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Editorial. Cervical laminoplasty for degenerative cervical myelopathy: still much more to learn
Karl W. Janich  MD and Marjorie C. Wang  MD, MPH
doi : 10.3171/2022.5.SPINE22374
Volume 38: Issue 1 (Jan 2023)
Predictors for cervical kyphotic deformity following laminoplasty: a systematic review and meta-analysis
Samuel D. Pettersson , Paulina Skrzypkowska , Shan Ali  MD , Tomasz Szmuda  MD, PhD , Michał Krakowiak  MD , Tadej Po�ivavšek , Fanny Sunesson , Justyna Fercho  MD , and Grzegorz Miękisiak  MD, PhD
doi : 10.3171/2022.4.SPINE22182
Laminoplasty is a common treatment for cervical spondylotic myelopathy (CSM) and for ossification of the posterior longitudinal ligament (OPLL). However, approximately 21% of patients undergoing laminoplasty develop cervical kyphotic deformity (KD).
Influence of clinical and radiological parameters on the likelihood of neurological improvement after surgery for degenerative cervical myelopathy
Nathaniel Toop  MD , Connor S. Gifford  MS , Ben G. McGahan  MD , David Gibbs  BS , Shelby Miracle  BA , Jan M. Schwab  MD, PhD , Rouzbeh Motiei-Langroudi  MD , and H. Francis Farhadi  MD, PhD
doi : 10.3171/2022.6.SPINE2234
Degenerative cervical myelopathy (DCM) is routinely treated with surgical decompression, but disparate postoperative outcomes are frequently observed, ranging from complete neurological recovery to persistent decline.
Clinical significance of the C2 slope after multilevel cervical spine fusion
Namhoo Kim  MD , Kyung-Soo Suk  MD, PhD , Ji-Won Kwon  MD , Joonoh Seo  MD , Hunjin Ju  MD , Byung Ho Lee  MD, PhD , Seong-Hwan Moon  MD, PhD , Hak-Sun Kim  MD, PhD , and Hwan-Mo Lee  MD, PhD
doi : 10.3171/2022.6.SPINE22588
The C2 slope (C2S) is one of the parameters that can determine cervical sagittal alignment, but its clinical significance is relatively unexplored. This study aimed to evaluate the clinical significance of the C2S after multilevel cervical spine fusion.
Effect of surgical experience and spine subspecialty on the reliability of the AO Spine Upper Cervical Injury Classification System
Mark J. Lambrechts  MD , Gregory D. Schroeder  MD , Brian A. Karamian  MD , Jose A. Canseco  MD, PhD , F. Cumhur Oner  MD , Lorin M. Benneker  MD , Richard J. Bransford  MD , Frank Kandziora  MD, PhD , Shanmuganathan Rajasekaran  MD, PhD , Mohammad El-Sharkawi  MD , Rishi Kanna  MD , Andrei Fernandes Joaquim  MD, PhD , Klaus Schnake  MD , Christopher K. Kepler  MD, MBA , Alexander R. Vaccaro  MD, MBA, PhD , and the AO Spine Upper Cervical Injury Classification International Members
doi : 10.3171/2022.6.SPINE22454
The objective of this paper was to determine the interobserver reliability and intraobserver reproducibility of the AO Spine Upper Cervical Injury Classification System based on surgeon experience (< 5 years, 5–10 years, 10–20 years, and > 20 years) and surgical subspecialty (orthopedic spine surgery, neurosurgery, and "other" surgery).
Cervical spondylotic myelopathy with severe axial neck pain: is anterior or posterior approach better?
Andrew K. Chan  MD , Christopher I. Shaffrey  MD , Oren N. Gottfried  MD , Christine Park  BA , Khoi D. Than  MD , Erica F. Bisson  MD, MPH , Mohamad Bydon  MD , Anthony L. Asher  MD , Domagoj Coric  MD , Eric A. Potts  MD , Kevin T. Foley  MD , Michael Y. Wang  MD , Kai-Ming Fu  MD, PhD , Michael S. Virk  MD, PhD , John J. Knightly  MD , Scott Meyer  MD , Paul Park  MD , Cheerag Upadhyaya  MD, MBA, MSc , Mark E. Shaffrey  MD , Avery L. Buchholz  MD, MPH , Luis M. Tumialán  MD , Jay D. Turner  MD, PhD , Giorgos D. Michalopoulos  MD , Brandon A. Sherrod  MD , Nitin Agarwal  MD , Dean Chou  MD , Regis W. Haid Jr.  MD , and Praveen V. Mummaneni  MD, MBA
doi : 10.3171/2022.6.SPINE22110
The aim of this study was to determine whether multilevel anterior cervical discectomy and fusion (ACDF) or posterior cervical laminectomy and fusion (PCLF) is superior for patients with cervical spondylotic myelopathy (CSM) and high preoperative neck pain.
Prediction of 2-year clinical outcome trajectories in patients undergoing anterior cervical discectomy and fusion for spondylotic radiculopathy
Jeffrey J. Hébert  PhD , Tyler Adams  BScKin , Erin Cunningham  BScKin , Dana El-Mughayyar  BSc , Neil Manson  MD, FRCSC , Edward Abraham  MD, FRCSC , Niels Wedderkopp  MD, PhD , Erin Bigney  MA , Eden Richardson  BA , Amanda Vandewint  BSc , Chris Small  MD, FRCSC , George Kolyvas  MD, FRCSC , Andre le Roux  MD, FRCSC , Aaron Robichaud  MD, FRCSC , Michael H. Weber  MD, FRCSC, PhD , Charles Fisher  MHSc, MD, FRCSC , Nicolas Dea  MD, MSc, FRCSC , Stephan du Plessis  MD, MMed , Raphaele Charest-Morin  MD, FRCSC , Sean D. Christie  MD, FRCSC , Christopher S. Bailey  MD, MSc, FRCSC , Y. Raja Rampersaud  MD, FRCSC , Michael G. Johnson  MD, FRCSC , Jerome Paquet  MD, FRCSC , Andrew Nataraj  MSc, MD, FRCSC , Bernard LaRue  MD, FRCSC , Hamilton Hall  MD, FRCSC , and Najmedden Attabib  MD, FRCSC
doi : 10.3171/2022.7.SPINE22592
Anterior cervical discectomy and fusion (ACDF) is often described as the gold standard surgical technique for cervical spondylotic radiculopathy.
Spinal robotics in cervical spine surgery: a systematic review with key concepts and technical considerations
Ryan S. Beyer  BS , Andrew Nguyen  BS , Nolan J. Brown  BS , Julian L. Gendreau  MD , Matthew J. Hatter  BA , Omead Pooladzandi  MS , and Martin H. Pham  MD
doi : 10.3171/2022.7.SPINE22473
Spinal robotics for thoracolumbar procedures, predominantly employed for the insertion of pedicle screws, is currently an emerging topic in the literature.
Patient satisfaction after multiple revision surgeries for adult spinal deformity
Wesley M. Durand  MD , Alan H. Daniels  MD , Kevin DiSilvestro  MD , Renaud Lafage  MSc , Bassel G. Diebo  MD , Peter G. Passias  MD , Han Jo Kim  MD , Themistocles Protopsaltis  MD , Virginie Lafage  PhD , Justin S. Smith  MD, PhD , Christopher I. Shaffrey  MD , Munish C. Gupta  MD , Eric O. Klineberg  MD , Frank Schwab  MD , Jeffrey L. Gum  MD , Gregory M. Mundis Jr.  MD , Robert K. Eastlack  MD , Khaled Kebaish  MD , Alex Soroceanu  MD , Richard A. Hostin  MD , Douglas Burton  MD , Shay Bess  MD , Christopher P. Ames  MD , Robert A. Hart  MD , D. Kojo Hamilton  MD , and the International Spine Study Group
doi : 10.3171/2022.6.SPINE2273
Revision surgery is often necessary for adult spinal deformity (ASD) patients. Satisfaction with management is an important component of health-related quality of life. The authors hypothesized that patients who underwent multiple revision surgeries following ASD correction would exhibit lower self-reported satisfaction scores.
Surgical treatment of young adults with idiopathic scoliosis
Corey T. Walker  MD , Nitin Agarwal  MD , Robert K. Eastlack  MD , Gregory M. Mundis Jr.  MD , Nima Alan  MD , Tina Iannacone  MPH , Behrooz A. Akbarnia  MD , and David O. Okonkwo  MD, PhD
doi : 10.3171/2022.7.SPINE2298
In this study, the authors report on their experience with the surgical treatment of young adults with idiopathic scoliosis (YAdISs) who did not have surgical treatment in adolescence but did require intervention after skeletal maturity.
How common is acute pelvic fixation failure after adult spine surgery? A single-center study of 358 patients
Nathan J. Lee  MD , Paul J. Park  MD , Varun Puvanesarajah  MD , William E. Clifton  MD , Kevin Kwan  MD , Cole R. Morrissette  MD , Jaques L. Williams  BS , Michael W. Fields  MD , Eric Leung  BS , Fthimnir M. Hassan  MPH , Peter D. Angevine  MD , Christopher E. Mandigo  MD , Joseph M. Lombardi  MD , Zeeshan M. Sardar  MD , Ronald A. Lehman Jr.  MD , and Lawrence G. Lenke  MD
doi : 10.3171/2022.7.SPINE22498
There is a paucity of literature on pelvic fixation failure after adult spine surgery in the early postoperative period. The purpose of this study was to determine the incidence of acute pelvic fixation failure in a large single-center study and to describe the lessons learned.
Catastrophic acute failure of pelvic fixation in adult spinal deformity requiring revision surgery: a multicenter review of incidence, failure mechanisms, and risk factors
Christopher T. Martin  MD , Kenneth J. Holton  MD , Benjamin D. Elder  MD, PhD , Jeremy L. Fogelson  MD , Anthony L. Mikula  MD , Christopher J. Kleck  MD , David Calabrese  MS , Evalina L. Burger  MD , David Ou-Yang  MD , Vikas V. Patel  MD , Han Jo Kim  MD , Francis Lovecchio  MD , Serena S. Hu  MD , Kirkham B. Wood  MD , Robert Harper  MD , S. Tim Yoon  MD, PhD , Dheera Ananthakrishnan  MD , Keith W. Michael  MD , Adam J. Schell  MD , Isador H. Lieberman  MD , Stanley Kisinde  MBChB, MMed , Christopher J. DeWald  MD , Michael T. Nolte  MD , Matthew W. Colman  MD , Frank M. Phillips  MD , Daniel E. Gelb  MD , Jacob Bruckner  MD , Lindsey B. Ross  MD , J. Patrick Johnson  MD , Terrence T. Kim  MD , Neel Anand  MD , Joseph S. Cheng  MD , Zach Plummer  MD , Paul Park  MD , Mark E. Oppenlander  MD , Jonathan N. Sembrano  MD , Kristen E. Jones  MD , and David W. Polly Jr.  MD
doi : 10.3171/2022.6.SPINE211559
There are few prior reports of acute pelvic instrumentation failure in spinal deformity surgery. The objective of this study was to determine if a previously identified mechanism and rate of pelvic fixation failure were present across multiple institutions, and to determine risk factors for these types of failures.
Adding sacral anchors through an S1 alar screw and multirod construct as a strategy for lumbosacral junction augmentation: an in vitro comparison to S1 pedicle screws alone with sacroiliac fixation
Aixing Pan  MD , Honghao Yang  MD , Yong Hai  MD, PhD , Yuzeng Liu  MD , Xinuo Zhang  MD , Hongtao Ding  MD , Yue Li  MD , Hongyi Lu  MD , Zihao Ding  MD , Yangyang Xu  PhD , and Baoqing Pei  PhD
doi : 10.3171/2022.6.SPINE22424
Achieving solid fusion of the lumbosacral junction continues to be a challenge in long-segment instrumentation to the sacrum. The purpose of this study was to test the condition of adding sacral anchors through an S1 alar screw (S1AS) and multirod construct relative to using S1 pedicle screws (S1PSs) alone with sacroiliac fixation in lumbosacral junction augmentation.
Prospective, randomized controlled multicenter study of posterior lumbar facet arthroplasty for the treatment of spondylolisthesis
Domagoj Coric  MD , Ahmad Nassr  MD , Paul K. Kim  MD , William C. Welch  MD , Stephen Robbins  MD , Steven DeLuca  DO , Donald Whiting  MD , Ali Chahlavi  MD , Stephen M. Pirris  MD , Michael W. Groff  MD , John H. Chi  MD, MPH , Jason H. Huang  MD , Roland Kent  MD , Robert G. Whitmore  MD , Scott A. Meyer  MD , Paul M. Arnold  MD , Ashvin I. Patel  MD , R. Douglas Orr  MD , Ajit Krishnaney  MD , Peggy Boltes  RN , Yoram Anekstein  MD , and Michael P. Steinmetz  MD
doi : 10.3171/2022.7.SPINE22536
The purpose of this study was to evaluate the safety and efficacy of a posterior facet replacement device, the Total Posterior Spine (TOPS) System, for the treatment of one-level symptomatic lumbar stenosis with grade I degenerative spondylolisthesis.
Radiographic comparison of L5–S1 lateral anterior lumbar interbody fusion cage subsidence and displacement by fixation strategy: anterior plate versus integrated screws
Alekos A. Theologis  MD , Sohan Patel  BS , and Shane Burch  MD
doi : 10.3171/2022.7.SPINE22436
The aim of this study was to radiographically compare cage subsidence and displacement between L5–S1 lateral anterior lumbar interbody fusion (ALIF) cages secured with an anterior buttress plate and cages secured with integrated screws.
Incidence and risk factors of dural ossification in patients with thoracic ossification of the ligamentum flavum
Yongzhao Zhao  MD , Qian Xiang  MD , Shuai Jiang  MD , Jialiang Lin  MD , Longjie Wang  MD , Chuiguo Sun  MD , and Weishi Li  MD
doi : 10.3171/2022.7.SPINE22645
Dural ossification (DO) is a common clinical feature in patients with thoracic ossification of the ligamentum flavum (OLF) and associated with the increased risk of perioperative complications.
Posterior-based resection of spinal meningiomas: an institutional experience of 141 patients with an average of 28 months of follow-up
Alexander F. Haddad  MD , Michael M. Safaee  MD , Matheus P. Pereira  MD , Jun Yeop Oh  BS , Darryl Lau  MD , Lee A. Tan  MD , Aaron J. Clark  MD, PhD , Dean Chou  MD , Praveen V. Mummaneni  MD, MBA , and Christopher P. Ames  MD
doi : 10.3171/2022.7.SPINE211603
Spinal meningiomas pose unique challenges based on the location of their dural attachment. However, there is a paucity of literature investigating the role of dural attachment location on outcomes after posterior-based approach for spinal meningioma resection.
Minimally invasive surgery for spinal cerebrospinal fluid leaks in spontaneous intracranial hypotension
Jürgen Beck  MD , Ulrich Hubbe  MD , Jan-Helge Klingler  MD , Roland Roelz  MD , Luisa Mona Kraus  MD , Florian Volz  MD , Niklas Lützen  MD , Horst Urbach  MD , Kristin Kieselbach  MD , and Christian Fung  MD
doi : 10.3171/2022.7.SPINE2252
Spinal CSF leaks cause spontaneous intracranial hypotension (SIH). Surgical closure of spinal CSF leaks is the treatment of choice for persisting leaks.
Erratum. Total motion generated in the unstable thoracolumbar spine during management of the typical trauma patient: a comparison of methods in a cadaver model
Gillian Shasby  EMBA
Letter to the Editor. Endoscopic decompression for lumbar spinal stenosis
Guang-Xun Lin  MD, PhD and Gang Rui  MD, PhD
