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https://www.readbyqxmd.com/read/29145437/assessment-of-the-suitability-of-biodegradable-rods-for-use-in-posterior-lumbar-fusion-an-in-vitro-biomechanical-evaluation-and-finite-element-analysis
#1
Fon-Yih Tsuang, Yueh-Ying Hsieh, Yi-Jie Kuo, Chia-Hsien Chen, Feng-Huei Lin, Chen-Sheng Chen, Chang-Jung Chiang
Interbody fusion with posterior instrumentation is a common method for treating lumbar degenerative disc diseases. However, the high rigidity of the fusion construct may produce abnormal stresses at the adjacent segment and lead to adjacent segment degeneration (ASD). As such, biodegradable implants are becoming more popular for use in orthopaedic surgery. These implants offer sufficient stability for fusion but at a reduced stiffness. Tailored to degrade over a specific timeframe, biodegradable implants could potentially mitigate the drawbacks of conventional stiff constructs and reduce the loading on adjacent segments...
2017: PloS One
https://www.readbyqxmd.com/read/29121960/non-invasive-quantification-of-age-related-changes-in-the-vertebral-endplate-in-rats-using-in-vivo-dce-mri
#2
Hui Li, Jia-Zhi Yan, Yong-Jie Chen, Wei-Bo Kang, Jia-Xi Huang
BACKGROUND: Small animal models that can mimic degenerative disc disease (DDD) are commonly used to examine DDD progression. However, assessments such as histological studies and macroscopic measurements do not allow for longitudinal studies because they can only be completed after the animal is sacrificed. Dynamic contrast-enhanced MRI (DCE-MRI) may provide a reliable, non-invasive in vivo method for detecting the progression. METHODS: The present study investigated the progression of changes in lumbar discs and the effect of endplate conditions on diffusion into the lumbar discs of aging sand rats after intravenous administration of gadolinium-containing contrast medium through the tail vein...
November 9, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29119066/bipolar-radiofrequency-facet-ablation-of-the-lumbar-facet-capsule-an-adjunct-to-conventional-radiofrequency-ablation-for-pain-management
#3
Robert E Jacobson, Ovidiu Palea, Michelle Granville
Radiofrequency facet ablation (RFA) has been performed using the same technique for over 50 years. Except for variations in electrode size, tip shape, and change in radiofrequency (RF) stimulation parameters, using standard, pulsed, and cooled RF wavelengths, the target points have remained absolutely unchanged from the original work describing RFA for lumbar pain control. Degenerative changes in the facet joint and capsule are the primary location for the majority of lumbar segmental pathology and pain. Multiple studies show that the degenerated facet joint is richly innervated as a result of the inflammatory overgrowth of the synovium...
September 1, 2017: Curēus
https://www.readbyqxmd.com/read/29117256/mri-defined-paraspinal-muscle-morphology-in-japanese-population-the-wakayama-spine-study
#4
Takahide Sasaki, Noriko Yoshimura, Hiroshi Hashizume, Hiroshi Yamada, Hiroyuki Oka, Ko Matsudaira, Hiroki Iwahashi, Kazunori Shinto, Yuyu Ishimoto, Keiji Nagata, Masatoshi Teraguchi, Ryohei Kagotani, Shigeyuki Muraki, Toru Akune, Sakae Tanaka, Hiroshi Kawaguchi, Kozo Nakamura, Akihito Minamide, Yukihiro Nakagawa, Munehito Yoshida
OBJECTIVE: This study aimed to establish sex- and age-dependent distributions of the cross sectional area and fatty infiltration ratio of paraspinal muscles, and to examine the correlation between paraspinal muscle degeneration and low back pain in the Japanese population. METHODS: In this cross-sectional study, data from 796 participants (241 men, 555 women; mean age, 63.5 years) were analyzed. The measurement of the cross sectional area and fatty infiltration ratio of the erector spinae and multifidus from the level of T12/L1 to L4/5 and psoas major at the level of T12/L1 was performed using axial T2-weighted magnetic resonance imaging...
2017: PloS One
https://www.readbyqxmd.com/read/29115481/sparstolonin-b-prevents-lumbar-intervertebral-disc-degeneration-through-toll-like-receptor-4-nadph-oxidase-activation-and-the-protein-kinase-b-signaling-pathway
#5
Jianhua Ge, Long Chen, Yunkang Yang, Xiaobo Lu, Zhou Xiang
Intervertebral disc degeneration (IVDD) is the most common pathogeny of lumbago. It is the pathological basis for a series of spinal degenerative diseases. For a long time, the diagnosis and treatment of lumbago have rendered difficult, since the pathogeny has not been identified. Therefore, the present study aimed to investigate the protective effect of Sparstolonin B in preventing lumbar intervertebral disc degeneration, and explored its potential mechanism in rats. Firstly, Sparstolonin B effectively reduced the histological score of disc degeneration and increased endplate porosity of L2 superior endplates in a lumbar IVDD rat model...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29108667/clinical-electrophysiological-genetic-and-imaging-features-of-six-chinese-han-patients-with-hereditary-neuropathy-with-liability-to-pressure-palsies-hnpp
#6
Bin Chen, Songtao Niu, Xingao Wang, Wei Li, Na Chen, Zaiqiang Zhang
Hereditary neuropathy with liability to pressure palsies (HNPP) is an autosomal dominant peripheral neuropathy caused by mutations in the peripheral myelin protein 22 (PMP22) gene. This study summarizes the clinical, electrophysiological, genetic, and imaging features of six unrelated Chinese Han patients with HNPP. Age of onset was within the second decade in five patients, and 46 years of age in one patient. Weakness or numbness in a unilateral lower extremity was the most common symptom in 5 patients, and bilateral sensorineural hearing loss was also detected in one patient...
November 3, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29100514/expression-of-adiponectin-in-the-subchondral-bone-of-lumbar-facet-joints-with-different-degrees-of-degeneration
#7
Qi Lai, Yuan Liu, Leitao Huang, Xuqiang Liu, Xionglong Yu, Qiang Wang, Runsheng Guo, Jianghao Zhu, Hanxiong Cheng, Min Dai, Bin Zhang
BACKGROUND: Osteoarthritis research has been most commonly performed in the setting of the articular cartilage of the knee. To the best of our knowledge, no studies have evaluated the role of adiponectin in osteoarthritis of the lumbar facet joint (FJOA). Therefore, in this study, we explored whether adiponectin was expressed in the lumbar facet joints and evaluated the role of adiponectin in FJOA. METHODS: We enrolled patients who underwent lumbar computed tomography (CT) and magnetic resonance imaging (MRI) at the Orthopedic Department of the First Affiliated Hospital of Nanchang from May 2015 to June 2016...
November 3, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29099857/knockout-of-apolipoprotein-e-in-rabbit-promotes-premature-intervertebral-disc-degeneration-a-new-in-vivo-model-for-therapeutic-approaches-of-spinal-disc-disorders
#8
Anja Beierfuß, Hermann Dietrich, Christian Kremser, Monika Hunjadi, Andreas Ritsch, Thomas Rülicke, Claudius Thomé, Demissew Shenegelegn Mern
Intervertebral disc (IVD) degeneration that accelerates the loss of disc structural and functional integrities is recognized as one of the major factors of chronic back pain. Cardiovascular risk factors, such as deficits of apolipoproteins that elevate the levels of cholesterol and triglycerides, are considered critical for the progress of atherosclerosis; notably in the abdominal aorta and its lumbar branching arteries that supply lumbar vertebrae and IVDs. Obstruction of the lumbar arteries by atherosclerosis is presumed to promote lumbar disc degeneration and low back pain...
2017: PloS One
https://www.readbyqxmd.com/read/29090607/the-role-of-blood-and-csf-biomarkers-in-the-evaluation-of-new-treatments-against-multiple-sclerosis
#9
Jan Lycke, Henrik Zetterberg
Multiple sclerosis (MS) is an immune-mediated chronic neurodegenerative disease of the central nervous system (CNS). Therapeutic interventions with immunomodulatory agents reduce disease activity and disability development, which are monitored clinically and by magnetic resonance imaging (MRI). However, these measures largely lack information on the impact from these therapies on inflammation, demyelination and axonal injury, the essential pathophysiological features of MS. Several biomarkers for inflammation and neurodegeneration have been detected in cerebrospinal fluid (CSF)...
November 9, 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29080003/percutaneous-posterolateral-approach-for-the-simulation-of-a-far-lateral-disc-herniation-in-an-ovine-model
#10
Stefan Schwan, Christopher Ludtka, Ingo Wiesner, Andre Baerthel, Andrea Friedmann, Felix Göhre
PURPOSE: This work describes a minimally invasive damage model for ovine lumbar discs via partial nucleotomy using a posterolateral approach. METHODS: Two cadavers were dissected to analyze the percutaneous corridor. Subsequently, 28 ovine had their annulus fibrosus punctured via awl penetration under fluoroscopic control and nucleus pulposus tissue removed via rongeur. Efficacy was assessed by animal morbidity, ease of access to T12-S1 disc spaces, and production of a mechanical injury as verified by discography, radiography, and histology...
October 27, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29071411/a-comparison-of-the-type-ix-collagen-levels-of-the-intervertebral-disc-materials-in-diabetic-and-non-diabetic-patients-who-treated-with-lumbar-microdiscectomy
#11
Metin Kaplan, Lutfu Arici, Sait Ozturk, Bengu Cobanoglu Simsek, Omer Batu Hergunsel, Fatih Serhat Erol
PURPOSE: The purpose of this study was to compare type IX collagen levels in the intervertebral disc (IVD) materials of diabetic and non-diabetic patients with lumbar disc herniation and to determine whether there is a relationship between diabetes mellitus (DM) and type IX collagen levels in degenerated discs. METHODS: Overall, 30 non-diabetic patients and 30 type II diabetic patients who underwent lumbar microdiscectomy were included in this study. All patients underwent lumbar microdiscectomy, and IVD samples were obtained during the surgery...
October 25, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29067951/radiological-analysis-of-thoracolumbar-junctional-degenerative-kyphosis-in-patients-with-lumbar-degenerative-kyphosis
#12
Chen-Jun Liu, Zhen-Qi Zhu, Kai-Feng Wang, Shuo Duan, Shuai Xu, Hai-Ying Liu
BACKGROUND: Thoracolumbar junction (TLJ) is the transitional area between the lower thoracic spine and the upper lumbar spine. Vertebral compression fractures and proximal junctional kyphosis following spine surgery often occur in this area. Therefore, the study of development and mechanisms of thoracolumbar junctional degeneration is important for planning surgical management. This study aimed to review radiological parameters of thoracolumbar junctional degenerative kyphosis (TLJDK) in patients with lumbar degenerative kyphosis and to analyze compensatory mechanisms of sagittal balance...
November 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29063365/intervertebral-disc-degeneration-an-experimental-and-numerical-study-using-a-rabbit-model
#13
Andrea Calvo-Echenique, José Cegoñino, Laura Correa-Martín, Luciano Bances, Amaya Pérez-Del Palomar
Animal models have been extensively used for the study of degenerative diseases and evaluation of new therapies to stop or even reverse the disease progression. The aim of this study is to reproduce lumbar intervertebral disc degeneration in a rabbit model by performing a percutaneous annular puncture at L4L5 level. The effect of this damage on the spine behaviour was analysed combining three different techniques: imaging processing, mechanical testing and computational modelling. Twenty New Zealand white rabbits were divided into control and experimental groups and followed up during 6 months...
October 23, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29055739/mesenchymal-progenitor-cells-primed-with-pentosan-polysulfate-promote-lumbar-intervertebral-disc-regeneration-in-an-ovine-model-of-microdiscectomy
#14
Chris D Daly, Peter Ghosh, Andrew C W Zannettino, Tanya Badal, Ronald Shimmon, Graham Jenkin, David Oehme, Kanika Jain, Idrees Sher, Angela Vais, Camilla Cohen, Ronil V Chandra, Tony Goldschlager
BACKGROUND CONTEXT: Neural compression associated with lumbar disc herniation is usually managed surgically by microdiscectomy. However, 10 - 20% patients re-present with debilitating back pain and approximately 15% require further surgery. PURPOSE: Using an ovine model of microdiscectomy, the present study investigated the relative potential of pentosan polysulfate primed mesenchymal progenitor cells (pMPCs) or MPC alone implanted into the lesion site, to facilitate disc recovery...
October 18, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29054367/monoamine-oxidase-b-inhibitor-protects-degenerating-spinal-neurons-enhances-nerve-regeneration-and-functional-recovery-in-sciatic-nerve-crush-injury-model
#15
Al-Shimali M Hussain, Waleed M Renno, Hanaa L Sadek, Noura M Kayali, Aseel Al-Salem, Muddanna S Rao, Khalid M Khan
Monoamine oxidase-B (MAOB), a flavin adenine dinucleotide (FAD), is an enzyme which catalyzes the oxidation of amines. MAOB is proposed to play a major role in the pathogenesis of neurodegeneration through the production of reactive oxygen species (ROS) and neurotoxins. The present study was designed to outline the effects of the MAOB inhibitor (MAOB-I) on neuroprotection of spinal neurons, regeneration of sciatic nerve fibers, and recovery of sensory-motor functions in the sciatic nerve crush injury model...
October 17, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29050895/minimal-invasive-lumbar-spine-revision-surgery-at-distance-from-the-dura-and-postsurgical-scar-tissue-extraforaminal-lumbar-interbody-fusion-elif
#16
Arthur R Kurzbuch, Didier Recoules-Arche
Lumbar spine revision surgery is considered as challenging and related to longer operation time and complications because of the loss of anatomical landmarks and the formation of postoperative epidural fibrosis. Minimal invasive lumbar spinal surgery techniques have been refined over the last 5 years but the reexposure of the dura, the formation of postsurgical scar tissue and related dural tears remain a source of complications. For lumbar spinal revision surgery we advocate the minimal invasive Extraforaminal Lumbar Interbody Fusion (ELIF) technique...
October 16, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29042621/postnatal-development-of-the-murine-notochord-remnants-quantified-by-high-resolution-contrast-enhanced-microct
#17
Sameer Bhalla, Kevin H Lin, Simon Y Tang
The notochord gives rise to spinal segments during development, and it becomes embedded within the nucleus pulposus of the intervertebral disc (IVD) during maturation. The disruption of the notochord band has been observed with IVD degeneration. Since the mechanical competence of the IVD relies on its structural constituents, defining the structure of the notochord during aging is critical for investigations relating to IVD function and homeostasis. The assessment and imaging of the notochord has classically relied on histological techniques, which introduces sectioning artifacts during preparation and spatial biases...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29039507/effect-of-the-adenovirus%C3%A2-mediated-wip1-gene-on-lumbar-intervertebral-disc-degeneration-in-a-rabbit-model
#18
Yuan Wang, Yong Yang, Jing-Chuan Sun, Qin-Jie Kong, Hai-Bo Wang, Jian-Gang Shi
The present study aimed to investigate the effect of the adenovirus‑mediated wild‑type p53‑induced protein phosphatase 1 (Wip1) gene on lumbar disc degeneration (LDD) in a rabbit model. Adult New Zealand white rabbits were used as experimental subjects. The rabbits were divided into LDD groups (groups A‑C of rabbit models of LDD) and control groups (groups D‑F of normal rabbits). The animals in groups A and D were injected with the Wip1 gene vector, those in groups B and E were injected with an empty vector, and those in groups C and F were injected with phosphate‑buffered saline...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29032381/analysis-of-correlation-between-vertebral-endplate-change-and-lumbar-disc-degeneration
#19
Long Xiao, Chunlin Ni, Jiandong Shi, Zhirong Wang, Suchun Wang, Jianwei Zhang, Aiqing Lu
BACKGROUND To evaluate the correlation between vertebral endplate change and the level of lumbar disc degeneration via magnetic resonance imaging (MRI). MATERIAL AND METHODS A total of 345 patients who were recruited from our hospital from May 2012 to May 2016 were evaluated for the presence of intervertebral disc degeneration or herniation. The degree of degeneration was assessed according to Pfirrmann grade. Vertebral endplate change was evaluated based on the endplate concave angle (ECA), and Modic change on sagittal MRI...
October 15, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29028103/expressions-of-il-1%C3%AE-and-mmp-9-in-degenerated-lumbar-disc-tissues-and-their-clinical-significance
#20
P-B Li, W-J Tang, K Wang, K Zou, B Che
OBJECTIVE: To observe the expression levels of interleukin-1α (IL-1α) and matrix metalloproteinase-9 (MMP-9) in degenerated lumbar disc tissues and to investigate their clinical significance. PATIENTS AND METHODS: Fifty patients with lumbar disc degeneration received the operative treatment were divided into three groups according to the magnetic resonance imaging (MRI) results: protrusion group, extrusion group, and free group. The degenerated intervertebral disc tissues were taken, and the normal intervertebral disc tissues of 20 patients received the operative treatment due to lumbar bursting fracture, and were selected as the control group...
September 2017: European Review for Medical and Pharmacological Sciences
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