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https://www.readbyqxmd.com/read/28746426/cranio-vertebral-transition-assessment-by-magnetic-resonance-imaging-in-a-sample-of-a-northeast-brazilian-population
#1
Heitor Cabral Frade, Caio César Nuto Leite França, José Jailson Costa do Nascimento, Maurus Marques de Almeida Holanda, Eulâmpio José da Silva, Severino Aires Araújo
Methods: Cross-sectional analysis of craniometric parameters from individuals submitted to magnetic resonance at an outpatient imaging center between 2011 and 2012. Results: Of 181 analyzed cases, the Welcker basal angle averaged 128.96º (SD 6.51), median distance between apex of the odontoid and Chamberlain's line was 2.27 mm (IQR -1.23-4.47) and the median clivus-canal angle was 150.5º (IQR 143.2-157.3). The Welcker basal angle was inversely correlated to the clivus-canal angle, and correlated to the distance between the apex of the odontoid and Chamberlain's line...
July 2017: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/28739203/-odontoid-fracture-in-an-elderly-patient-a-case-report
#2
Amaia Arrieta Salinas, Vincenzo Malafarina, Luis Miranda Orella, Nicolás Martínez Velilla
No abstract text is available yet for this article.
July 21, 2017: Revista Española de Geriatría y Gerontología
https://www.readbyqxmd.com/read/28736355/c2-bone-erosion-secondary-to-iatrogenic-pseudomeningocele-a-case-report-and-description-of-a-novel-surgical-technique
#3
Stephan N Salzmann, Lukas P Lampe, Brian Fernholz, Roger Härtl, Athos Patsalides, Alexander P Hughes
BACKGROUND: Pseudomeningoceles are a rare cause of bone erosions. Development of such erosions in the C2 vertebral body and the odontoid process can lead to life-threatening instability. Treatment options to regain stability include atlantoaxial and occipitocervical fusion. For patients with a history of Chiari decompression and large C2 lesions, common fusion techniques are not always feasible. Additionally fusion surgery sacrifices physiologic motion and is therefore a disabling procedure, especially for young and active patients...
July 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28720985/conservative-management-of-odontoid-peg-fractures-long-term-follow-up
#4
REVIEW
Aheed Osman, Nabil A Alageli, D J Short, W S El Masri
OBJECTIVE: The aim of the study was to look at the long-term effects of conservative management of odontoid peg fractures. METHODS: We reviewed 48 consecutive patients with type II (32) and 16 type III, odontoid peg fractures. The clinical & radiological outcomes were assessed over an average period of follow up of 8 years. Union rate was determined and we discussed several factors that may affect it. Patients were treated conservatively with an average period of bed rest of 4 weeks followed by bracing for an average of 9 weeks...
April 2017: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28713050/the-biomechanical-impact-of-the-facet-tropism-on-the-intervertebral-disc-and-facet-joints-in-the-cervical-spine
#5
Xin Rong, Beiyu Wang, Chen Ding, Yuxiao Deng, Hua Chen, Yang Meng, Weijie Yan, Hao Liu
BACKGROUND CONTEXT: The facet tropism is defined as the angular difference between the left and right facet orientation. The facet tropism was suggested to be associated with the disc degeneration and facet degeneration in the lumbar spine. However, little is known about the relationship between the facet tropism and pathological changes in the cervical spine and the mechanism behind. PURPOSE: This study was conducted to investigate the biomechanical impact of the facet tropism on the intervertebral disc and facet joints...
July 13, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28704908/clinical-results-of-odontoid-fractures-according-to-a-modified-treatment-oriented-classification
#6
Eui-Jin Cho, Se-Hoon Kim, Won-Hyung Kim, Sung-Won Jin, Seung-Hwan Lee, Bum-Joon Kim, Sung-Gon Ha, Sang-Dae Kim, Dong-Jun Lim
OBJECTIVE: Odontoid fracture is common in cervical injury, representing about 20% of total cervical fractures. Classic odontoid fracture classification focused on anatomy of fracture site has no treatment recommendation and a modified treatment-oriented classification of odontoid fracture was suggested in 2005. We reviewed our odontoid fracture patients to assess the feasibility and efficacy of Grauer's classification. METHODS: Between October 2000 and September 2015, we collected data from patients who came to our institute for odontoid fracture...
June 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/28694601/spastic-quadriparesis-due-to-pathological-fracture-of-odontoid-secondary-to-carcinoma-prostate-a-rare-presentation
#7
Maneet Gill, M N Swamy, Vikas Maheshwari, T S Lingaraju, Aishik Mukherjee
Prostate carcinoma presenting as symptomatic metastases to atlantoaxial spine is extremely rare. Spastic quadriparesis due to pathological fracture of odontoid as the only initial manifestation without symptoms of primary malignancy is rarer still. We report a 64-year-old male who presented with progressive spastic quadriparesis along with urinary retention of 3 weeks duration. Computed tomography and magnetic resonance imaging cervical spine and craniovertebral junction showed type III pathological fracture of odontoid with anterior translation of C1 with spinal cord compression...
April 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/28693540/gallie-technique-versus-atlantoaxial-screw-rod-constructs-in-the-treatment-of-atlantoaxial-sagittal-instability-a-retrospective-study-of-49-patients
#8
Bo Yuan, Shengyuan Zhou, Xiongsheng Chen, Zhiwei Wang, Weicong Liu, Lianshun Jia
BACKGROUND: The objectives of this study are to investigate the clinical curative effect of Gallie technique and atlantoaxial screw-rod constructs (SRC) on atlantoaxial sagittal instability and determine the indication of Gallie technique. METHODS: Data of 49 patients with atlantoaxial sagittal instability from February 2008 to May 2015 were analyzed retrospectively. The visual analog scale (VAS) score and the neck disability index (NDI) were used to evaluate the curative effect...
July 11, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28685260/radiological-evolution-of-peri-odontoid-pannus-in-a-patient-with-chiari-i-malformation-a-case-based-review
#9
Felipe Hada Sanders, Joy M H Wang, Rod J Oskouian, R Shane Tubbs, W Jerry Oakes
INTRODUCTION: The Chiari I malformation (CIM) is commonly encountered by neurosurgeons and can have different etiologies and clinical presentations. CASE REPORT: We report a CIM patient who presented with symptoms of ventral brain stem compression and was found to have a large peri-odontoid pannus. Posterior fossa decompression was performed with a planned second-stage odontoidectomy. However, at the 6-month follow-up, postoperative images demonstrated a mostly resolved pannus and improvement of the brain stem compression symptoms, and the patient progressed uneventfully without the need for odontoidectomy...
July 6, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28683497/-influence-of-osseous-and-ligamentous-injuries-on-the-stability-of-the-atlantoaxial-complex
#10
Carolin Meyer, Jan Bredow, Elisa Heising, Peer Eysel, Lars Müller, Gregor Stein
Background The odontoid process and the transverse ligament are the most important structures stabilising the atlantoaxial complex. It has not been fully elucidated how injuries of these structures contribute towards instability and a potential narrowing of the spinal canal. Therefore, our investigation aimed to perform a biomechanical analysis of spinal width and dislocation of the odontoid process depending on injuries of the aforementioned structures. Methods In 10 fresh human cadaveric specimens, physiologic flexion and extension were simulated under fluoroscopy in intact specimens and after application of an odontoid process fracture and transverse ligament rupture in a crossover design...
June 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28673824/incorporating-ligament-laxity-in-a-finite-element-model-for-the-upper-cervical-spine
#11
Timothy L Lasswell, Duane S Cronin, John B Medley, Parham Rasoulinejad
BACKGROUND CONTEXT: Predicting physiological range of motion (ROM) using a finite element (FE) model of the upper cervical spine requires the incorporation of ligament laxity. The effect of ligament laxity can only be observed on a macro level of joint motion and is lost once ligaments have been dissected and preconditioned for experimental testing. As a result, although ligament laxity values are recognized to exist, specific values are not directly available in the literature for use in FE models...
June 30, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28666651/restrictions-of-cervical-flexion-after-laminoplasty-increase-in-the-mechanical-stress-at-the-occipitocervical-junction-in-non-rheumatoid-arthritis-patients
#12
Sho Dohzono, Hiromitsu Toyoda, Shinji Takahashi, Akinobu Suzuki, Hidetomi Terai, Hiroaki Nakamura
Increased range of motion (ROM) at O-C2 after cervical laminoplasty is thought to be a compensatory change due to loss of cervical ROM after surgery. Retro-odontoid pseudotumor in non-RA patients is also caused by loss of ROM at C2-C7 causing mechanical stress on upper cervical spine. The aim of this study was to measure the occipitocervical alignment before and after cervical laminoplasty, and examine the factors associated with postoperative retro-odontoid soft tissue (ROST) enlargement. The study comprised 72 non-RA patients (51 males and 21 females, mean age 65...
June 27, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28647658/is-it-feasible-to-treat-odontoid-fractures-via-primary-posterior-reduction-and-fixation-without-fusion
#13
Dejun Zhong, Guangzhou Lee, Yehui Liao, Qing Wang
No abstract text is available yet for this article.
June 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28628156/-atlantoaxial-reduction-and-fixation-guided-by-the-intraoperative-ct
#14
(no author information available yet)
OBJECTIVE: To evaluate the clinical result of atlantoaxial reduction and fixation guided by the intraoperative CT. METHODS: Sixteen cases were retrospectively studied, including seven males and nine females, with the mean age of 49.9 years. Twelve cases were diagnosed as chronic atlantoaxial instability or dislocation, while four cases as acute odontoid fracture and dislocation. Among the sixteen cases, fourteen underwent atlantoaxial fusion, while two underwent temporary atlantoaxial fixation without fusion...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28627291/early-complications-morbidity-and-mortality-in-octo-and-nonagenarians-undergoing-posterior-intraoperative-spinal-navigation-based-c1-2-fusion-for-type-ii-odontoid-process-fractures
#15
Basem Ishak, Till Schneider, Valerie Gimmy, Andreas W Unterberg, Karl L Kiening
Type II odontoid fractures represent the most common cervical spine injury in the elderly. The decision for surgical treatment is still controversial, particularly with regard to the elevated perioperative risk attributed to frequent comorbidities and poor bone quality. Purpose of this study was to assess both short-term mortality and mid-term clinical and radiological outcome in the elderly. Between January 2007 and December 2015, 35 patients with type II odontoid process fractures who underwent posterior atlanto-axial instrumentation using a modified Goel-Harms technique were retrospectively analyzed and prospectively examined clinically and radiologically...
June 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28621629/endoscopic-endonasal-odontoid-resection-with-real-time-intraoperative-image-guided-computed-tomography-report-of-4-cases
#16
Harminder Singh, Sarang Rote, Ajit Jada, Evan D Bander, Gustavo J Almodovar-Mercado, Walid I Essayed, Roger Härtl, Vijay K Anand, Theodore H Schwartz, Jeffrey P Greenfield
The authors present 4 cases in which they used intraoperative CT (iCT) scanning to provide real-time image guidance during endonasal odontoid resection. While intraoperative CT has previously been used as a confirmatory test after resection, to the authors' knowledge this is the first time it has been used to provide real-time image guidance during endonasal odontoid resection. The operating room setup, as well as the advantages and pitfalls of this approach, are discussed. A mobile intraoperative CT scanner was used in conjunction with real-time craniospinal neuronavigation in 4 patients who underwent endoscopic endonasal odontoidectomy for basilar invagination...
June 16, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28608179/anterior-submandibular-retropharyngeal-odontoid-osteotomy-and-posterior-atlantoaxial-fusion-for-irreducible-atlantoaxial-dislocation-associated-with-odontoid-fracture-malunion
#17
Cheng Li, Jingzhu Duan, Lei Li
PURPOSE: To report a case of complex odontoid fracture malunion accompanied by atlantoaxial dislocation which was treated with a new surgical approach. METHODS: A 53-year-old female was admitted due to progressive symptoms with a stiff limp and unsteady gait. Preoperative examination, diagnostic radiography, computed tomography, and magnetic resonance imaging were performed following admission. The examinations showed odontoid fracture malunion, an old right axial zygapophyseal fracture, atlantoaxial dislocation, and spinal cord injury...
June 12, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28577039/how-i-do-it-cranial-setup-for-cranial-settling
#18
Eugenio Cárdenas Ruiz-Valdepeñas, A Kaen, G Perez Prat
BACKGROUND: Expanded endonasal endoscopic techniques allow us to treat several pathologies related to the odontoid process and craniocervical junction. Cases such as giant basilar invagination represent a surgical challenge. METHODS: The authors provide technical nuances and describe how to complete an endoscopic endonasal odontoidectomy and release the craniocervical junction with the aim of restoring a correct sagittal balance in cases with giant basilar invagination...
June 2, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28525479/outcome-of-bilateral-c1-laminar-hooks-combined-with-c2-pedicle-screw-fixation-for-the-treatment-of-c1-c2-instability-a-report-of-18-cases-from-a-single-chinese-center
#19
Lifeng Lao, Guibin Zhong, Qianyi Li, Xinfeng Li, Bin Chen, Lie Qian, Zude Liu
STUDY DESIGN: A retrospective technical report. OBJECTIVE: To assess the effect of bilateral C1 laminar hooks combined with C2 pedicle screw fixation for the treatment of C1-C2 instability. SUMMARY OF BACKGROUND DATA: Various posterior atlantoaxial fixations for C1-C2 instability have been developed. However, due to anatomic anomalies of the vertebral artery, the smallness of the pedicle, trajectories of broken screws, or a lack of surgical experience, a simple atlantoaxial fixation technique with good safety and effectiveness is urgently needed...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28524792/analysis-and-interrater-reliability-of-pb-c2-using-mri-and-ct-data-from-the-park-reeves-syringomyelia-research-consortium-on-behalf-of-the-pediatric-craniocervical-society
#20
Todd C Hankinson, Gerald F Tuite, Dagmara I Moscoso, Leslie C Robinson, James C Torner, David D Limbrick, Tae Sung Park, Richard C E Anderson
OBJECTIVE The distance to the ventral dura, perpendicular to the basion to C2 line (pB-C2), is commonly employed as a measure describing the anatomy of the craniovertebral junction. However, both the reliability among observers and the clinical utility of this measurement in the context of Chiari malformation Type I (CM-I) have been incompletely determined. METHODS Data were reviewed from the first 600 patients enrolled in the Park-Reeves Syringomyelia Research Consortium with CM-I and syringomyelia. Thirty-one cases were identified in which both CT and MRI studies were available for review...
May 19, 2017: Journal of Neurosurgery. Pediatrics
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