Abstract Presentations

Best Papers

Use of ALIF at the lumbosacral junction results in less lumbopelvic fixation failure than TLIF or no interbody fusion following correction of adult spinal deformity
Robert Eastlack, MD

The reherniation after decompression (RAD) score identifies patients at low risk for reherniation after lumbar decompression surgery
Garrett Harada, MD

Global spine outreach (GSO): How to safely establish a sustainable short-term spine deformity outreach program
Gregory Mundis, MD

At what point should the thoracolumbar region be addressed in patients undergoing corrective cervical deformity surgery?
Peter Passias, MD

Are octogenarians at higher risk for complications after elective lumbar spinal fusion surgery compared with younger patients? A study from the Kaiser Permanente National Spine Registry
T. Kent Ganocy, MD

PLF or ALIF+PS: Which has a lower operative nonunion rate? Analysis of a cohort of 2,061 patients from a national spine registry
Elizabeth Norheim, MD

Mild and severe obesity reduce effectiveness of lumbar fusions: One-year patient-reported outcomes in 8,171 patients
Olivia Rice, MD
Low density pedicle screw constructs are associated with lower incidence of proximal junctional failure in adult spinal deformity surgery
Wesley Durand

Incidence and resolution strategies for early onset postoperative leg pain following lumbar total disc replacement
Richard Guyer, MD

Why are DBMs so variable? Influence of fibers, carrier and tissue bank
Gregory Mundis, MD

Rates of loosening, failure and revision of iliac fixation in adult deformity surgery
Robert Eastlack, MD

Cell stiffness decreases with severity of disc degeneration and inflammatory stimulation
Ronald Lehman, MD

Is academic department teaching status associated with adverse outcomes after lumbar fusion for degenerative spine diseases?
Dean, Perfetti, MD, MPH

Nanoroughened microstructured orthopedic implant surfaces induce osteogenesis via soluble signaling factors produced by MSCs
Michael Berger, BS
Safer way for vertebroplasty under fluid mechanics theory
Hsuan Yu Chen, MD

Operative versus nonoperative treatment for adult symptomatic lumbar scoliosis at 5-6 year follow-up: Outcomes and impact of related serious adverse events
Justin Smith, MD, PhD

Do cells matter? In vitro and in vivo analysis of autograft viability
Gregory Mundis, MD

The effects of a single injection of NTG-101 upon neurotrophin expression in a canine model of degenerative disc disease
William Mark Erwin, DC, PhD

Efficacy of surgical decompression in patients with cervical spondylotic myelopathy: Results of the Canadian Prospective Multi-Center Study
Mohammed Karim, MD

Fusion for fracture has no place in a lumbar fusion bundled payment model: An analysis of Medicare beneficiaries
Azeem Malik, MBBS

Cervical disc replacement using a PEEK-on-ceramic implant: Prospective data from seven sites participating in an FDA IDE trial for single-level surgery
Richard Guyer, MD

Two-level cervical disc replacement using a PEEK-on-ceramic device: Prospective outcome data from an FDA IDE trial
Richard Guyer, MD

Predicting severe clinically relevant distal junctional kyphosis development following adult cervical deformity surgery with further distinction from mild asymptomatic episodes
Peter Passias, MD

Poster Grand Rounds

Total disc replacement as a part of adult scoliosis surgical treatment of 205 patients with minimum of two years of follow-up
Thierry Marnay, MD

Current incidence of adjacent segment pathology following lumbar fusion versus motion preserving procedures: A systematic review and meta-analysis of recent projections
Chester Donnally III, MD

Power-assisted pedicle screw placement decreases screw wobble
David Skaggs, MD

Association of preoperative hemoglobin A1c and body mass index with wound infection rate in spinal surgery
Miner Ross, MD, MPH

ATrends in robotic spine surgery: A six-year analysis of morbidity and mortality
Peter Passias, MD

Delayed diagnosis impacted on delayed paralysis in spinal fractures with diffuse idiopathic skeletal hyperostosis: Prospective nationwide study
Ejiiro Okada, MD
Early and sustained improvements in motor function in rats after infusion of allogeneic umbilical cord derived mesenchymal stem cells following spinal cord injury
Mohamad Bydon, MD

In vitro assessment of adjustable lordotic expandable lateral interbody spacers on endplate loading and lordosis correction
Ripul Panchal, DO, FACS

In vitro comparison of novel adjustable-lordotic expandable and static hyperlordotic lateral interbody spacers on endplate loading and lordosis correction
Ripul Panchal, DO, FACS

Artificial intelligence clustering of adult spinal deformity morphology predicts surgical characteristics, alignment, and outcomes
Wesley Durand

Distal junctional failure: a feared complication of adult spinal deformity surgery
Houssam Bouloussa, MD, MS

Assessing methods to prevent pseudarthrosis in ASD surgery of lesser magnitude
Emmanuel McNeely, MS, MHA
Hierarchical surface rougness produced with additive manufacturing technology significantly increases osteogenic cellular differentiation and gene expression when compared to PEEK and smooth titanium surfaces
David Rowe, MD

The impact of osteobiologic subtype selection on perioperative complications and cost in single- and multi-level lumbar spinal fusion
Shane Shahrestani, MS

Physical activity measures in lumbar laminectomy patients: A prospective comparison of fitness tracker measures versus patient-reported outcome measures
Dennis Bienstock, BS

The modification of appropriateness criteria for a cervical deformity corrective surgery
Peter Passias, MD

Impact of predominant preoperative symptoms on outcomes of CDR
Ryan Lee, MBA

A review of time demand, radiation exposure and outcomes of skin-anchored intraoperative 3D navigation in minimally invasive posterior cervical laminoforaminotomy
Avani Vaishnav, MBBS
Propensity-matched comparison of open, navigated and robotic-assisted TLIF
Leah Carreon, MD, MSc

Sagittal balance and outcomes after MIS TLIF for short-segment degenerative spondylolisthesis
Andre Samuel, MD

Improvements in screw placement and accuracy with newer generation robotic-assisted minimally invasive instrumented lumbar fusions
Samuel Schroerlucke, MD

Multimodal pain control regimen for anterior lumbar fusion drastically reduces in-hospital opioid consumption
Jeffrey Gum, MD

A significant number of elective spine surgery plans are altered by a weekly indications conference with high surgeon compliance
Joshua Benton, BA

A multidisciplinary spine clinic model significantly reduces spine surgery utilization
Joshua Benton, BA

Multidisciplinary Abstract Presentations

Session 1, Room 6E

Modifiable polymer promotes a pro-osteogenic, M2-like macrophage phenotype and osteoblastic differentiation of progenitor cell
Joseph Bartolacci

C5 palsy after cervical laminectomy: natural history and risk factors in a ten year series
G. Alexander Jones, MD

Pelvic non-responders, postoperative cervical malalignment, and proximal junctional kyphosis following treatment of adult spinal deformity: influence of realignment strategies on occurrence
Peter Passias, MD

Long-term outcomes following intraosseous basivertebral nerve ablation for the treatment of chronic low back pain: Five-year treatment results from a prospective randomized double-blind sham-controlled multi-center study
Jeffrey Fischgrund, MD

Healthcare costs and characteristics of spinal fusion patients receiving concentrated bone marrow aspirate (BMAC), iliac crest autograft or bone morphogenic protein (BMP) therapy: A retrospective cohort study utilizing administrative claims
Ripsi Patel, MPH

Clinical efficacy of tranexamic acid in posterolateral lumbar fusion: A prospective, randomized controlled trial
Bryce Basques, MD, MHS

Non-linear burst spinal cord stimulation can attenuate pain and catastrophizing in patients with persistent back pain and high psychological distress
Robyn Capobianco, PhD


Session 2, Room 10

Use of predictive machine learning models at the population level has the potential to save cost by directing economic resources to those likely to improve most: A simulation analysis stratified by risk in largest combined US/European ASD registry
Rushikesh Joshi, BS

Is it safe to stop at C7 during multi-level posterior cervical decompression and fusion? Multi-center analysis
Eeric Truumees, MD

Robotic-assisted LSF surgery leads to increased risk of revision surgery, readmission, complications and prolonged opioid utilization compared to non-robotic LSF surgery
Daniel Yang, BS

Fatty infiltration of the lumbar multifidus (LM) may be associated with adjacent segment degeneration (ASD) after fusion for spondylolisthesis
Ping Duan, MD, PhD

Does asymptomatic human immunodeficiency virus (AHIV)-positive status in patients undergoing spinal fusion (SF) for degenerative disc disease (DDD) increase risk for adverse postoperative outcomes?
Bassel Diebo,MD

Achievement of optimal clinical outcomes in adult spinal deformity surgery requires prioritizing realignment goals and varies based on pelvic incidence
Peter Passias, MD

The safety and efficacy of cervical laminectomy and fusion versus cervical laminoplasty surgery in degenerative cervical myelopathy: A prospective randomized trial
Mohamed Soliman, PhD


Session 3, Room 6D

Risk of surgical intervention is nearly normalized following coronary artery bypass grafting in spinal surgery with key exceptions
Peter Passias, MD

Natural language processing for automated identification of intraoperative vascular injury in anterior lumbar spine surgery
Aditya Karhade, MD

Cervical spine steroid injections for delay of surgery for cervical spondylotic myelopathy
Mustfa Manzur, MPH, MS, BS

The collective influence of lumbopelvic mismatch and proportional shape on clinical outcomes and proximal junctional kyphosis following adult spinal deformity corrective surgery
Peter Passias, MD

Does anticoagulant thromboprophylaxis increase bleeding complications in spinal surgery and spinal cord injury? A systematic review and meta-analysis
Anh Nguyen, MD, MSc

Efficacy of topical versus intravenous tranexamic acid in pediatric spinal deformity
Renaud Lafage, MSc

Does baseline thoracolumbar shape influence patterns of cervical decompensation following surgical adult spinal deformity correction?
Peter Passias, MD

C2 SVA: When angles are too complicated and the x-ray is too small
Ronald Lehman, MD

Retrospective comparative analysis of combined versus only posterior approach for treating severe scoliosis
Matevž Topolovec, MD, PhD


Session 4, Room 6F

A comparison of various surgical treatments for cervical spondylotic myelopathy: A propensity score matched analysis
Nathan Lee, MD

Preoperative high frequency opioid use dramatically increases complication rate within 90 days, increases two year reoperation rates, and predisposes to opioid dependency following adult spinal deformity correction
Peter Passias, MD

Utilizing predictive analytics to understand the influence of modifiable risk factors on readmission in patients receiving lumbar spinal fusion
Shane Shahrestani, MS

A novel bone cement screw system combined with vertebroplasty for the treatment of Kummell disease with bone deficiency at vertebral anterior border: Minimum three-year follow-up study
Biao Wang, MD

Failure to normalize risk profile of spine fusion patients with coronary artery disease
Peter Passias, MD

Scoliosis surgery normalizes cardiac function in AIS patients
Vishal Sarwahi, MD

Outpatient minimally invasive lumbar fusion using multimodal analgesic management in the ambulatory surgery setting
Kern Singh, MD

Opioid use prior to adult spine deformity surgery (ASD) worsens postoperative outcomes and risks continued postoperative use, independent of spine deformity magnitude and type of surgery performed: a propensity matched cohort analysis
Breton Line, BS

Critical analysis of anterior/posterior staged versus same day surgery in patients undergoing identical corrective surgery for adult spinal deformity
Peter Passias, MD


Session 5, Room 6AB

Long-term radiographic outcomes following adult spinal deformity surgery
Amit Parekh, DO

Surgical outcomes for upper lumbar disc herniations: A systematic review and meta-analysis of the literature
Murray Echt, MD

Long-term surgical outcomes of thoracic myelopathy caused by ossification of the posterior longitudinal ligament (OPLL) and the ligamentum flavum (OLF)
Kazuhiro Takeuchi, MD

Preoperative regional erector spinae plane blocks reduce opioid use, increase mobilization, and reduce length of stay following lumbar spine fusion
Darrel Brodke, MD

The impact of frailty on patient reported outcome measures following elective thoraco-lumbar spine surgery
Philippe Beauchamp-Chalifour, MD, MSc

A prospective, in-depth analysis of perioperative anterior thigh symptoms associated with a direct lateral access approach for lumbar interbody fusion
Pierce Nunley, MD

Surgical outcomes in Rett syndrome patients are comparable to cerebral palsy patients
Vishal Sarwahi, MD


Session 6, Room 6C

Does the use of interbodies in lumbar fusions affect the reoperation rate for adjacent segment disease (operative ASD)? Data from the Kaiser Permanente National Spine Registry
Calvin Kuo, MD

Fusion and decompression versus decompression only for lumbar facet cysts
Jarren Section, MD

A systematic review on spine surgery complications in the ambulatory surgical center setting
Kern Singh, MD

Preoperative depression predicts prolonged opiate usage following lumbar spine fusion
Xiao Chen, BA

Is percutaneous pedicle screws (PPS) fixation associated with minimized risk of perioperative proximal junctional kyphosis (PJK) in adult spinal deformity?
Gregory Mundis, MD

Calcium phosphates with submicron topography enhance human macrophage M2 polarization in vitro
Lukas van Dijk, MSc

Biomimetic laser-etched titanium promotes gene expression of early bone markers
Roland Beard, MS


Session 7, Room 6D

Titanium plasma spray enhances ability of PEEK to express genes related to bone formation
Roland Beard, MS

Early deformity development following decompressive surgery for lumbar spinal stenosis
Arya Ahmady, MD

Minimally invasive pedicle screws provide similar clinical outcomes to open posterior fusion in the management of adult isthmic spondylolisthesis
Daniel Bowles, MD

Congenital scoliosis patients can attain similar curve correction and perioperative outcomes to AIS patients without the need for hemivertebra excision
Vishal Sarwahi, MD

Benefits of macroscale topography features on and within interbody cages
William Walsh, PhD

Does attachment of the dorsolumbar fascia to a spinous process prosthesis affect kinematics at the operative and adjacent levels? An in vitro human cadaveric model
Daina Brooks, BS

Beta-lactam antibiotic surgical prophylaxis is safe in patients with self-reported penicillin allergies: A cohort study of lumbar spine surgery patients
Kyle Kesler, MD


Session 8, Room 6E

ALIF versus TLIF for isthmic spondylolisthesis: Differences in radiographic outcomes
Daniel Bowles, MD

Multimodal analgesic management for lumbar decompression surgery in the ambulatory setting clinical case series and review of the literature
Kern Singh, MD

Three-dimensional printing of titanium without bone graft outperforms PEEK + autologous Iliac crest bone graft in sheep interbody fusion model
Joseph Laratta, MD

Intravenous V oral acetaminophen administration in perioperative care of one and two level LLIFs with instrumented posterior lumbar fusion: A comparative effectiveness study
Nicole, Utah BS

Indirect decompression for the treatment of degenerative lumbar stenosis: Clinical outcome in a consecutive series of 568 patients
Peter Derman, MD, MBA

The morbidity, readmissions, and cost for pediatric cerebral palsy patients undergoing primary spinal fusion surgery: A national analysis on 2,779 patients
Nathan Lee, MD


Session 9, Room 6E

3D-printed porous biomimetic titanium promotes osteogenic gene expression in murine mesenchymal stem cells
Roland Beard, MS

Spinal fusion with a resorbable mesh pouch in a preclinical posterolateral model
William Walsh, PhD

Ischemic spinal nerve root injury secondary to herniated lumbar intervertebral disc
Paul Bishop, DC, MD, PhD

A biologically-inspired 3D-printed titanium alloy interbody spacer promotes osseointegration in an ovine lumbar interbody fusion model
Margaret Van Horn, PhD

Can the novel lumboiliac triangle technique based on biplane oblique fluoroscopy facilitate transforaminal percutaneous endoscopic lumbar discectomy for patients with L5-S1 disc herniation combined with high iliac crest? A case-control study of 100 patients
Jun-Song Yang, MD

Accuracy of rod contouring to desired angles with and without a template: Implications for achieving desired spinal alignment and outcomes
Justin Smith MD, PhD

Sex-based difference in response to recombinant human bone morphogenetic protein-2 (rhBMP-2) in a rat posterolateral fusion model
Jonathan Paul, MPH, BS


Session 10, Room 6E

Cervical disc arthroplasty for axial neck pain: outcomes up to seven years
Matthew Gornet, MD

Prospective, randomized study of lumbar facet replacement and lumbar interbody fusion for spondylolisthesis
Michael Steinmetz, MD

Reduction in opioid medication use after arthroplasty with Prestige LP™ cervical disc as compared to ACDF in patients with 2-level surgery: A randomized study with 10-year follow-up
Matthew Gornet, MD

The incidence of subsequent lumbar spine surgery after lumbar disc arthroplasty: A minimum two year follow-up
Dean Perfetti, MD, MPH

The current incidence of adjacent segment pathology following cervical disc arthroplasty (CDA) or anterior cervical discectomy and fusion (ACDF): A systematic review and meta-analysis of randomized clinical trials
Chester Donnally III, MD

Secondary surgery rate and five year outcomes of hybrid TDR/ACDF versus multilevel ACDF
Glenn Buttermann, MD

FDA trial of decompression and paraspinous tension band for degenerative spondylolisthesis: 12 months follow-up in 93 subjects
Rick Sasso, MD

Seven-year results of a randomized controlled IDE trial for lumbar artificial discs in single level degenerative disc
Rolando Garcia MD, MPH

Interdisciplinary care may reduce delirium in elderly spine patients: the UT Southwestern Perioperative Optimization of Senior Health Program
Mark Pernik, BA

Epidural electrical stimulation assisted gait improvements in spinal cord injured rats using a combinatorial strategy with scaffolds, compounds, cells, and motor training
Anthony Windebank, MD
Session 1, Room 6F

Long-term follow-up of adolescent idiopathic scoliosis patients who had pedicle screw and fusion to the lower lumbar vertebrae: Low back pain study
Xie En, MD

Opioid use after anterior cervical spine surgery: What is the appropriate prescription quantity?
Francis Lovecchio, MD

Cost utility analysis of a combined approach for surgical correction of adult spinal deformity
Peter Passias, MD

What is the difference in patient outcomes in circumferential minimally invasive (cMIS) versus open correction of adult scoliosis?
Dean Chou, MD

PROMIS scores alone are not a reliable measure of patient outcomes after surgery for lumbar stenosis
Andrew Liu, MD

Assessing the predictive ability of metabolic syndrome-ATP III for survival and complications in patients with metastatic spinal cord compression
Nida Fatima, MD, MBBS

Complications following adult spinal deformity impact length of stay and are driven by intervention severity and can be predicted using a weighted score
Eric Klineberg, MD


Session 2, Room 6E

Rapid recovery pathway utilizing intrathecal morphine decreases overall hospital costs and improves quality of care in adolescent idiopathic scoliosisy
Vishal Sarwahi, MD

Radiographic assessment of fusion: a comparison of interbody spacers, following anterior cervical decompression and fusion
Tianna Bennett, BS

Participation in bundled payments in spine surgery was associated with lower readmission rates: the one-year BPCI-advanced experience
Andrew Pugely, MD

Prospective evaluation of degenerative cervical myelopathy in asymptomatic patients over 60 years
Ankur Narain, MD

The gait deviation index as an indicator of gait abnormality among degenerative spinal pathologies
Damon Mar, PhD

Discharge to subacute rehabilitation is a predictor of wound complications after spine surgery
Daniel Bowles, MD

At-risk tackling techniques in American football
Rachel Bratescu, MD


Session 3, Room 6AB

ALIF generates better correction of the fractional lumbar curve versus posterior instrumentation alone in spinal deformity fusion to the pelvis
Benjamin Geddes, MD

Predictive probability of the global alignment and proportion score for the development of mechanical failure following adult spinal deformity surgery in Asian patients
Mitsuru Yagi, MD, PhD

Effect of osteoporosis and bisphosphonate on reoperations in adult spinal deformity
Peter Passias, MD

A novel bone graft has higher fusion rate than local autologous bone in stand-alone posterolateral fusion: a propensity score adjusted analysis
Scott Daffner, MD

Radiographic predictors of indirect neural decompression in minimally invasive transpsoas lateral interbody fusion
Corey Walker, MD

Clinical significance of lateral pedicle screw malposition in the lumbar spine
Isabel Smith, BS

Drivers of cost in primary single-level lumbar fusion surgery
Raymond Hwang, MD, MS, MBA


Session 4, Room 6D

Degenerative disc disease and isthmic spondylolisthesis have similar outcomes after L5-S1 ALIF
Bryce Basques, MD, MHS

Lumbar discectomy patients who undergo reoperation experience worse clinical outcomes and greater socioeconomic burden four years after the primary procedure
Peter Klassen, MD

Dual thread screw design provides equivalent fixation to upsized screw diameter in revision pedicle screw instrumentation
Joseph Laratta, MD

Preoperative factors associated with outpatient lumbar decompression surgery
Ariana Reyes, MD

Decompression of far-out syndrome using unilateral biportal endoscopy: Surgical techniques and clinical outcome
Man Kyu Park, MD

Zero PCA is an achievable target for postoperative rapid recovery management of AIS patients
Vishal Sarwahi, MD

The incremental clinical benefit of adding layers of complexity to the planning and execution of adult spinal deformity corrective surgery
Peter Passias, MD


Session 5, Room 6F

Even acute preoperative opioid use before adult spinal deformity surgery associated with increased reoperations at five years
Andre Samuel, MD

An enhanced risk-adjustment method for defining bundled payments in complex spine surgery: An analysis of Medicare beneficiaries
Azeem Malik, MBBS

Effects of long-term opioid versus long-term NSAID use prior to lumbar spinal fusion
Alexander Ballatori, BA

Variation in 90-day neurological complications across increasing fusion levels for posterior cervical fusion: a five-year analysis
Bassel Diebo, MD

Residual foraminal stenosis and increasing levels decompressed are risk factors for postoperative C5 palsy
Aaron Buckland, MBBS, FRACS

Enhanced recovery after surgery protocols in spine surgery: Harnessing national data to identify optimal protocols
Murray Echt, MD

High volume surgeons have better surgical outcomes and lower costs
Vishal Sarwahi, MD


Session 6, Room 6D

Enhanced utility with greater number of levels treated for patient-specific, pre-contoured rods in posterior cervical fusion
Peter Passias, MD

Preoperative optimization of modifiable frailty factors reduces risk of hospital-acquired conditions in elective surgical spine patients
Peter Passias, MD

Subacute and chronic preoperative opioid use associated with reoperations in single-level ACDF patients without myelopathy
Andre Samuel, MD

GAP score with modified relative pelvic version (RPV) parameter: GAP-V score
Woojin Cho, MD, PhD

Hounsfield units (HU) on computed tomography (CT) correlates with cage subsidence after lateral lumbar interbody fusion (LLIF)
Dean Chou, MD

Reaching minimal clinically important difference (MCID) is not predictive of improved cost-per-QALY at two years in surgically treated adult spinal deformity (ASD) patients
Richard Hostin, MD

Does navigation make spinal fusion for adolescent idiopathic scoliosis safer? Insights from 17,400 cases from a national database
John Vorhies, MD

Cost effectiveness of adult lumbar scoliosis surgery: An as-treated analysis from the adult symptomatic scoliosis surgery trial with five-year follow-up
Steven Glassman, MD

Variability in SRS 22r outcome measures in non- and operatively treated patients with adolescent idiopathic scoliosis (AIS) greater than 40°
Jared Crasto, MD

Multicenter prospective assessment of outcomes and complications associated with adult spinal deformity surgery in 62 patients with severe global coronal malalignment
Thomas Buell, MD


Session 7, Room 6E

Enhanced utility with greater number of levels treated for patient-specific, pre-contoured rods in posterior cervical fusion
Andre Samuel, MD

Study great expectations on the novel predictor of outcome after spinal surgery
Xie En, MD

Cervical radiographic parameters and patient reported outcomes following Harrington Instrumentation: A minimum 35-years follow-up
Noorullah Maqsoodi, BS

Adoption of enhanced recovery after surgery (ERAS) protocol for lumbar fusion decreases in-hospital postoperative opioid consumption
Ehsan Jazini, MD

Complications and revision rates in minimally invasive Mazor robotic-guided versus fluoroscopic-guided spinal fusions: The MIS ReFRESH prospective comparative study
Christopher Good, MD, FACS

The influence of glycemic control as measured by hemoglobin A1c levels on complications following elective lumbar spinal fusion
Daniel Kiridly, MD, MBA

Effects of blood transfusions on gram-positive versus gram-negative infections in a mouse model of spine implant infection
Peter Hsiue, MD

Optimization of a rat lumbar intervertebral disc degeneration model for low back pain
Stephen Stephan, MD

Concordance between patients’ and surgeons’ expectations of cervical spine surgery
Roland Duculan, MD


Session 8, Room 6F

The impact of Michigan’s new opioid prescribing laws on spine surgery patients: Analysis of the Michigan Spine Surgery Improvement Collaborative (MSSIC)
Ilyas Aleem, MD, MSc, FRCSC

Structural allograft versus polyetheretherketone (PEEK) implants in patients undergoing spinal fusion surgery: A systematic review and meta-analysis
Nida Fatima, MD, MBBS

Neurologic complications following adult spinal deformity and impact on health-related quality of life measures
Eric Klineberg, MD

Cost utility of revision surgery in cervical deformity patients with distal junctional kyphosis
Peter Passias, MD

Increased risk of medical complications in patients with normal pressure hydrocephalus undergoing decompression for cervical myelopathy
Joshua Bell, MD

Outpatient versus inpatient anterior lumbar surgery: a multi-site, comparative analysis of patient safety measures
Alexandre Rasouli, MD

A cadaveric precision and accuracy analysis of augmented reality mediated percutaneous pedicle implant insertion
Camilo Molina, MD

Comparison of current health insurance provider criteria for coverage of lumbar discectomy procedures
Ari Holtzman, MD

Radiographic comparison between conventional laminectomy and a new technique for posterior lumbar decompression: A cadaveric study
Bo Zhang, MD

The use of autologous free vascularized fibula grafts in reconstruction of the mobile spine following tumor resection: Illustrated surgical technique and outcomes
Michiel Bongers, MD
Session 1, Room 6E

Development and validation of machine learning algorithms for predicting mortality following surgery for metastatic spine tumors: Metastatic mortality scoring system (MMS)
Nida Fatima, MD, MBBS

Impact of a centralized spinal orthoses program on cost of care in the hospital setting
Susan Willey, MS, PT

Effectiveness of epidural amniotic fluid injection for low back pain
Glenn Buttermann, MD

Validation of the ACS-NSQIP risk index in a prospective, multicenter adult spinal deformity database
Peter Passias, MD

Factors associated with the failure to meet 90-day estimated survival after the surgical treatment of spinal metastases
Eric Vess, MD

To prevent PJK in Scheuermann’s Kyphosis restore kyphosis to patient’s PI value and choose proximal UIV
Vishal Sarwahi, MD

Radiculitis: Assessing the risk of biologic use in minimally invasive transforaminal lumbar interbody fusions
Aaron Buckland, MBBS, FRACS

Does conflict of interest affect the reported fusion rates with bone graft extenders?
Yu-Po Lee, MD

Assessment of spinopelvic parameters following stand-alone decompression in the patients with lumbar spinal stenosis
Naveed Nabizadeh, MD


Session 2, Room 6C

The timing and incidence of surgical intervention following diagnosis of lumbar disc herniation at military treatment facilities
Ashley Anderson, MD

Generic measures of frailty assessment may be inadequate for the heterogeneity of spine surgery patients: A systematic review of frailty indices used in spine surgery
Jamie Wilson, BA, MD, FRCS

Discrepancy in-patient reported pain using the numeric pain scale and a percentage change to quantify treatment effectiveness after pain injections
Barthelemy Liabaud, MD

Thoracolumbar interfascial plain (TLIP) block and intrathecal fentanyl injection results in an opioid-free peri- and postoperative recovery and early ambulation after percutaneous lumbar spine surgery
Christian Morgenstern, MD, PhD, MSc

Vertebral height restoration following painful vertebral compression fracture: An international multicenter experience using spine jack
Devin Bageac, BS, BA

Minimally invasive surgery mitigates but does not eliminate adverse perioperative outcomes for frail TLIF
Vishal Sarwahi, MD

Propensity-matched analysis of 1,062 patients following minimally invasive versus open sacroiliac joint fusion
Alexander Ballatori, BA

Over reporting disc herniation in lumbar spine MRIs performed for patients with spondylolisthesis
Hossein Elgafy, MD, FRCSC, MBA

Spinal shortening osteotomy as a major factor to improve associated syrinx in scoliotic patient with Chiari 1 Malformation (CM-1)
Zhi Zhao, MD

Limited cost benefit of lateral interbody fusion (LIF) for adult spinal deformity (ASD) surgery in Japan
Tatsuya Yamamoto, MD


Session 3, Room 6D

Operation is no better than nonoperative care in improving pain and disability in chronic low back pain: Long-term results of randomized controlled trials of western China
Xie En, MD

Effect of end plate contact surface topology and structural modulus on subsidence: Comparison of two 3D-printed titanium lateral interbody devices
Ali Kiapour, PhD

A novel testing methodology to quantify multidirectional flexibility properties of the lumbar spine
Daina Brooks, BS

Comparison of a 3D printed truss-based lateral interbody device to an annular lateral interbody device for resistance to subsidence: A cadaveric study
Ali Kiapour, PhD

Compared to gold standard bone SPECT/CT showed superior accuracy in detecting pseudarthrosis
Richard Easton, MD

The safety and efficacy of hydrogen peroxide in controlling blood loss and surgical site infection after multi-segmental lumbar spine surgery: A retrospective, case-controlled study of 2,626 patients
Jun-Song Yang, MD

Spinal stenosis grading in magnetic resonance imaging using deep convolutional neural networks
Suk-Joong Lee, MD

Assessing the impact of surgical and patient factors on recovery kinetics after ASD surgery
Brian Neuman, MD

Multiple revision surgeries are associated with reduced patient satisfaction in adult spinal deformity
Wesley Durand

Healthcare resource utilization in lumbar spine surgery for stenosis: A national claims data analysis
Jayme Koltsov, PhD


Session 4, Room 6E

Biomimetic 3D-printed titanium-alloy interbody spacers demonstrate uniform bone growth over 12 weeks
Margaret Van Horn, PhD

The fate of patients with early postoperative surgical site infections following instrumented lumbar fusion
Christopher Furey, MD

Fostering physical activity after complex lumbar spine surgery: Long-term results of a randomized trial
Roland Duculan, MD

Reducing bioburden in the operating room: Manual cleaning and pulsed-xenon ultraviolet light disinfection produces significant reduction in colony forming units
Ashley Xiong, CCRC

Chronic use of hydromorphone and oxycodone associated with reoperations after lumbar decompression and lumbar interbody fusions
Andre Samuel, MD

Functional outcome and long-term follow up results after surgery for spinal meningiomas: A population-based cohort study
Adrian Elmi Terander, MD, PhD

Comparison of freehand, fluoro-guided, CT navigation, and robot-guided TLIF and ALIF
Aaron Buckland, MBBS, FRACS

The necessity and risk factors of subsequent fusion after decompression alone for lumbar spinal stenosis with lumbar spondylolisthesis: Five years follow-up in two large populations
Hikari Urakawa, MD

Hyperlordotic anterior interbody use without superior articulating process resection has an increased risk of Iiatrogenic neurological injury single level circumferential fusion
Aaron Buckland, MBBS, FRACS


Session 5, Room 6F

The effect of surgical decompression and fusion on functional balance in patients with degenerative lumbar spondylolisthesis
Peter Derman, MD, MBA

Patient reported outcomes in patients who stop following up: Are they doing better or worse than the patients that come back?
Darren Chen, BA

The association of U.S. News & World Report hospital ranking and outcomes following anterior cervical fusions: An analysis of Medicare beneficiaries
Azeem Malik, MBBS

Additional surgery after anterior cervical discectomy and fusion versus posterior foraminotomy for single- or multi-level cervical radiculopathy
Andre Samuel, MD

Postmenopausal women presenting for spinal fusion surgery have abnormal microarchitecture despite normal DXA
Han Jo Kim, MD

Low pelvic incidence (PI) patients are at high risk of over correction following ASD surgery
Alexandra Soroceanu, MD, MPH

Patient specific cervical deformity corrections with consideration of associated risk: Establishment of risk benefit thresholds for invasiveness based on deformity and frailty severity
Peter Passias, MD

Development of a modified frailty index for adult spinal deformities independent of functional changes following surgical correction: A true baseline risk assessment tool
Peter Passias, MD

Complications and outcomes in small versus large surgeries for ASD?
Themistocles Protopsaltis, MD

Operative treatment of adult spinal deformity patients with severe scoliosis: Retrospective review of a prospectively collected multicenter series with minimum two-year follow-up
Thomas Buell, MD


Session 6, Room 6C

Study comparing NTG-101, a growth factor-based therapy with mesenchymal stem cell (MSC) based treatment of degenerative disc disease (DDD) in pre-clinical rodent model
Ajay Matta, PhD

Viable allograft supplement for disc degeneration: Measurable disc height increase at 12 months in first 24 subjects
Douglas Beall, MD

Outcomes with transforaminal endoscopic versus percutaneous laser decompression for contained lumbar herniated disc: a survival analysis of treatment benefit
Kai-Uwe Lewandrowski, MD

Contrary to popular belief, self-image in adult spinal deformity (ASD) is most correlated with physical and social function and mental health and minimally correlated with magnitude of spine deformity
Shay Bess, MD

Outcomes of surgical treatment for patients with mild scoliosis and age appropriate sagittal alignment with minimum two-year follow up
Justin Scheer, MD

Preoperative opioid use associated with increased readmission and reoperation rates following lumbar decompression, instrumentation and fusion
Alex Mierke, MD

Transforaminal lumbar interbody fusion may prevent early postoperative pedicle screw loosening
David Kim, MD

The cross-sectional area of psoas muscle impacts functional outcomes of MI-TLIF for lumbar degenerative diseases
Hikari Urakawa, MD

Change in sagittal alignment after decompression alone in patients with lumbar spinal stenosis: A prospective cohort study
Jamal Bech Bouknaitir, MD

Metabolic bone mineralization disorders (MBD) increase two-year adverse outcome following lumbar short fusion for degenerative lumbar disease
Bassel Diebo, MD


Session 7, Room 6E

Development and validation of a novel scoring tool for predicting facility discharge after elective posterior lumbar fusion
Garrett Harada, MD

The utility of neuromonitoring in cervical myelopathy patients
Kristen Combs, MD

Severity of cervical disc degeneration and health-related quality of life outcomes following anterior cervical discectomy and fusion
Michael Markowitz, DO

Sequential correction of the severe and rigid thoracic kyphoscoliosis: A new technical note and preliminary results
Cao Yang, MD

Is the axial spinal cord classification predictive of intraoperative neurologic alert for pediatric scoliosis patients? A validation study
Smitha Mathew, MD

A predictive model of perioperative myocardial infarction in spine surgery
Peter Passias, MD

Comparative analysis of 30-day readmission, reoperation, and morbidity between lumbar disc arthroplasty performed in the inpatient and outpatient settings utilizing the 2005-2018 ACS-NSQIP datasets
Austen Katz, MD

Racial and ethnic variation in sagittal spinopelvic parameters in an urban setting
Woojin Cho, MD, PhD

The use of fusion mass screws in revision spinal deformity surgery: Preliminary results and analysis
Ashish Mittal, MD

Optimal lumbar lordosis correction for adult spinal deformity with severe sagittal imbalance in patients over age 65: Role of pelvic tilt and pelvic tilt ratio
Jung-Hee Lee, MD, PhD


Session 8, Room 6D

Development of risk stratification predictive models for cervical deformity surgery
Peter Passias, MD

Cost-effectiveness analysis of teriparatide therapy for the prevention of proximal junctional kyphosis/failure and subsequent revision after adult spinal deformity surgery
Ichiro Okano, MD

Evaluation of a nanosynthetic silicated calcium phosphate putty in a posterolateral rabbit spinal fusion model
William Walsh, PhD

Ectopic bone formation by submicron structured calcium phosphates: Role of the innate immune system
Huipin Yuan, PhD

Individual plates versus single plate for multi-level fixation results in superior biomechanics in anterior cervical fusion surgery
Ali Kiapour, PhD

Interbody spacers and instability: Is there a difference in subsidence and range of motion between various cages for osteotomy techniques?
Jens Chapman, MD

Comparison of single-position robot-assisted surgery versus conventional minimally invasive surgery following LLIF: An in vitro assessment
Themistocles Protopsaltis, MD


Session 9, Room 6E

A subtractive biomimetic titanium surface promotes bony ongrowth in an ovine lumbar interbody fusion model
Margaret Van Horn, PhD

Pre-clinical safety and performance assessment of a novel 3D-printed HA-DBM composite scaffold using a rodent posterolateral fusion model
Mark Plantz, BS

A national analysis on complications and readmissions for adult cerebral palsy patients undergoing primary spinal fusion surgery
Nathan Lee, MD

Predictors of inpatient admission in the setting of anterior lumbar interbody fusion
Kern Singh, MD

Relationship between 25-hydroxy vitamin D level and surgical site infection in spine surgery
Serena Liu, MD, MSc

Predicting massive intraoperative blood loss in adult spinal deformity surgery
Alexandra Soroceanu, MD, MPH

Medical optimization after orthopedic spine and total joint arthroplasty decreases readmission
Megan Mooney, MD


Session 10, Room 6F

Management of grade IV pressure ulcer with a novel negative pressure device in traumatic paraplegia subjects
Rajeshwar Srivastava, MD

Hepatitis C virus infection as a predictor of complications and increased costs following primary lumbar fusion surgery
Chester Donnally III, MD

A novel posterior total joint replacement for the lumbar spine as an alternative to fusion: Pilot data for the first 84 patients
John Sielatycki, MD

Occurrence and clinical implications of heterotopic ossification after cervical disc arthroplasty with Prestige LP™ disc at two contiguous levels
Matthew Gornet, MD

Location of the fused level does not affect the behavior of disc replacement adjacent to fusion in hybrid surgery
Tingkui Wu, MD

Kinematic response of cervical disc arthroplasty in different hybrid constructs
Avinash Patwardhan, PhD


Session 11, Room 6D

Long-term outcome following percutaneous image-guided treatment of spinal synovial cysts: A population-based cohort study
Adrian Elmi Terander, MD, PhD

Minimally invasive sacroiliac joint fusion with decortication and bone grafting: Two-year clinical outcomes
Donald Kucharzyk, DO

Percutaneous thermal disc decompression versus percutaneous disc decompression like minimally invasive outpatient procedure of low back pain treatment: Single center one-year experience
Fabrizio Fasoli, MD

Does patient frailty status influence recovery patterns and ultimate outcome following spinal fusion for cervical deformity?
Peter Passias, MD

Persistent opioid use and resource utilization in spine surgery
Kibum Kim, PhD

Exploring perioperative complications of anterior lumber interbody fusion in patients with a history of prior abdominal surgery: A retrospective cohort study
Arbaz Momin, BS

Hospital mark up and outcomes following lumbar fusions: Moving towards the era of transparency in prices
Azeem Malik, MBBS


Session 12, Room 6E

Preoperative medical comorbidities do not affect minimum clinically important difference (MCID) for lumbar fusion in grade one spondylolisthesis
Joseph Laratta, MD

Postoperative glycemic variability as a predictor of adverse outcomes following posterior cervical fusion
Parthik Patel, MD

Opioid use prior to adult spine deformity (ASD) surgery is associated with decreased cost effectiveness: A matched cohort analysis
Breton Line, BS

Detection of scoliosis curve flexibility by means of MRI
Naveed Nabizadeh, MD

Assessment of impact of single photon emission computed tomography (SPECT) on management of degenerative cervical and lumbar disease: A multi-institution survey of spine surgeons
Ruwan Ratnayake, MD

Lumbar vertebral body hounsfield units are associated with cage subsidence after transforaminal lumbar interbody fusion
Donald Fredericks, MD

Cervical paraspinal muscle fatty degeneration does not relate to muscle cross sectional area: Qualitative assessment preferable for cervical sarcopenia
Ashley Xiong, CCRC


Session 13, Room 6F

The impact of preventative multimodal analgesia on postoperative opioid requirement and pain control in patients undergoing lumbar fusions
Alan Villavicencio, MD

Analysis of 27 adolescent idiopathic scoliosis patients corrected with patient specific rods with a minimum of two years follow-up
Federico Solla, MD

Clinically relevant improvement is maintained five years after surgery for spinal stenosis
Leah Carreon, MD, MSc

Patterns of opioid and other prescription medication use in lumbar surgery for spinal stenosis: A national claims database analysis
Tanmaya Sambare, BA

Surgical technique and patient-reported outcomes in adult isthmic spondylolisthesis
Daniel Bowles, MD

Timing of preoperative surgical antibiotic prophylaxis prior to one- to three-level elective lumbar fusion
Parthik Patel, MD
Session 1, Room 6E

Economic burden of nonoperative treatment of adult spinal deformity
Peter Passias, MD

Not without my attending: A survey of public attitudes and perceptions of concurrent and overlapping surgery
Andrew Kim, MS

Opioid use after adult spinal deformity surgery: propensity-matched comparison of Japanese versus American cohorts
Jeffrey Gum, MD

Average lumbar hounsfield units predicts osteoporosis related complications following lumbar spine fusion
Taylor Jackson, MD

Is adjacent segment disease following instrumented short lumbosacral fusion influenced by postoperative sagittal alignment?
Joshua Bell, MD

Allograft reconstructed iliac bone graft donor site remodels to viable bone and its preliminary clinical effectiveness in revision fusion
Glenn Buttermann, MD

Indications, survival and cause of death after surgery for spinal metastatic disease: A retrospective study of 1820 patients in Sweden 2006-2016
Christian Carrwik, MD


Session 2, Room 6F

The risk factors of respiratory complications (RC) after posterior spine deformity surgery (PSDS) for patients with early onset scoliosis (EOS)
Ying Zhang, MD

Defining spino-pelvic alignment goals for adult spinal deformity surgery that optimize outcomes by incorporating age and frailty status
Peter Passias, MD

Establishment of an individualized distal junctional kyphosis risk index taking into account radiographic and surgical components
Peter Passias, MD

The position of the L1 vertebra relative to the gravity line does not appear to correlate with proximal junctional kyphosis following adult spinal deformity (ASD) surgery with two-year follow-up
Zhuo Xi, MD, PhD

Activity goals of patients considering spine surgery: A pilot study
Sheeraz Qureshi, MD, MBA

Choosing touched vertebrae with grade 0/1 rotation on lying down X-rays saves fusion levels, decreases risk of adding on, and prevents translation
Vishal Sarwahi, MD

Incidence, prognosis, and risk factors for bladder and bowel dysfunction due to incidental dural tears in lumbar microendoscopic surgery
Masahito Oshina, MD


Session 3, Room 10

Early postoperative physical activity predicts clinical improvement in disability one-year following spine surgery
Hiral Master, PhD, PT, MPH

Recent trends in spinal surgery performed by American Board of Orthopaedic Surgery (ABOS) part II candidates (2008-2017)
Caleb Yeung, MD

Risk of spinal surgery among individuals who have been re-vascularized for coronary artery disease
Peter Passias, MD

The impact of insurance payor on hospital length of stay and discharge time in adult patients undergoing elective spine surgery
Luke Dosselman, BS

Adjustment of the global alignment and proportion scores accounting for frailty in adult spinal deformity surgical patients
Peter Passias, MD

Global alignment and proportion (GAP) score with modified age factor: GAP-A score
Woojin Cho MD, PhD

The modified adult spinal deformity frailty index (mASD-FI) is a good preoperative risk assessment tool
Peter Passias, MD

Ambulatory neuromuscular scoliosis patients have similar rates of infection, perioperative complications, and revision to adolescent idiopathic scoliosis patients
Vishal Sarwahi, MD

Should selective thoracic fusion be reserved for non-structural compensatory lumbar curves? Radiographic and clinical results from propensity score matched patients at minimum five-year follow-up
Jay Reidler, MD, MPH

Residual coronal malalignment results in less improvement in pain and disability after ASD surgery
Amit Jain, MD