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Intervertebral disk

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https://www.readbyqxmd.com/read/28525483/development-of-a-remodeled-caspar-retractor-and-its-application-in-the-measurement-of-distractive-resistance-in-an-in-vitro-anterior-cervical-distraction-model
#1
Junxiang Wen, Jianwei Xu, Lijun Li, Mingjie Yang, Jie Pan, Deyu Chen, Lianshun Jia, Jun Tan
STUDY DESIGN: In vitro biomechanical study of the cervical intervertebral distraction using a remodeled Caspar retractor. OBJECTIVE: To investigate the torques required for distraction to different heights in an in vitro C3-C4 anterior cervical distraction model using a remodeled Caspar retractor, focusing on the influence of the intervertebral disk, posterior longitudinal ligament (PLL), and ligamentum flavum (LF). SUMMARY OF BACKGROUND DATA: No previous studies have reported on the torques required for distraction to various heights or the factors resisting distraction in anterior cervical discectomy and fusion...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28525476/magnetic-resonance-classification-system-of-cervical-intervertebral-disk-degeneration-its-validity-and-meaning
#2
Akinobu Suzuki, Michael D Daubs, Tetsuo Hayashi, Monchai Ruangchainikom, Chenjie Xiong, Kevin Phan, Trevor P Scott, Jeffery C Wang
STUDY DESIGN: Retrospective analysis of kinetic magnetic resonance images (kMRIs). OBJECTIVE: (1) To analyze the changes seen on MRI related to disk degeneration and to develop a new grading system for cervical disk degeneration. (2) To evaluate the reliability and validity of the grading system. SUMMARY OF BACKGROUND DATA: Few have studied the relationship between changes seen on MRI with cervical disk degeneration and the chronological order of disk degeneration...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28525470/factors-affecting-the-nonlinear-force-versus-distraction-height-curves-in-an-in-vitro-c5-c6-anterior-cervical-distraction-model
#3
Junxiang Wen, Jianwei Xu, Lijun Li, Mingjie Yang, Jie Pan, Deyu Chen, Lianshun Jia, Jun Tan
STUDY DESIGN: In vitro biomechanical study of cervical intervertebral distraction. OBJECTIVE: To investigate the forces required for distraction to different heights in an in vitro C5-C6 anterior cervical distraction model, focusing on the influence of the intervertebral disk, posterior longitudinal ligament (PLL), and ligamentum flavum (LF). SUMMARY OF BACKGROUND DATA: No previous studies have reported on the forces required for distraction to various heights or the factors resisting distraction in anterior cervical discectomy and fusion...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28511287/generation-and-characterization-of-highly-purified-canine-schwann-cells-from-spinal-nerve-dorsal-roots-as-potential-new-candidates-for-transplantation-strategies
#4
Nicole Steffensen, Annika Lehmbecker, Ingo Gerhauser, Yimin Wang, Regina Carlson, Andrea Tipold, Wolfgang Baumgärtner, Veronika M Stein
Schwann cells (SCs) are promising candidates for transplantation-strategies in the central nervous system by promoting axonal regeneration. The dog represents a translational model for human spinal cord injury (SCI) for studies with new repair strategies after intervertebral disk herniation (IVDH). To overcome the necessity for an additional surgical procedure, for the first time a protocol for isolation, and purification of canine SCs from spinal-nerve-biopsies during standard hemilaminectomy in IVDH affected paraplegic dogs for potential transplantation was developed...
May 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28468504/dynamic-mechanical-response-of-polyvinyl-alcohol-gelatin-theta-gels-for-nucleus-pulposus-tissue-replacement
#5
Patrick N Charron, Sarah E Blatt, Canaan McKenzie, Rachael A Oldinski
Intervertebral disk degeneration is one of the most significant contributors to low back pain. Thus, there is significant interest in designing new treatments and nucleus pulposus (NP) tissue replacements. Herein, the authors propose a biosynthetic material, comprised of a polyvinyl alcohol (PVA) and gelatin theta-gel, as an acellular NP tissue replacement. Theta-gels form during the solidification of PVA and gelatin (phase I), and the phase separation of a disklike short-chain polyethylene glycol (PEG, phase II)...
May 3, 2017: Biointerphases
https://www.readbyqxmd.com/read/28455212/cardiovascular-effects-and-intraoperative-pharmacokinetics-of-tramadol-in-sheep-undergoing-spinal-surgery
#6
Giulia Maria De Benedictis, Mario Giorgi, Alice Depase, Virginia De Vito, Giorgia Della Rocca, Luca Bellini
OBJECTIVE: To evaluate the pharmacokinetics of two doses of tramadol during isoflurane anaesthesia in sheep and their ability to prevent the cardiovascular response induced by surgical stimulation. STUDY DESIGN: Prospective randomized controlled study. ANIMALS: A total of 12 healthy sheep (mean weight, 47.5±7.9 kg) undergoing lumbar transpedicular intervertebral disk nucleotomy. METHODS: Sheep were sedated with medetomidine, anaesthesia was induced with propofol and maintained with isoflurane at 1...
February 6, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28451842/anterior-cervical-discectomy-without-fusion-for-a-symptomatic-cervical-disk-herniation
#7
Judith D de Rooij, Pravesh S Gadjradj, John S Soria van Hoeve, Biswadjiet S Harhangi
BACKGROUND: Cervical radiculopathy is characterized by dysfunction of the nerve root usually caused by a cervical disk herniation. The most important symptom is pain, radiating from the neck to the arm. When conservative treatment fails, surgical treatment is indicated to relieve symptoms. During the last decades, multiple fusion techniques have been developed, although without clinical evidence for added value of fusion over non-fusion. METHODS: The surgical procedure of anterior cervical discectomy without fusion is performed step by step, leading to removal of the entire intervertebral disk...
April 27, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28443163/using-magnetic-resonance-myelography-to-improve-interobserver-agreement-in-the-evaluation-of-lumbar-spinal-canal-stenosis-and-root-compression
#8
Haider Najim Al-Tameemi, Sattar Al-Essawi, Mahmud Shukri, Farah Kasim Naji
STUDY DESIGN: Cross-sectional retrospective study designed to assess interobserver agreement. PURPOSE: To investigate if interobserver agreement using magnetic resonance imaging (MRI) in the evaluation of lumbar spinal canal stenosis and root compression can be improved upon combination with magnetic resonance myelography (MRM). OVERVIEW OF LITERATURE: The interpretation of lumbar spinal MRI, which is the imaging modality of choice, often has a significant influence on the diagnosis and treatment of low back pain...
April 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28440586/comparison-of-preoperative-quantitative-magnetic-resonance-imaging-and-clinical-assessment-of-deep-pain-perception-as-prognostic-tools-for-early-recovery-of-motor-function-in-paraplegic-dogs-with-intervertebral-disk-herniations
#9
A Wang-Leandro, J S Siedenburg, M K Hobert, P Dziallas, K Rohn, V M Stein, A Tipold
BACKGROUND: Prognostic tools to predict early postoperative motor function recovery (MFR) after thoracolumbar intervertebral disk herniation (IVDH) in paraplegic dogs represent an opportunity to timely implement novel therapies that could shorten recovery times and diminish permanent neurological dysfunctions. HYPOTHESIS: Fractional anisotropy (FA) values obtained using diffusion tensor imaging have a higher prognostic value than a lesion extension ratio in T2-weighted images (T2W-LER) and clinical assessment of deep pain perception (DPP) for MFR...
May 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28437328/is-an-isolated-intervertebral-disk-with-significant-degeneration-magnetic-resonance-imaging-a-cause-of-low-back-pain-that-requires-no-confirmatory-diagnostic-tests
#10
George M Ghobrial, Joshua Heller, Daniel Cataldo, Christopher K Kepler
No abstract text is available yet for this article.
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28434574/50-years-ago-in-the-journal-of-pediatrics-intervertebral-disk-infection-in-children
#11
Sarah S Long
No abstract text is available yet for this article.
May 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28413773/a-m-%C3%A2-avium-complex-spondylodiscitis-in-a-middle-aged-woman-with-diabetes
#12
Irini Gerogianni, Stylianos Boutlas, Theophilos Karachalios, Eythymia Petinaki, Marianna Vlychou, K I Gourgoulianis
Spondylodiscitis, the inflammation of the vertebral bodies and the intervertebral disk space, is the reason for low back pain in a minority of cases. This is caused by various pathogens. Mycobacterium tuberculosis is responsible for 17-39% of all the cases of spondylodiscitis. On the contrast, spondylodiscitis from non tuberculous mycobacteria is extremely rare in literature. We describe a 68 -year old diabetic woman which is the first case of bone marrow involvement by M. intracellulare (member of M avium complex)with spondylodiscitis...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28408266/analysis-of-clinical-results-of-three-different-routes-of-percutaneous-endoscopic-transforaminal-lumbar-discectomy-for-lumbar-herniated-disk
#13
Hyeun Sung Kim, Farid Yudoyono, Byapak Paudel, Jee Soo Jang, Jeong Hoon Choi, Sung Kyun Chung, Jeong Hoon Kim, Il Tae Jang, Seong Hoon Oh, Jae Eun Park, Sol Lee
OBJECTIVE: Percutaneous endoscopic transforaminal lumbar discectomy (PETLD) can be performed by using foraminal, intervertebral and suprapedicular routes. The aim of this study was to assess clinical results of three different routes of percutaneous endoscopic transforaminal lumbar discectomy (PETLD). METHODS: 111 patients who had undergone PETLD between January 2016 and October 2016 were included in this study. PETLD was performed by using the foraminal (group A), intervertebral (group B), and suprapedicular (group C) routes in 32, 46, and 33 patients, respectively...
April 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28377644/finite-element-analysis-of-sagittal-balance-in-different-morphotype-forces-and-resulting-strain-in-pelvis-and-spine
#14
REVIEW
Vincenzo Filardi, Portaro Simona, Giorgio Cacciola, Salvatore Bertino, Luigi Soliera, Andrea Barbanera, Alessandro Pisani, Demetrio Milardi, Bramanti Alessia
In humans, vertical posture acquisition caused several changes in bones and muscles which can be assumed as verticalization. Pelvis, femur, and vertebral column gain an extension position which decreases muscular work by paravertebral muscles in the latter. It's widely known that six different morphological categories exist; each category differs from the others by pelvic parameters and vertebral column curvatures. Both values depend on the Pelvic Incidence, calculated as the angle between the axes passing through the rotation centre of the two femur heads and the vertical axis passing through the superior plate of the sacrum...
June 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28350945/intervertebral-disk-degeneration-and-repair
#15
James Dowdell, Mark Erwin, Theodoe Choma, Alexander Vaccaro, James Iatridis, Samuel K Cho
Intervertebral disk (IVD) degeneration is a natural progression of the aging process. Degenerative disk disease (DDD) is a pathologic condition associated with IVD that has been associated with chronic back pain. There are a variety of different mechanisms of DDD (genetic, mechanical, exposure). Each of these pathways leads to a final common result of unbalancing the anabolic and catabolic environment of the extracellular matrix in favor of catabolism. Attempts have been made to gain an understanding of the process of IVD degeneration with in Vitro studies...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28326305/implications-for-a-stem-cell-regenerative-medicine-based-approach-to-human-intervertebral-disk-degeneration
#16
REVIEW
Petra Kraus, Thomas Lufkin
The human body develops from a single cell, the zygote, the product of the maternal oocyte and the paternal spermatozoon. That 1-cell zygote embryo will divide and eventually grow into an adult human which is comprised of ~3.7 × 10(13) cells. The tens of trillions of cells in the adult human can be classified into approximately 200 different highly specialized cell types that make up all of the different tissues and organs of the human body. Regenerative medicine aims to replace or restore dysfunctional cells, tissues and organs with fully functional ones...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28323703/biomechanical-effects-of-human-lumbar-discography-in-vitro-experiments-and-their-finite-element-validation
#17
Kristen E Lipscomb, Nesrin Sarigul-Klijn, Eric Klineberg, Vivek Mohan
STUDY DESIGN: An experimental and computational finite element analysis of human lumbar spine discography and its resulting effects on disk biomechanics. OBJECTIVE: To characterize the changes in stress and displacement of the human lumbar spine disks after puncture due to discography. SUMMARY OF BACKGROUND DATA: Discography of the intervertebral disk (IVD) may be used to diagnose pathology of the disk and determine whether it may be a source for chronic back pain...
April 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28320029/morphometric-changes-of-the-lumbar-intervertebral-foramen-after-percutaneous-endoscopic-foraminoplasty-under-local-anesthesia
#18
Tatsuhiko Henmi, Tomoya Terai, Akihiro Nagamachi, Koichi Sairyo
Background Percutaneous endoscopic diskectomy (PED) for the lumbar spine is a relatively new technique that is becoming more common due to its relatively less invasive nature. However, one possible serious complication is an exiting nerve injury when the cannula of the endoscope is inserted into the neural canal through the intervertebral foramen. A technique to enlarge the intervertebral foramen, called foraminoplasty, was recently established to insert the cannula safely into an appropriate position in the neural canal...
March 20, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28303561/extraforaminal-lumbar-interbody-fusion-at-the-l5-s1-level-technical-considerations-and-feasibility
#19
Arthur Robert Kurzbuch, Denis Kaech, Pawel Baranowski, Alicja Baranowska, Didier Recoules-Arche
Background Extraforaminal lumbar interbody fusion (ELIF) surgery is a muscle-sparing approach that allows the treatment of various degenerative spinal diseases. It is technical challenging to perform the ELIF approach at the L5-S1 level because the sacral ala obstructs the view of the intervertebral disk space. Methods We reported earlier on the ELIF technique in which the intervertebral disk is targeted at an angle of 45 degrees relative to the midline. In this article we describe the technical process we developed to overcome the anatomic relation between the sacral ala and the intervertebral disk space L5-S1 that hinders the ELIF approach at this level...
March 16, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28295616/associations-between-anesthetic-variables-and-functional-outcome-in-dogs-with-thoracolumbar-intervertebral-disk-extrusion-undergoing-decompressive-hemilaminectomy
#20
J Fenn, E Laber, K Williams, C A Rousse, P J Early, C L Mariani, K R Muñana, S De Decker, H A Volk, N J Olby
BACKGROUND: Outcome of acute experimental spinal cord injury is strongly associated with tissue perfusion and oxygenation. Cardiopulmonary depression could affect outcome in dogs undergoing general anesthesia for surgical treatment of thoracolumbar intervertebral disk extrusion (IVDE). HYPOTHESIS/OBJECTIVES: To evaluate the effects of general anesthesia on functional outcome in dogs undergoing surgery to treat thoracolumbar IVDE. ANIMALS: Eighty-four client-owned dogs with acute thoracolumbar IVDE treated by decompressive hemilaminectomy...
May 2017: Journal of Veterinary Internal Medicine
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