titanium Implants: A Different Picture.
  Maxwell Gruber, Ryan Eaton, Stephanus Viljoen, Andrew Grossbach, David Xu, Munjal, V., Vikas Munjal> ;Neurosurgery. 2023 Apr 1
• Endoscopic endonasal resection of craniovertebral junction osteomyelitis: illustrative cases.
  Alexander Keister, Joshua Vignolles-Jeong, Daniel Kreatsoulas, Kyle VanKoevering, Stephanus Viljoen, Daniel Prevedello, Andrew J Grossbach> ;Journal of Neurosurgery. Case Lessons. 2023 Jan 2
• Delayed stenosis associated with sublaminar band placement in the thoracic spine for proximal junctional kyphosis.
  David Gibbs, Andrew James Grossbach, Noah Mallory, Nathaniel Toop, Stephanus Viljoen> ;Surgical Neurology International. 2023 Jan 1
• 2 citations
  Static Cage Morphology in Short-Segment Transforaminal Lumbar Interbody Fusions Is Associated With Alterations in Foraminal Height But Not Clinical Outcomes.
  Nathaniel Toop, Andrew Grossbach, David Gibbs, Asad Akhter, Alexander Keister, Dominic Maggio, James Oosten, Ty Gilkey, H Francis Farhadi, Stephanus Viljoen, Deistler, K.> ;World Neurosurgery. 2022 Mar 1
• 1 citations
  Spinal deformity correction in ankylosing spondylitis.
  Dominic Maggio, Andrew Grossbach, David Gibbs, Robert Moranville, Nathaniel Toop, David Xu, Stephanus Viljoen> ;Surgical Neurology International. 2022 Jan 1
• 5 citations
  Radiographic and clinical outcomes in one- and two-level transforaminal lumbar interbody fusions: a comparison of bullet versus banana cages.
  Nathaniel Toop, Stephanus Viljoen, Justin Baum, Jeffrey Hatef, Dominic Maggio, James Oosten, Ty Gilkey, Liesl Close, H Francis Farhadi, Andrew J Grossbach, Deistler, K.> ;Journal of Neurosurgery. Spine. 2022 Jun 1
• 3 citations
  Baseline parameters and the prediction of treatment failure in patients with intravenous drug use-associated spinal epidural abscesses.
  Justin Baum, Stephanus V. Viljoen, Connor S. Gifford, Amy J. Minnema, Ammar Shaikhouni, Andrew J. Grossbach, Shahid M Nimjee, H. Francis Farhadi> ;Journal of Neurosurgery. Spine. 2021 Nov 5
• 7 citations
  Efficacy of Intravenous Tranexamic Acid in Reducing Perioperative Blood Loss and Blood Product Transfusion Requirements in Patients Undergoing Multilevel Thoracic and ...
  Alexandre B. Todeschini, Alberto A. Uribe, Marco Echeverria-Villalobos, Juan Fiorda-Diaz, Mahmoud Abdel-Rasoul, Benjamin G McGahan, Andrew J. Grossbach, Stephanus V. V...> ;Frontiers in Pharmacology. 2020 Nov 30
• C1-2 facet disarticulation for correction of iatrogenic cervical kyphosis following occipital-cervical fusion.
  Miki Katzir, Aboubakr T Amer, Asad S Akhter, Stephanus V Viljoen, Ehud Mendel> ;Neurosurgical Focus. 2020 Jul 1
• 15 citations
  A comprehensive finite element model of surgical treatment for cervical myelopathy
  Kirsten Stoner, Kingsley Abode-Iyamah, Douglas C. Fredericks, Stephanus V. Viljoen, Matthew A. Howard, Nicole M. Grosland> ;Clinical Biomechanics. 2020 Apr 1
• 3 citations
  Unilateral atlantoaxial pseudoarticulation: A case report, literature review, and proposed mechanism.
  Ryan G. Eaton, Stephanus V. Viljoen> ;Surgical Neurology International. 2020 Feb 7
• 7 citations
  Impact of the Inclusion of C2 in Posterior Cervical Fusions for Cervical Myelopathy on Sagittal Cervical Alignment.
  Royce W. Woodroffe, Logan Helland, Chanse Hollatz, Anthony Piscopo, Liesl N. Close, Kirill V. Nourski, Stephanus V. Viljoen, Andrew J. Grossbach, Patrick W. Hitchon> ;Clinical Spine Surgery. 2020 May 1
• 6 citations
  Sublaminar banding as an adjunct to pedicle screw-rod constructs: a review and technical note on novel hybrid constructs in spinal deformity surgery.
  Vibhu Krishnan Viswanathan, Amy J. Minnema, Stephanus V. Viljoen, H. Francis Farhadi> ;Journal of Neurosurgery. Spine. 2019 Mar 1
• 3 citations
  Sublaminar polyester bands as a salvage fixation method in the cervical spine: novel application in two patients.
  Luke G F Smith, Nguyen Hoang, Ammar Shaikhouni, Stephanus V. Viljoen> ;Journal of Neurosurgery. Spine. 2019 Mar 1
• 15 citations
  Biomechanical assessment of proximal junctional semi-rigid fixation in long-segment thoracolumbar constructs.
  Ranjit Ganguly, Amy J. Minnema, Nicole A. DeVries Watson, Nicole M. Grosland, Douglas C. Fredericks, Andrew J. Grossbach, Stephanus V. Viljoen, H. Francis Farhadi> ;Journal of Neurosurgery. Spine. 2019 Feb 1
• 19 citations
  An ovine model of spinal cord injury
  Kingsley Abode-Iyamah, John Miller, Chandan G. Reddy, Sina Safayi, Douglas C. Fredericks, Nick D. Jeffery, Nicole A DeVries-Watson, Sara K. Shivapour, Stephanus V. Vil...> ;The Journal of Spinal Cord Medicine. 2017 May 4
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Journal Articles

• The Application of the Revised Condyle-C1 Interval Method to Diagnose Traumatic Atlanto-occipital Dissociation in Adults  
  Dahdaleh NS, Khanna R, Menezes AH, Smith ZA, Viljoen SV, Koski TR, Hitchon PW, Dlouhy BJ., Global Spine J., 1/1/2016
• An Ovine Model of Spinal Cord Injury  
  Wilson S, Abode-Iyamah KO, Miller JW, Reddy CG, Safayi S, Fredericks DC, Jeffery ND, DeVries-Watson NA, Shivapour SK, Viljoen S, Dalm BD, Gibson-Corley KN, Johnson MD,..., J Spinal Cord Med, 1/1/2016
• Vertebroplasty plus short segment pedicle screw fixation in a burst fracture model in cadaveric spines  
  Grossbach AJ, Viljoen SV, Hitchon PW, DeVries Watson NA, Grosland NM, Torner J., J Clin Neurosci., 1/1/2015
• MR-Based Measurement of Spinal Cord Motion During Flexion of the Spine: Implications for Intradural Spinal Cord Stimulator Systems  
  Viljoen S, Smittkamp C, Dalm B, Wilson S, Reddy C, Gillies G, Howard M., J Med Eng Technol., 1/1/2014
• Effect of steerable cage placement during minimally invasive transforaminal lumbar interbody fusion on lumbar lordosis  
  Lindley TE, Viljoen SV, Dahdaleh NS, J Clin Neurosci, 1/1/2014
• Predictors of outcome in the non-operative management of thoracolumbar and lumbar burst fractures  
  Hitchon PW, He W, Viljoen S, Dahdaleh NS, Kumar R, Noeller J, Torner J., Br J Neurosurg., 1/1/2014
• Graft inserter for anterior cervical fusion  
  Hitchon PW, Kumar R, Viljoen S, Dahdaleh NS, J Clin Neurosci, 1/1/2014
• Biomechanical analysis of anterior versus posterior instrumentation following a thoracolumbar corpectomy: Laboratory investigation  
  Viljoen SV, DeVries Watson NA, Grosland NM, Torner J, Dalm B, Hitchon PW, J Neurosurg Spine, 1/1/2014
• A Novel Dural Reconstruction Method Following Spinal Tumor Resection  
  Dalm BD, Viljoen S, Gillies GT, Oya H, Howard MA III, Neurosurgery Quarterly, 1/1/2014
• Intracranial Hemorrhage with Dabigatran  
  Wassef SN, Abel TJ, Grossbach A, Viljoen SV, Jackson AW, Howard MA 3rd, Greenlee J, Neurosurgery, 1/1/2013
• Risk of hemorrhagic complication associated with ventriculoperitoneal shunt placement in aneurysmal subarachnoid hemorrhage patients on dual antiplatelet therapy  
  Mahaney KB, Chalouhi N, Viljoen S, Smietana J, Kung DK, Jabbour P, Bulsara KR, Howard MA 3rd, Hasan DM, Journal of Neurosurgery, 1/1/2013
• Posterior ligamentous complex healing following disruption in thoracolumbar fractures  
  Dahdaleh NS, Viljoen, SV, Dalm BD, Grosland NM, Howard MA 3rd, Medical Hypotheses, 1/1/2013
• Alternative grafts in anterior cervical fusion  
  Chen F, He W, Mahaney K, Noeller J, Mhanna N, Viljoen S, Torner J, Hitchon P., Clin Neurol Neurosurg, 1/1/2013
• Apparatus for simulating dynamic interactions between the spinal cord and soft-coupled intradural implants  
  Viljoen S, Oya H, Reddy CG, Dalm BD, Shurig R, Odden K, Gillies GT, Howard MA 3rd., Rev Sci Instrum., 1/1/2013
• Soft-coupling suspension system for an intradural spinal cord stimulator: Biophysical performance characteristics  
  Oya H, Safayi S, Jeffery ND, Viljoen S, Reddy CG, Dalm BD, Kanwal JK, Gillies GT, Howard MA., Journal of Applied Physics, 1/1/2013
• Optimization of intradural spinal cord stimulator designs via analysis of thoracic spine imaging data  
  Viljoen S, Dalm BD, Reddy CG, Wilson S, Smittkamp C, Gillies GT, Howard III MA, Journal of Medical and Biological Engineering, 1/1/2013
• Vagus Nerve Stimulation After Revision  
  Dlouhy BJ, Viljoen SV, Kung DK, Vogel TW, Granner MA, Howard MA 3rd, Kawasaki H., Neurosurg Focus, 1/1/2012
• Clinical and radiographic predictors of neurological outcome following posterior fossa decompression for spontaneous cerebellar hemorrhage  
  Dahdaleh NS, Dlouhy, BJ, Viljoen SV, Capuano AW, Kung DK, Torner JC. Hasan DM, Howard MA 3rd, Journal of Clinical Neuroscience, 1/1/2012
• Biophysical attributes of an in vitro spinal cord surrogate for use in developing an intradural neuromodulation system  
  Howard III MA, Utz M, Brennan TJ, Dalm BD, Viljoen S, Kanwal JK, Gillies GT., Journal of Applied Physics, 1/1/2011
• Intradural approach to selective stimulation in the spinal cord for treatment of intractable pain: Design principles and wireless protocol  
  Howard III MA, Utz M, Brennan TJ, Dalm BD, Viljoen S, Jeffery ND, Gillies GT., Journal of Applied Physics, 1/1/2011
• A Macroscopic Kinetic Model For DNA Polymerase Elongation and High Fidelity Nucleotide Selection  
  Viljoen S, Griep MA, Nelson M, Viljoen H, Computational Biology and Chemistry, 1/1/2005
• Cordectomy for intramedullary spinal cord glioblastoma with a 12-year survival  
  Viljoen S, Hitchon PW, Ahmed R, Kirby PA., Surg Neurol Int., 1/25/2014
• Effect of Surgery on Gait and Sensory Motor Performance in Patients With Cervical Spondylotic Myelopathy  
  Abode-Iyamah KO, Viljoen SV, McHenry CL, Petrie MA, Stoner KL, Dahdaleh NS, Grosland NM, Howard MA, Shields RK., Neurosurgery, 1/1./2016
• Successful Treatment of a Three-Column Thoracic Extension Injury with Recumbency  
  Choy W, Smith ZA, Viljoen SV, Lindley TE, Dahdaleh NS, Cureus, 1/18/2016
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Books/Book Chapters

• Surgical Anatomy and Techniques to the Spine 
  Chapter: Surgical Stabilization techniques for Thoracolumbar Fractures 
  Dahdaleh NS, Patrick A, Hitchon PW, Viljoen SEditors: Kim DH, Vaccaro A, Dickman C, Cho D, Lee S, Kim MD I.Saunders, Philadelphia2013