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Abstracts of the 2012 Meeting of the Lumbar Spine Research Society April 26–27, 2012

Poster 1. Transdiscal Fixation for High Grade Spondylolisthesis
Brett A. Braly, MD, Nicholas Spina, MD, W. T. Ward, and Joon Y. Lee, MD
Poster 2. Comparison of clinical outcomes following Interspinous Process Distractor (X-STOPTM) Implantation or Interlaminar Lumbar Instrumented Fusion (ILIFTM) for lumbar spinal stenosis
Charles Milchteim, MD, Joseph R. O'Brien, MD, MPH, Michael T. Benke, MD, Matthew R. Livingood, and Warren D. Yu, MD
Poster 3. Use Of Recombinant Human Bone Morphogenetic Protein-2 (rhBMP-2) Without Iliac Crest Bone Graft In Posterolateral Lumbar Spine Fusion (PLF)
Daniel K. Park, MD, Sung Soo Kim, and Scott Boden, MD
Poster 4. Evaluation of Self Reported Functional Limitations Due to Lumbar Stiffness in Adult Spinal Deformity Patients
Robert A. Hart, MD, Alan H. Daniels, MD, Praveen V. Mummaneni, MD, Richard A. Hostin, MD, Christopher I. Shaffrey, MD, Justin S. Smith, MD, PhD, Bret Line, Virginie Lafage, PhD, and Shay Bess, MD
Poster 5. Functional Limitations Due to Lumbar Stiffness Correlate with Age and SRS-22 Scores in Asymptomatic Volunteers
Robert A. Hart, MD, Alan H. Daniels, MD, Praveen V. Mummaneni, MD, Bret Line, Virginie Lafage, PhD, Behrooz A. Akbarnia, MD, Gregory M. Mundis, MD, and Shay Bess, MD
Poster 6. Comparison Of Cortical Trajectory And Traditional Pedicle Screw Loosening In Lumbar Spine With Cyclic Loading
Erkan Alci, MD, and Jonathan Gottlieb, MD
Poster 7. Analysis of the Techniques for Thoracic and Lumbar Level Localization During Posterior Spine Surgery and the Occurrence of Wrong Level Surgery: Results from a National Survey
Jillian E. Mayer, BA, Rajan P. Dang, BA, Guillermo D. Prieto, MD, Samuel K. Cho, MD, Sheeraz A. Qureshi, MD, MBA, and Andrew C. Hecht, MD
Poster 8. Institutional Screening for Methicillin-Resistant Staphylococcus aureus in Patients Undergoing Spine Surgery
Leo Spector, MD, Lisa Kelly, MSN, Julie Jerman, BBA, Ruth Hallmark, BSN, RN, ONC, CIC, Susan Odum, Med, Rebecca Lark, MD, and Bruce Darden, MD
Poster 9. Patient Impressions of Reimbursement for Orthopedic Spine Surgeons
K. Linnea Welton, MD, Mufaddal M. Gomberawalla, MD, Jeffrey S. Fischgrund, MD, Gregory P. Graziano, MD, and Rakesh D. Patel, MD
Poster 10. Rates and Causes of Mortality Associated with Spine Surgery Based on 108, 419 Procedures: A Review of the Scoliosis Research Society Morbidity and Mortality Database
Justin S. Smith, MD, PhD, Dwight Saulle, MD, Ching-Jen Chen, BA, Lawrence G. Lenke, MD, David W. Polly Jr, MD, Manish K. Kasliwal, MD, Paul A. Broadstone, MD, Steven D. Glassman, MD, Alexander R. Vaccaro, MD, PhD, Christopher P. Ames, MD, and Christopher I. Shaffrey, MD
Poster 11. Long-term Clinical and Functional Outcomes After Laminectomy and Fusion for Degenerative Disease vs. Spondylolisthesis
Dennis Crandall, Jan Revella, RN, Kurt Crandall, and Ryan McLeMore, PhD
Poster 12. Long-term Narcotic Usage Following Spinal Surgery
Daniel Gaffney, MD, Michael D. Daubs, Brandon D. Lawrence, MD, Darrel S. Brodke, MD, Alpesh A. Patel, MD, and Thomas Higgins, MD
Poster 13. Facet Joint Violation in Pedicle Screw Placement with Intraoperative 3-Dimensional CT (O-arm) Image-Guidance
Sharon C. Yson, MD, Jonathan N. Sembrano, MD, Peter C. Sanders, MD, Edward Rainier G. Santos, MD, and David W. Polly Jr., MD
Poster 14. Arthrodesis and Pseudarthrosis Rates in 78 Studies Utilizing a Rabbit Posterolateral Spine Arthrodesis Model with Iliac Crest Autograft
Jason H. Ghodasra, B.S., Erika L. Daley, B.A., Erin L. Hsu, Ph.D., and Wellington K. Hsu, M.D.
Poster 15. The Impact Of Reduction Of Pain Following Lumbar Spine Surgery: The Relationship Between Changes In Pain And Changes In Function And Disability
Richard L. Skolasky, ScD, Stephen T. Wegener, PhD, Anica M. Maggard, BS, and Lee H. Riley III, MD
Poster 16. Lumbar Spinous Process Splitting Laminoplasty: A Novel Technique for Minimally Invasive Lumbar Decompression. Report on 27 Patients
Ahmad Nassr, M.D., Charbel D. Moussallem, M.D., FEBOT, Bradford Currier, M.D., Michael Yaszemski, M.D., PhD, Paul Huddleston, M.D., Peter Rose, M.D., and Mark Dekutoski, M.D.
Poster 17. Improvement Of Sagittal Balance And Lumbar Lordosis Following Less Invasive Adult Spinal Deformity Surgery With Expandable Cages And Percutaneous Instrumentation
Michael Y. Wang
Poster 18. Long-Term Clinical, Functional, and Occupational Outcomes Following TLIF with rhBMP: Smokers vs. Nonsmokers
Dennis Crandall, MD, Matthew Wilson, Jan Revella, RN, Dustin Revella, BA, and Ryan McLemore, PhD
Poster 19. Primary vs. Revision Fusion: How Well Do Patients Walk Long-term?
Dennis Crandall, Melissa Gebhardt, PA-C, Jan Revella, RN, Dustin Revella, BA, and Ryan McLemore, PhD
Poster 20. Fixed vs. Expandable Cage In TLIF: A Radiographic Comparison
Dennis Crandall, Sigurd Berven, MD, Neel Anand, MD, Murali Kadaba, PhD, Eric Huish, BS, and Ryan McLemore, PhD
Poster 21. Meta-Analysis of Vertebroplasty Compared to Conservative Treatment
William L. Tontz, MD, Paul A. Anderson, MD, and Alex Froysteter, BA
Poster 22. Incidence And Morbidity Of Concomitant Spine Fractures In Combat Related Amputees
Adam Bevevino, MD, Ronald A. Lehman, MD, Daniel G. Kang, MD, Scott M. Tintle, MD, Theodora Dworak, BS, and Benjamin K. Potter, MD
Poster 23. The Biomechanical Consequences Of Rod Reduction Following Facetectomy In The Lumbar Spine
Adam Bevevino, MD, Ronald A. Lehman, MD, Daniel G. Kang, MD, Melvin D. Helgeson, MD, Rachel Gaume, BS, Paul Happel, BS, and Anton E. Dmitriev, PhD
Poster 24. Do Ponte Osteotomies Affect The Biomechanical Consequences Of Rod Reduction In The Thoracic Spine?
Daniel G. Kang, Adam J. Bevevino, MD, Ronald A. Lehman, MD, Rachel E. Gaume, BS, Melvin D. Helgeson, MD, and Anton E. Dmitriev, PhD
Poster 25. The Ventral Lamina and Superior Facet Rule: A Morphometric Analysis for Ideal Thoracic Pedicle Screw Start Point
Ronald A. Lehman, MD, Daniel G. Kang, Lawrence G. Lenke, MD, Rachel Gaume, BS, and Haines Paik, MD
Poster 26. Biologic Augmentation of the Intervertebral Disc with a Growth Factor-Loaded Chitosan Hydrogel Administered Percutaneously: A Rabbit Nucleotomy Model
Casey Bachison, M.D., Tristan Maerz, M.S., Kevin Baker, Ph.D., Harry Herkowitz, M.D., and Jeffrey Fischgrund, M.D.
Poster 27. In Vivo Delivery of E. Coli-Expressed rhBMP-2 by Biomimetic Calcium Phosphate Coatings in the Setting of Lumbar Spine Fusion: Effect of Incoporated Dose
Siddharth Badve, M.D., Casey Bachison, M.D., Kevin Baker, Ph.D., Jeffrey Fischgrund, M.D., and Harry Herkowitz, M.D.
Poster 28. Hidden Blood Loss During Posterior Spinal Fusion
Yossi Smorgick, MD, Harry Herkowitz, MD, Kevin Baker, David Montgomery, and Jeffrey S. Fischgrund, MD
Poster 29. 24 Month Functional Outcomes From The US IDE Trial Evaluating The Stabilimax®, A Lumbar Posterior Dynamic Stabilization (PDS) System With Interpedicular Travel (IPT)
Neel Anand, MD, Antonio Castellvi, MD, Ken Yonemura, MD, Scott Kitchel, MD, Boyle Cheng, PhD, and Bruce Robie, PhD
Poster 30. The Impact Of Pain Reduction Following Lumbar Spine Surgery: The Relationship Between Pain And Depression
Richard L. Skolasky, Lee H. Riley III, MD, Anica M. Maggard, BS, and Stephen T. Wegener, PhD
Poster 31. Vascular Injury and Exposure in Anterior Lumbar Interbody Fusions
Daniel Lubelski, Vladimir Zahradnik, MD, Kalil G. Abdullah, Vikram Kashyap, MD, and Thomas E. Mroz, MD
Poster 32. A comparison of Open versus MIS TLIFs in a Worker's Compensation Patient Population
Kern Singh, M.D., Miguel Pelton, B.S., and Frank M. Phillips, M.D.
Poster 33. A Peri-operative Cost And Charge Analysis Following Single Level Minimally Invasive Versus Open Transforaminal Lumbar Interbody
Miguel Pelton, B.S., Kern Singh, M.D., and Frank M. Phillips, M.D.
Poster 34. Return To Golf After Spine Surgery
Dennis Crandall, MD, David Swanson, MD, Jan Revella, RN, Jason Datta, MD, Michael Chang, MD, Terrence Crowder, MD, and Ryan McLemore, PhD
Poster 35. The Effect Of Low Dose Bone Morphogenic Protein (rhbmp-2) On Posterolateral Fusion In Adult Spinal Deformity Surgery
Justin B. Hohl, MD, Michael D. Daubs, MD, Jayme R. Hiratzka, MD, Prokopis Annis, MD, Brandon D. Lawrence, MD, and Darrel S. Brodke, MD
Poster 36. A Retrospective Study of the Multiply Operated Back due to Lumbar Spinal Stenosis
Norifumi Suga
Poster 37. Biomechanical Assessment of Anterior Thoracolumbar Fixation: A Comparison of the Significance of Cross Connectors in a Calf Model
Martin Gehrchen, M.D, Ph.D., Sajan K. Hegde, M.D., Mark Moldavsky, Suresh Chinthukunta, M.S., Manasa Gudipally, M.S., Brandon Bucklen, Ph.D., and Saif Khalil, Ph.D.
Poster 38. The Accuracy of Intraoperative 3D image guided Percutaneous Pedicle Screw Insertion
Edward Rainier G. Santos, MD, Jonathan N. Sembrano, MD, Charles Gerald T. Ledonio, MD, Sharon C. Yson, MD, A. Noelle Larson, MD, and David W. Polly Jr., MD
Poster 39. A Prospective Evaluation of Minimally Disruptive Lateral Interbody Fusion in the Treatment of Degenerative Spondylolisthesis: Mid-term Clinical and Radiographic Outcomes
Kaveh Khajavi, Alessandria Y. Shen, BA, and Anthony L. Hutchison, MSN
Poster 40. Anterior Lumbar Interbody Fusion: The Use Of Ct In The Postoperative Patient And Guidelines On The Appropriate Time For Follow Up Imaging
Sima Banerjee, MD, Tharwat El-zahran, MD, John G. Heller, MD, Claude Pierre-Jerome, MD, Walt Carpenter, MD, Scott Boden, MD, Jian Kang, Michael R. Terk, MD, Ali Zahrai, Joe W. Chiles, and Daniel Refai
Poster 41. Can Annular Reconstruction Reduce the Incidence of and Re-operations for Recurrent Herniated Nucleus Pulposus?
Jeffrey D. Coe, and Jianghui Zhang, MD
Paper 1. Minimally Invasive versus Open Transforaminal Lumbar Interbody Fusion (TLIF) for Degenerative Spondylolisthesis: Comparative Effectiveness and Cost-utility Analysis
Scott L. Parker, M.D., Stephen K. Mendenhall, B.S., David N. Shau, B.S., Scott L. Zuckerman, B.S., and Matthew J. McGirt, M.D.
Paper 2. Single Versus Multilevel Fusion, For Single Level Degenerative Spondylolisthesis And Multilevel Lumbar Stenosis. Four-Year Results of the Spine Patient Outcomes Research Trial
Yossi Smorgick, MD, Jeffrey S. Fischgrund, MD, Daniel Park, MD, Kevin Baker, PhD, Jon D. Lurie, MD, MS, Wenyan Zhao, PhD, Harry Herkowitz, MD, and James N. Weinstein, DO, MS
Paper 3. Long-Term Re-operation Rates With Surgical Treatment of Lumbar Spondylolisthesis
Abdul Baker, MD, Beatrice Ugiliweneza, PhD, MSPH, Chirag Patil, MD, MS, Shivanand Lad, MD, PhD, Lad, MD, PhD, and Maxwell Boakye, MD, MPH
Paper 4. Complications Following Use Of RhBMP-2 In Anterior Lumbar Interbody Fusion
Daniel Lubelski, Kalil G. Abdullah, Amy S. Nowacki, PhD, Matthew D. Alvin, Michael P. Steinmetz, MD, Edward C. Benzel, MD, and Thomas E. Mroz, MD
Paper 5. Retrograde Ejaculation Following Single-Level Anterior Lumbar Surgery with or without rhBMP-2 in Five Randomized Controlled Trials
J. Kenneth Burkus, MD, Randall F. Dryer, MD, and John H. Peloza, MD
Paper 6. Anterior Lumbar Interbody Fusion With Recombinant Human Bone Morphogenetic Protein-2 And Retrograde Ejaculation: Results From A Non-industry Sponsored, Single Surgical Team
Alexander Ghanayem, MD, and John Santaniello, MD
Paper 7. Recurrent Stenosis Following Transforaminal Interbody Fusion (TLIF) Using Bioresorbable Cages and Bone Morphogenic Protein
Jeffrey D. Coe, MD, Michael W. Cluck, MD, PhD, and Jianghui Zhang, MD
Paper 8. The Presence and Distribution of Leg Pain After Spine Surgery: Laminectomy vs. TLIF with BMP
Dennis Crandall, MD, Jan Revella, RN, Dustin Revella, BA, and Ryan McLemore, PhD
Paper 9. Cost-utility And Comparative Effectiveness Analyses Of Transforaminal Lumbar Interbody Fusion (tlif) Versus Comprehensive Medical Management For Lumbar Spondylolisthesis
Scott L. Parker, M.D., Scott Zuckerman, B.S., David N. Shau, B.S., Stephen K. Mendenhall, B.S., and Matthew J. McGirt, M.D.
Paper 10. Translational Correction of High Grade Spondy lolisthesis: What Distal Anchorage is Best?
Dennis Crandall, MD, Kenneth Schmidt, MD, and Jan Revella, RN
Paper 11. Relationship Of The Lumbar Lordosis Angle To The Abdominal Aortic Bifurcation And Inferior Vena Cava Confluence Levels
Charbel D. Moussallem, M.D., FEBOT, Ibrahim Abou Hamad, PhD, Christine EL-Yahchouchi, M.D., Maroun D. Moussallem, PhD, Damien Arnalsteen, M.D, Patrice Mertl, M.D., PhD, and Heric Havet, M.D., PhD
Paper 12. Change in Functional Activity One Year Following Lumbar Decompression with or without Fusion
Rosanna L. Wustrack, MD, Guillermo Ramirez, BS, and Shane Burch, MD
Paper 13. Pitfalls of Calculating Hospital Readmission Rates Based Solely on Nonvalidated Administrative Datasets
Beejal Amin, MD, Urvij Modhia, Steven Takemoto, PhD, Dean Chou, MD, Vedat Deviren, Christopher Ames, Sigurd Berven, MD, and Praveen Mummaneni
Paper 14. Cost effective Analysis Utilizing a Markov Model: Total Hip Arthroplasty and Total Knee Arthroplasty for Osteoarthritis vs. Posterior Spinal Fusion for Degenerative Lumbar Spondylolisthesis
Brian Cunningham, MD, Dennis Crandall, MD, and Ryan McLemore, PhD
Paper 15. Intradiscal Injection Of Simvastatin Results In Radiologic, Histologic, And Genetic Evidence Of Disc Regeneration In A Rat Model Of Degenerative Disc Disease
Khoi D. Than, Shayan U. Rahman, M.D., Lin Wang, M.D., Kwaku A. Kyere, B.A., Tracey T. Than, Adam Khan, B.A., Frank La Marca, M.D., Paul Park, M.D., Huina Zhang, M.D., Ph.D., and Chia-Ying Lin, Ph.D.
Paper 16. Notochordal Cells Protect Nucleus Pulposus Cells From Degradation And Apoptosis: Implications For The Mechanisms Of Intervertebral Disc Degeneration
William M. Erwin, DC, PhD, Diana Islam, MSc, Robert D. Inman, MD, FRCP (C), Michael G. Fehlings, MD, PhD, FRCS (C), and Florence WL Tsui, PhD
Paper 17. The Variability Of Commercially Available Scaffolds In Promoting Osteogenesis In Vitro
Jason Ghodasra, Michael Nickoli, MD, Samuel I. Stupp, PhD, Wellington K. Hsu, MD, and Erin L. Hsu, PhD
Paper 18. Characterization Of Calcified Fibrocartilage within the Lumbar Vertabrae Before and After Standard Cortical Endplate Preparation
Sarina Sinclair, Michael Daubs, Brandon Lawrence, Darrel Brodke, and Alpesh Patel
Paper 19. The Reliability Of The Thoracolumabar Injury Classification And Severity Score Among Orthopedic Surgeons At Different Levels Of Training
Adam J. Bevevino, MD, Ronald A. Lehman, MD, Daniel G. Kang, MD, John P. Cody, MD, Robert W. Tracey, MD, Robert W. Tracey, MD, and Husain Bharmal, MD
Paper 20. The Impact of Nonoperative Treatment, Vertebroplasty, and Kyphoplasty on Survival and Morbidity after a Vertebral Compression Fracture in the Medicare Population
Andrew T. Chen, David B. Cohen, MD, and Richard L. Skolasky
Paper 21. Racial Differences In Lumbar Spinous Process Anatomy Relevant To Interspinous Process Spacer Surgery
Jeremy D. Shaw, BA, Daniel R. Cooperman, MD, Jason D. Eubanks, MD, Daniel L. Shaw, Ling Li, MSPH, and David H. Kim, MD
Paper 22. Adverse clinical outcomes following rhBMP-2 Use in a Minimally Invasive Transforaminal Lumbar Interbody Fusion
Miguel Pelton, B.S., Thomas D. Cha, M.D., Safdar N. Khan, M.D., and Kern Singh, M.D.
Paper 23. Long-term Effects Of Bone Morphogenetic Protein In Lumbar Fusion
Beatrice Ugiliweneza, PhD, MSPH, Chirag G. Patil, MD, MS, Shivanand P. Lad, MD, PhD, Abdul A. Baker, MD, and Maxwell Boakye, MD, MPH
Paper 24. Adverse Events With The Use Of RhBMP-2 In Thoracolumbar And Lumbar Spine Fusions: A Nine Year Institutional Analysis
Daniel Lubelski, Kalil G. Abdullah, Michael P. Steinmetz, MD, Matthew D. Alvin, Amy S. Nowacki, PhD, Edward C. Benzel, MD, and Thomas E. Mroz, MD
Paper 25. The Real Life Use of Bone Morphogenic Protein in the United States
Jason W. Savage, MD, and Paul A. Anderson, MD
Paper 26. Early Failures Following Surgical Treatment For Spinal Stenosis With Lumbar Deformity
Darrel S. Brodke, MD, Prokopis Annis, MD, Brandon D. Lawrence, MD, Justin B. Hohl, MD, Jayme R. Hiratzka, MD, and Michael D. Daubs, MD
Paper 27. Perioperative Complications of Pedicle Subtraction Osteotomy
Michael D. Daubs, MD, Prokopis Annis, MD, Brandon D. Lawrence, MD, and Darrel S. Brodke, MD
Paper 28. The Schwab-SRS Adult Spinal Deformity Classification: Assessment and Clinical Correlations Based On A Prospective Operative and Non-Operative Cohort
Frank Schwab, MD, Virginie Lafage, MD, Christopher Shaffrey, MD, Justin Smith, MD, PhD, Benjamin Blondel, MD, Christopher Ames, MD, Kai-Ming Fu, MD, PhD, Praveen Mummaneni, MD, Douglas Burton, MD, Munish Gupta, MD, Vedat Deviren, MD, Gregory Mundis, MD, Robert Hart, MD, Shay Bess, MD, and International Spine Study Group
Paper 29. Degenerative Lumbar Scoliosis vs. Adult Idiopathic Scoliosis: Long-term Outcomes and Complications Following Surgical Correction
Robert Waldrop, MD, Dennis Crandall, MD, Jan Revella, RN, Michael Chang, MD, and Ryan McLemore, PhD
Paper 30. The Accuracy of Pedicle Screw Insertion Using Intraoperative Three-dimensional Image Guidance
Edward Rainier G. Santos, Jonathan N. Sembrano, MD, Charles Gerald T. Ledonio, MD, A. Noelle Larson, MD, Sharon C. Yson, MD, and David W. Polly Jr., MD
Paper 31. Trans-cranial Motor Evoked Potential Neuromonitoring During Trans-psoas Lumbar Interbody Fusion
Kshitij Chaudhary, MD, Katharine Speights, BS, CNIM, Kevin McGuire, MD, and Andrew P. White, MD
Paper 32. Radiation Exposure To The Spine Surgeon In Lumbar And Thoracolumbar Fusions With The Use Of An Intraoperative Computed Tomography 3-dimensional Imaging System
Daniel Lubelski, Frank S. Bishop, MD, Kalil G. Abdullah, Michael P. Steinmetz, MD, Edward C. Benzel, MD, and Thomas E. Mroz, MD
Paper 33. Implant Footprint and Vertebral Augmentation Improve Resistance to XLIF Interbody Cage Subsidence in Osteoporotic Patients
Benjamin Y. Chen, MD, Wayne K. Cheng, MD, Alexander W. L. Turner, PhD, Bryan Cornwall, PhD, and Mark Peterson, MD
Paper 34. Pedicle Screw “Hubbing” in the Adult and Immature Thoracic Spine: A Biomechanical and Micro-Computed Tomography Evaluation
Daniel G. Kang, Ronald A. Lehman, MD, Adam Bevevino, MD, Anton E. Dmitriev, PhD, Rachel E. Gaume, BS, Haines Paik, MD, and Lawrence G. Lenke, MD
Paper 35. Dynamic Biomechanical Examination of the Lumbar Spine with Implanted Total Disc Replacement (TDR) Utilizing a Pendulum Testing System
Alan H. Daniels, MD, David J. Paller, Sarath Koruprolu, Matthew McDonnell, MD, Mark A. Palumbo, MD, and Joseph J. Crisco, PhD
Paper 36. Clinical Outcomes following Silicate -Substituted Calcium Phosphate use in a Minimally Invasive Transforaminal Lumbar Interbody Fusion
Miguel Pelton, B.S., and Kern Singh, M.D.
Paper 37. The Impact of Diabetes on Spinal Arthrodesis: Analysis of Complications and Outcomes
Robert Waldrop, MD, Dennis Crandall, MD, Jan Revella, RN, Michael Chang, MD, and Ryan McLemore, PhD
Paper 38. Long-term Outcome Of Minimally Invasive Transforaminal Lumbar Interbody Fusion; 5 Years Post-op And Beyond
Kevin T. Foley, M.D., and Hamid Shah, M.D.
Paper 39. Intervertebral Disc-derived Stem Cells: Implications For Regenerative Medicine And Neural Repair
William M. Erwin, DC, PhD, Diana Islam, MSc, Eftekhar Eftekarpour, PhD, Robert Davies Inman, MD FRCP, and Michael George Fehlings, MD, PhD, FRCS(C)
Paper 40. Evaluation of a Novel Bioactive Nanofiber Scaffold to Elicit Spine Fusion in a Rodent Arthrodesis Model
Michael S. Nickoli, M.D., Jason H. Ghodasra, B.S., Marco Mendoza, M.D., Jacob Babu, Mahesh Polavarapu, David Nelson, Kaveesh Maharaj, Samuel I. Stupp, Ph.D., Jeff S. McKee, Ph.D., Shawn F. Bairstow, Ph.D., Erin L. Hsu, Ph.D., and Wellington K. Hsu, M.D.
Paper 41. A Novel Therapeutic Agent for Rescuing the Adverse Effects of Advanced Glycation End-products in the Intervertebral Disc
Alok Sharan, Lee Morse, MD, and Simon Tang
Paper 42. Biomechanical Comparison of Spino-pelvic Fixation Constructs in the setting of Total Sacrectomy
Stefan Mindea, MD, Suresh R. Chinthakunta, Mark Moldavsky, MS, Manasa Gudipally, MS, and Saif Khalil, PhD
Paper 43. Caudad Pedicle Screw Compression Optimizes Thoracic Kyphosis Correction: A Microct And Biomechanical Analysis Of Pedicle Morphology And Screw Failure
Adam J. Bevevino, MD, Ronald A. Lehman, MD, Daniel G. Kang, MD, Haines Paik, MD, Melvin D. Helgeson, MD, Rachel Gaume, BS, Anton E. Dmitriev, PhD, and Lawrence G. Lenke, MD
Paper 44. Tapping Insertional Torque Predicts Better Pedicle Screw Fixation and Optimal Screw Size Selection
Melvin D. Helgeson, MD, Daniel G. Kang, Ronald A. Lehman, MD, Anton E. Dmitriev, PhD, and Scott J. Luhmann, MD
Paper 45. An Evaluation Of The Safety And Complications Of Pharmacologic VTE Prophylaxis After Spine Surgery
David J. Lunardini, MD, Nicholas T. Spina, MD, Omar Ayyash, BS, Antonia F. Chen, MD/MBA, and Joon Y. Lee, MD
Paper 46. Outcome and Treatment of Post-operative Spine Surgical Site Infections: Predictors of Treatment Success and Failure
Keishi Maruo, MD, Sigurd Berven, MD, Serena Hu, MD, Shane Burch, MD, Vedat Deviren, Bobby Tay, MD, Amir Abdul-Jabbar, BA, Ames Christopher, MD, Praveen Mummaneni, MD, Dean Chou, MD, and Steven Takemoto, PhD
Paper 47. Low-grade Isthmic vs. Degenerative Spondylolisthesis: Complications and Outcomes Following Decompression, Reduction, And Arthrodesis
Dennis Crandall, MD, Melissa Gebhardt, PA-C, Jan Revella, RN, Dustin Revella, BA, and Ryan McLemore, PhD
Paper 48. Serum 25-OH Vitamin D Levels in a Population of 51, 314 Patients
Jeffrey M. Bair, M.D., Susan Bukata, M.D., Stephen L. Kates, M.D., Ellen Coyne, M.S., John T. Wright, M.S., and Glenn R. Rechtine, M.D.
Paper 49. Likelihood of Reaching Minimal Clinically Important Difference (MCID) in Health Related Quality of Life (HRQOL) Measures: Prospective Analysis of Operative and Non-operative Treatment of Adult Spinal Deformity (ASD)
Virginie Lafage, PhD, Justin Smith, MD, PhD, Frank Schwab, MD, Christopher Shaffrey, MD, Eric Klineberg, MD, Christopher Ames, Richard Hostin, MD, Kai-Ming Fu, MD, PhD, Praveen Mummaneni, MD, Khaled Kebaish, MD, Vedat Deviren, MD, Oheneba Boachie-Adjei, MD, Robert Hart, MD, Shay Bess, MD, and International Spine Study Group
Paper 50. Pre-Operative Activity Levels do not Correlate to Self-Reported Scores in Patients with Lumbar Spine Disorders: Results of 81 Patients
Rosanna L. Wustrack, Guillermo Ramirez, and Shane Burch, MD

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