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Cervical intervertebral disc

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https://www.readbyqxmd.com/read/28645289/degenerative-changes-of-the-canine-cervical-spine-after-discectomy-procedures-an-in-vivo-study
#1
Peter Grunert, Yu Moriguchi, Brian P Grossbard, Rodolfo J Ricart Arbona, Lawrence J Bonassar, Roger Härtl
BACKGROUND: Discectomies are a common surgical treatment for disc herniations in the canine spine. However, the effect of these procedures on intervertebral disc tissue is not fully understood. The objective of this study was to assess degenerative changes of cervical spinal segments undergoing discectomy procedures, in vivo. RESULTS: Discectomies led to a 60% drop in disc height and 24% drop in foraminal height. Segments did not fuse but showed osteophyte formation as well as endplate sclerosis...
June 23, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28638296/ultrasound-guided-percutaneous-cervical-and-upper-thoracic-sympathetic-chain-neuromodulation-for-upper-extremity-complex-regional-pain-syndrome
#2
Samer Narouze, Dmitri Souzdalnitski
BACKGROUND: Complex regional pain syndrome (CRPS) comprises a group of conditions characterized by severe, debilitating pain that is disproportionate to any inciting event and is not distributed in a specific nerve distribution or dermatome. CASE REPORT: A 42-year-old female with a 2-year history of right upper extremity CRPS type I refractory to conventional management underwent an ultrasound-guided and fluoroscopy confirmed percutaneous peripheral nerve stimulation trial with a lead extending from the C6 to the T3 level to cover the cervical and upper thoracic sympathetic chain...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28606605/cervical-and-thoracic-intervertebral-disc-hydration-increases-with-recumbency-a-study-in-101-healthy-volunteers
#3
Daniel L Belavy, Matthew Quittner, Yuan Ling, David Connell, Timo Rantalainen
BACKGROUND CONTEXT: Variation in water content and size of the lumbar intervertebral discs (IVDs) is known to occur due to recumbency and has been associated with lumbar IVD herniation risk through the impact of IVD hydration on tissue mechanical properties. It is not clear if similar changes in the cervical or thoracic IVDs occur with recumbency. PURPOSE: Determine whether increases in hydration of thoracic and cervical IVDs occur with short-duration recumbency...
June 9, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28606250/-three-dimensional-finite-element-model-of-a-modified-posterior-cervical-single-open-door-laminoplasty
#4
Q Wang, Y Yang, Q Fei, D Li, J J Li, H Meng, N Su, Z H Fan, B Q Wang
Objective: To build a three-dimensional finite element models of a modified posterior cervical single open-door laminoplasty with short-segmental lateral mass screws fusion. Methods: The C(2)-C(7) segmental data were obtained from computed tomography (CT) scans of a male patient with cervical spondylotic myelopathy and spinal stenosis.Three-dimensional finite element models of a modified cervical single open-door laminoplasty (before and after surgery) were constructed by the combination of software package MIMICS, Geomagic and ABAQUS...
June 6, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28583461/repair-of-v2-vertebral-artery-injuries-sustained-during-anterior-cervical-discectomy
#5
Evgenii Belykh, David S Xu, Kaan Yağmurlu, Ting Lei, Vadim A Byvaltsev, Curtis A Dickman, Mark C Preul, Peter Nakaji
BACKGROUND: The V2 segment of the vertebral artery (VA) typically runs through the transverse foramen of C2-C6. V2 injury may occur during anterior approaches to the cervical spine and can cause significant morbidity. We aimed to describe landmarks and microsurgical V2 repair techniques through the standard anterolateral cervical discectomy approach. METHODS: Five silicone-injected cadaveric heads (necks-C7) were dissected bilaterally. An anterolateral approach with C3-4, C4-5, and C5-6 discectomies and an ipsilateral VA injury were simulated...
June 2, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28582418/an-in-vivo-comparison-study-in-goats-for-a-novel-motion-preserving-cervical-joint-system
#6
Jie Qin, Chenguang Zhao, Dong Wang, Bo Zhao, Jun Dong, Haopeng Li, Rongxia Sang, Shuang Wang, Jiao Fu, Rangrang Kong, Xijing He
Cervical degenerative disease is one of the most common spinal disorders worldwide, especially in older people. Anterior cervical corpectomy and fusion (ACCF) is a useful method for the surgical treatment of multi-level cervical degenerative disease. Anterior cervical disc replacement (ACDR) is considered as an alternative surgical method. However, both methods have drawbacks, particularly the neck motion decrease observed after arthrodesis, and arthroplasty should only be performed on patients presenting with cervical disc disease but without any vertebral body disease...
2017: PloS One
https://www.readbyqxmd.com/read/28570783/on-the-importance-of-retaining-stresses-and-strains-in-repositioning-computational-biomechanical-models-of-the-cervical-spine
#7
Solomon Boakye-Yiadom, Duane S Cronin
Human body models are created in a specific posture and often repositioned and analyzed without retaining stresses that result from repositioning. For example, repositioning a human neck model within the physiological range of motion to a head-turned posture prior to an impact results in initial stresses within the tissues distracted from their neutral position. The aim of this study was to investigate the effect of repositioning on the subsequent kinetics, kinematics and failure modes of a lower cervical spine motion segment, to support future research at the full neck level...
June 1, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28498027/asthma-and-early-herniated-intervertebral-disc-disease
#8
Cheng-Di Chiu, Hsuan-Ju Chen, Hean-Pat Saw, Nai-Wei Yao, Hung-Rong Yen, Chia-Hung Kao
BACKGROUND: The etiology of herniated intervertebral disc (HIVD) disease in children and adolescents is multifactorial and not merely related to disc degeneration. Therefore, in the present study, we investigated the relationship between young asthma patients and the risk of early HIVD disease in a population under 30 years of age. METHODS: Data from the National Health Insurance Research Database (NHIRD) of Taiwan were used to conduct a retrospective longitudinal cohort study...
June 8, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28430387/age-related-reduction-in-the-expression-of-foxo-transcription-factors-and-correlations-with-intervertebral-disc-degeneration
#9
Oscar Alvarez-Garcia, Tokio Matsuzaki, Merissa Olmer, Koichi Masuda, Martin K Lotz
Aging is a main risk factor for intervertebral disc (IVD) degeneration, the main cause of low back pain. FOXO transcription factors are important regulators of tissue homeostasis and longevity. Here, we determined the expression pattern of FOXO in healthy and degenerated human IVD and the associations with IVD degeneration during mouse aging. FOXO expression was assessed by immunohistochemistry in normal and degenerated human IVD samples and in cervical and lumbar IVD from 6-, 12-, 24-, and 36-month-old C57BL/6J mice...
April 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28408260/evaluation-of-bioabsorbable-multiamino-acid-copolymer-nano-hydroxyapatite-calcium-sulphate-cage-in-a-goat-spine-model
#10
Chunpeng Ren, Yueming Song, Youdi Xue, Xi Yang, Chunguang Zhou
BACKGROUND: Recently, polylactide is the most popular material used to made bioabsorbable cages, but too fast degradation and osteolysis around the cage have been reported in the literature. This study evaluated the fusion effect, biomechanical stability and histological characteristics of a novel bioabsorbable multi-amino acid copolymer/nano-hydroxyapatite/calcium sulphate (MAACP/n-HA/CS) interbody cage in a goat model of anterior cervical discectomy and fusion (ACDF). METHODS: A total of 24 goats underwent C3/C4 discectomy and fusion with three groups of intervertebral implants: MAACP/n-HA/CS cage group (n = 8), titanium cage group (n = 8) and autologous tricortical iliac crest bone group (n = 8)...
April 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28402031/evaluation-of-osseous-associated-cervical-spondylomyelopathy-in-dogs-using-kinematic-magnetic-resonance-imaging
#11
Michele Provencher, Amy Habing, Sarah A Moore, Laurie Cook, Gary Phillips, Ronaldo C da Costa
Osseous-associated cervical spondylomyelopathy in dogs is characterized by both static and dynamic spinal cord compression; however, standard MRI methods only assess static compression. In humans with cervical spondylotic myelopathy, kinematic MRI is commonly used to diagnose dynamic spinal cord compressions. The purpose of this prospective, analytical study was to evaluate kinematic MRI as a method for characterizing the dynamic component of osseous-associated cervical spondylomyelopathy in dogs. We hypothesized that kinematic MRI would allow visualization of spinal cord compressions that were not identified with standard imaging...
April 12, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28378073/kinematics-of-cervical-segments-c5-c6-in-axial-rotation-before-and-after-total-disc-arthroplasty
#12
Martin Michael Wachowski, Jan Weiland, Markus Wagner, Riccardo Gezzi, Dietmar Kubein-Meesenburg, Hans Nägerl
PURPOSE: The kinematical properties of C5/C6 segments in axial rotation are evaluated before and after total disc arthroplasty (TDA) with PRESTIGE(®)-and BRYAN(®) Cervical Disc (Medtronic) under flexion/extension as parameters and compared with those of C3/C4. METHODS: Eight human segments were stimulated by triangularly varying, axially directed torque (T z(t)) under compressing static axial preloads. Using a 6D-measuring device with high resolution, the response of segmental motion was characterized by the instantaneous helical axis (IHA)...
April 4, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28377861/outpatient-anterior-cervical-discectomy-and-fusion-an-analysis-of-readmissions-from-the-new-jersey-state-ambulatory-services-database
#13
Shearwood McClelland, Peter G Passias, Thomas J Errico, R Shay Bess, Themistocles S Protopsaltis
BACKGROUND: Anterior cervical discectomy and fusion (ACDF) performed as an outpatient has become increasingly common for treating cervical spine pathology. Few reports have attempted to assess readmissions following outpatient ACDF. This study was performed to address this issue using population-based databases. METHODS: The State Ambulatory Services Database (SASD) for New Jersey (NJ) from 2003-2012 was used for analysis. Patients receiving ACDF (defined as anterior cervical fusion (ICD-0 code=81...
2017: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/28377542/myelopathy-associated-with-age-related-cervical-disc-herniation-a-retrospective-review-of-magnetic-resonance-images
#14
Nosaiba Tawfik Al-Ryalat, Saif Aldeen Saleh, Walid Sulaiman Mahafza, Osama Ahmad Samara, Abdee Tawfiq Ryalat, Azmy Mohammad Al-Hadidy
BACKGROUND: Cervical intervertebral disc herniation can lead to myelopathy. Aging is an established variable related to spondylotic myelopathy. Studying this association will help in controlling the increase in spondylotic myelopathy with age. OBJECTIVES: To study the association between cervical disc level, its direction, and the frequency of my-elopathy with age, and to assess the epidemiology of age-related cervical disc herniation and myelopathy. DESIGN: Retrospective review of magnetic resonance (MR) images...
March 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28368985/prediction-of-cervical-spinal-joint-loading-and-secondary-motion-using-a-musculoskeletal-multibody-dynamics-model-via-force-dependent-kinematics-approach
#15
Hao Diao, Hua Xin, Jun Dong, Xijing He, Dichen Li, Zhongmin Jin
STUDY DESIGN: A cervical spine biomechanical investigation using multibody dynamics. OBJECTIVE: To develop a comprehensive cervical spine multibody dynamics model incorporated with the force-dependent kinematics (FDK) approach, and to study the influence of soft tissue deformation on the joint loading prediction. SUMMARY OF BACKGROUND DATA: Musculoskeletal multibody dynamics models have been widely used to analyze joint loading. Current cervical spine musculoskeletal models, however, neglect the joint internal motion caused by soft tissue deformation...
March 31, 2017: Spine
https://www.readbyqxmd.com/read/28346006/magnetic-resonance-imaging-susceptibility-artifacts-in-the-cervical-vertebrae-and-spinal-cord-related-to-monocortical-screw-polymethylmethacrylate-implants-in-canine-cadavers
#16
Brian G Jones, Geoffrey T Fosgate, Eric M Green, Amy M Habing, Bianca F Hettlich
OBJECTIVE To characterize and compare MRI susceptibility artifacts related to titanium and stainless steel monocortical screws in the cervical vertebrae and spinal cord of canine cadavers. SAMPLE 12 canine cadavers. PROCEDURES Cervical vertebrae (C4 and C5) were surgically stabilized with titanium or stainless steel monocortical screws and polymethylmethacrylate. Routine T1-weighted, T2-weighted, and short tau inversion recovery sequences were performed at 3.0 T. Magnetic susceptibility artifacts in 20 regions of interest (ROIs) across 4 contiguous vertebrae (C3 through C6) were scored by use of an established scoring system...
April 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28340590/comparison-of-angle-shape-and-position-of-articular-processes-in-dobermans-and-great-danes-with-and-without-cervical-spondylomyelopathy
#17
Marília de Albuquerque Bonelli, Ronaldo Casimiro da Costa, Paula Martin-Vaquero, Carolina Gonçalves Dias Lima
BACKGROUND: Cervical spondylomyelopathy (CSM), also known as wobbler syndrome, affects mainly large and giant-breed dogs, causing compression of the cervical spinal cord and/or nerve roots. Structural and dynamic components seem to play a role in the development of CSM; however, pathogenesis is not yet fully understood. Physiologic and pathologic movements of the cervical spine depend on the morphology and morphometry of articular processes, as well as on intervertebral discs and vertebral column ligaments...
March 24, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28334358/ranges-of-cervical-intervertebral-disc-deformation-during-an-in-vivo-dynamic-flexion-extension-of-the-neck
#18
Yan Yu, Haiqing Mao, Jing-Sheng Li, Tsung-Yuan Tsai, Liming Cheng, Kirkham B Wood, Guoan Li, Thomas D Cha
While abnormal loading is widely believed to cause cervical spine disc diseases, in vivo cervical disc deformation during dynamic neck motion has not been well delineated. This study investigated the range of cervical disc deformation during an in vivo functional flexion-extension of the neck. Ten asymptomatic human subjects were tested using a combined dual fluoroscopic imaging system (DFIS) and magnetic resonance imaging (MRI)-based three-dimensional (3D) modeling technique. Overall disc deformation was determined using the changes of the space geometry between upper and lower endplates of each intervertebral segment (C3/4, C4/5, C5/6, and C6/7)...
June 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28326638/intervertebral-disc-calcification-with-ossification-of-the-posterior-longitudinal-ligament
#19
Kaori Mizukawa, Takako Kobayashi, Nobuharu Yamada, Takahisa Hirota
A 6-year-old girl presented to hospital with a 4 day history of increasing neck pain. White blood cell count was normal with slightly raised C-reactive protein. The patient had a limited range of neck movement, and experienced enhanced pain with neck extension. X-ray and cervical computed tomography (CT) confirmed the diagnosis of cervical intervertebral disc calcification (IDC) and IDC with ossification of the posterior longitudinal ligament (OPLL), respectively. The symptoms improved after approximately 1 week following rest and oral acetaminophen...
May 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28321567/adjacent-segment-pathology-natural-history-or-effect-of-anterior-cervical-discectomy-and-fusion-a-10-year-follow-up-radiological-multicenter-study-using-an-evaluation-scale-of-the-ageing-spine
#20
Alessandro Pesce, Venceslao Wierzbicki, Emanuele Piccione, Alessandro Frati, Antonino Raco, Riccardo Caruso
PURPOSE: Aim of this study is to compare late degenerative MRI changes in a subset of patients operated on with ACDF to a second subset of patients presenting indication to ACDF but never operated on. METHODS: Patients from both subgroups received surgical indication according to the same criteria. Both subgroups underwent a cervical spine MRI in 2004-2005 and 10 years later in 2015. These MRI scans were retrospectively evaluated with a cervical spine ageing scale...
March 20, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
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