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Reconstruction of the. Spine

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https://www.readbyqxmd.com/read/29138688/effect-on-chest-deformation-of-simultaneous-correction-of-pectus-excavatum-with-scoliosis
#1
Jin-Duo Ye, Guang-Pu Lu, Jing-Jing Feng, Wei-Hong Zhong
Objective: This paper is to understand the effect of simultaneous correction of pectus excavatum with scoliosis and to provide some useful information for clinical orthopedic surgery design. Methods: The method of a three-dimensional reconstruction has been used to the reconstruction of the chest model of pectus excavatum with scoliosis, and the numerical stimulation has been conducted to the process of minimally invasive correction. Three kinds of correction methods have been considered in the numerical simulation, stretch spine, stretch spine and minimally invasive correction at the same time, and release stretch spine after stretch spine and minimally invasive correction of pectus excavatum at the same time...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29130656/-design-of-minimal-invasive-screw-on-posterior-pelvis-ring-and-pelvic-finite-element-analysis
#2
Fan Tang, Li Min, Yan-Ling Wang, Bo Qu, Yong Zhou, Yi Luo, Wen-Li Zhang, Rui Shi, Hong Duan, Chong-Qi Tu
OBJECTIVE: To design minimal invasive screw on posterior pelvic ring and perform threedimensional finite element analysis based on a pelvis finite element model. METHODS: We measured the pelvic anatomical data of 20 healthy volunteers and identified potential designs for minimal invasive screw on posterior pelvic ring. A finite element model of pelvis was then established. Threedimensional finite element analyses were performed under static and dynamic mechanical loading,respectively...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29115038/ultramorphological-and-molecular-characteristics-of-the-larval-stages-of-the-horse-nasal-myiasis-fly-rhinoestrus-sp-diptera-oestridae-from-mongolian-horse-in-china
#3
Junbin Dong, Haiquan Bao, Lai Mang
Rhinoestrus sp. (Diptera: Oestridae) is an economically important parasite that can cause severe nasal myiasis in equids and can also affect humans. The ultrastructure of all Rhinoestrus sp. larval instars from Mongolian horse was examined by light and scanning electron microscopy to characterize the features of Rhinoestrus. The structure of the anterior region, posterior region, and the spines of the third segment was analyzed for 10 specimens in each larval stage. Additionally, 34 third-instar (L3) larvae of Rhinoestrus sp...
November 8, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29110049/diagnostic-accuracy-of-low-dose-versus-ultra-low-dose-ct-for-lumbar-disc-disease-and-facet-joint-osteoarthritis-in-patients-with-low-back-pain-with-mri-correlation
#4
Sun Hwa Lee, Seong Jong Yun, Hyeon Hwan Jo, Dong Hyeon Kim, Jae Gwang Song, Yong Sung Park
OBJECTIVE: To compare the image quality, radiation dose, and diagnostic performance between low-dose (LD) and ultra-low-dose (ULD) lumbar-spine (L-spine) CT with iterative reconstruction (IR) for patients with chronic low back pain (LBP). METHODS: In total, 260 patients with chronic LBP who underwent L-spine CT between November 2015 and September 2016 were prospectively enrolled. Of these, 143 underwent LD-CT with IR and 117 underwent ULD-CT with IR. The patients were divided according to their body mass index (BMI) into BMI1 (<22...
November 6, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29095412/cervical-sagittal-range-of-motion-as-a-predictor-of-symptom-severity-in-cervical-spondylotic-myelopathy
#5
Kristen J Nicholson, Paul W Millhouse, Emily Pflug, Barrett Woods, Gregory D Schroeder, D Greg Anderson, Alan S Hilibrand, Christopher K Kepler, Mark F Kurd, Jeffrey A Rihn, Alexander Vaccaro, Kris E Radcliff
STUDY DESIGN: Retrospective review of radiographic data and functional outcomes. OBJECTIVE: Evaluate whether myelopathy symptom severity upon presentation corresponds to sagittal plane alignment or non-myelopathy symptoms, such as pain, in patients with cervical spondylotic myelopathy (CSM). SUMMARY OF BACKGROUND DATA: Cervical sagittal balance is an important parameter in the outcome of surgical reconstruction. However, the effect of sagittal alignment on symptom severity in patients who have not undergone spine surgery is not well defined...
October 31, 2017: Spine
https://www.readbyqxmd.com/read/29089670/complications-exclusive-to-long-strut-grafts-used-following-multilevel-cervical-corpectomy-utilization-of-advanced-imaging-techniques
#6
Pushpa B Thippeswamy, Sunitha P Kumaran, Vinay Hegde, Sanjaya Viswamitra
When surgical decompression of cervical spine is considered, multilevel cervical corpectomy with long strut grafts is the preferred treatment. This procedure is used in a variety of pathologies including degenerative disease, tumors, trauma and infection. Corpectomy with interbody grafting helps in adequate spinal canal and neural decompression compared to multilevel discectomy, which could be difficult as well as inadequate. Fibular/iliac strut grafts are used for reconstruction along with a stabilizing hardware in this procedure...
July 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/29057346/corpectomy-and-expandable-cage-replacement-versus-third-generation-percutaneous-augmentation-system-in-case-of-vertebra-plana-rationale-and-recommendations
#7
Daniele Vanni, Andrea Pantalone, Vincenzo Magliani, Vincenzo Salini, Pedro Berjano
BACKGROUND: To evaluate the role of third generation percutaneous vertebral augmentation systems (Spine Jack(®)) as alternative to the corpectomies and expandable cages replacement (X-Core(®) Adjustable VBR System) in the treatment of vertebra plana (VP) as complication of the osteoporosis vertebral fracture (OVF). METHODS: Spine Jack(®) is a new device for mechanical kyphoplasty (MK). It is a titanium implant designed to restore the height of the vertebral body in OVF, primary or secondary bone tumors, or traumatic fractures...
September 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29052751/-prevention-of-infections-due-to-musculoskeletal-allografts
#8
REVIEW
A Pruß
Transplantation of musculoskeletal tissues is widely used in the treatment of extensive defects of the musculoskeletal system, especially in orthopedics for exchange of prostheses, surgical interventions on the spine and in traumatology for reconstruction after extensive tumor resections. A danger after transplantation is the potential transmission of clinically relevant pathogens. Tissue banks have therefore established a safety level approach for musculoskeletal tissue transplants, which includes donor selection, laboratory testing, tissue procurement, tissue processing, tissue storage and quality assurance...
October 20, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29050958/metal-artefact-reduction-for-accurate-tumour-delineation-in-radiotherapy
#9
David Gergely Kovacs, Laura A Rechner, Ane L Appelt, Anne K Berthelsen, Junia C Costa, Jeppe Friborg, Gitte F Persson, Jens Peter Bangsgaard, Lena Specht, Marianne C Aznar
BACKGROUND AND PURPOSE: Two techniques for metal artefact reduction for computed tomography were studied in order to identify their impact on tumour delineation in radiotherapy. MATERIALS AND METHODS: Using specially designed phantoms containing metal implants (dental, spine and hip) as well as patient images, we investigated the impact of two methods for metal artefact reduction on (A) the size and severity of metal artefacts and the accuracy of Hounsfield Unit (HU) representation, (B) the visual impact of metal artefacts on image quality and (C) delineation accuracy...
October 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29049254/one-stage-posterior-approaches-for-treatment-of-thoracic-spinal-infection-transforaminal-and-costotransversectomy-compared-with-anterior-approach-with-posterior-instrumentation
#10
Fu-Cheng Kao, Tsung-Ting Tsai, Chi-Chien Niu, Po-Liang Lai, Lih-Huei Chen, Wen-Jer Chen
Treating thoracic infective spondylodiscitis with anterior surgical approaches carry a relatively high risk of perioperative and postoperative complications. Posterior approaches have been reported to result in lower complication rates than anterior procedures, but more evidence is needed to demonstrate the safety and efficacy of 1-stage posterior approaches for treating infectious thoracic spondylodiscitis.Preoperative and postoperative clinical data, of 18 patients who underwent 2 types of 1-stage posterior procedures, costotransversectomy and transforaminal thoracic interbody debridement and fusion and 7 patients who underwent anterior debridement and reconstruction with posterior instrumentation, were retrospectively assessed...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29023477/possible-cases-of-leprosy-from-the-late-copper-age-3780-3650-cal-bc-in-hungary
#11
Kitti Köhler, Antónia Marcsik, Péter Zádori, Gergely Biro, Tamás Szeniczey, Szilvia Fábián, Gábor Serlegi, Tibor Marton, Helen D Donoghue, Tamás Hajdu
At the Abony-Turjányos dűlő site, located in Central Hungary, a rescue excavation was carried out. More than 400 features were excavated and dated to the Protoboleráz horizon, at the beginning of the Late Copper Age in the Carpathian Basin, between 3780-3650 cal BC. Besides the domestic and economic units, there were two special areas, with nine-nine pits that differed from the other archaeological features of the site. In the northern pit group seven pits contained human remains belonging to 48 individuals...
2017: PloS One
https://www.readbyqxmd.com/read/29018961/accuracy-of-a-patient-specific-template-for-pedicle-screw-placement-compared-with-a-conventional-method-a-meta-analysis
#12
Yong Fan, Jin-Peng Du, Qi-Ning Wu, Jia-Nan Zhang, Ding-Jun Hao
INTRODUCTION: Accurate placement of pedicle screws in spine surgery is a challenge for surgeons. Patient-specific template techniques have the potential for improving the accuracy of screw placement. The target of this analysis was to investigate differences in terms of accuracy of pedicle screw insertion between patient-specific template assistance and the conventional free-hand method for reconstruction of spinal stability. MATERIALS: The Cochrane Library, Ovid, Web of Science, PubMed, EMBASE and CNKI database were searched until February 2017 for a systematic review, and several comparative studies were screened for comparisons of accuracies of pedicle screw insertion with patient-specific assistance and conventional methods...
October 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29016433/under-correction-of-sagittal-deformities-based-on-age-adjusted-alignment-thresholds-leads-to-worse-hrqol-while-over-correction-provides-no-additional-benefit
#13
Justin K Scheer, Renaud Lafage, Frank J Schwab, Barthelemy Liabaud, Justin S Smith, Gregory M Mundis, Richard Hostin, Christopher I Shaffrey, Douglas C Burton, Robert A Hart, Han Jo Kim, Shay Bess, Munish Gupta, Virginie Lafage, Christopher P Ames
STUDY DESIGN: Retrospective review of prospectively-collected database. OBJECTIVE: This study aims to compare 2-year clinical outcomes of patients who underwent surgical reconstructions based on their achievement to age-adjusted alignment ideals. SUMMARY OF BACKGROUND DATA: Recent research in sagittal plane has proposed age-adjusted alignment thresholds. However, the impact of these thresholds on post-operative HRQL is yet to be investigated...
October 9, 2017: Spine
https://www.readbyqxmd.com/read/28993889/recurrent-primary-osseous-hemangiopericytoma-in-the-thoracic-spine-a-case-report-and-literature-review
#14
Takahiro Onoki, Haruo Kanno, Toshimi Aizawa, Ko Hashimoto, Eiji Itoi, Hiroshi Ozawa
PURPOSE: Primary osseous hemangiopericytoma (HPC) of the spine is exceedingly rare. HPC has malignant potential and has the capacity for metastasis and local recurrence. We herein present the first case of recurrent primary osseous HPC in the thoracic spine that was successfully treated by total spondylectomy at three vertebral levels and spinal reconstruction. METHODS: We performed a two-stage operation for recurrent HPC using anterior and posterior approaches at the T5-T7 vertebrae...
October 9, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28984735/variability-in-assessing-spinopelvic-parameters-with-lumbosacral-transitional-vertebrae-inter-and-intra-observer-reliability-among-spine-surgeons
#15
Amrit S Khalsa, Gregory M Mundis, Mitsuru Yagi, Richard Fessler, Shay Bess, Naobumi Hosogane, Paul Park, Khoi Than, Alan Daniels, Justin Iorio, Justin Ledesma, Stacie Tran, Robert K Eastlack
STUDY DESIGN: Prospectively-collected survey study OBJECTIVE.: To determine the consistency with which spino-pelvic parameters (SPP) are determined in patients with lumbosacral transitional vertebrae (LSTV). SUMMARY OF BACKGROUND DATA: The incidence of LSTV in the general population is as high as 35.6%. The often fixed nature of LSTV relative to the pelvis, but lumbar-type appearance, may lead to differential use of the S1 endplate when performing SPP assessment...
October 3, 2017: Spine
https://www.readbyqxmd.com/read/28976633/imaging-neuronal-structure-dynamics-using-two-photon-super-resolution-patterned-excitation-reconstruction-super-microscopy
#16
Ben E Urban, Lei Xiao, Biqin Dong, Siyu Chen, Yevgenia Kozorovitskiy, Hao F Zhang
Visualizing fine neuronal structures deep inside strong light-scattering brain tissue remains a challenge in neuroscience. Recent nanoscopy techniques have reached the necessary resolution, but often suffer from limited imaging depth, long imaging time, or high light fluence requirements. Here, we present two-photon Super-resolution Patterned Excitation Reconstruction (2P-SuPER) microscopy for three-dimensional imaging of dendritic spine dynamics at a maximum demonstrated imaging depth of 130 μm in living brain tissue with approximately 100 nm spatial resolution...
October 4, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28968773/quantitative-3d-ultrastructure-of-thalamocortical-synapses-from-the-lemniscal-ventral-posteromedial-nucleus-in-mouse-barrel-cortex
#17
Javier Rodriguez-Moreno, Astrid Rollenhagen, Jaime Arlandis, Andrea Santuy, Angel Merchan-Pérez, Javier DeFelipe, Joachim H R Lübke, Francisco Clasca
Thalamocortical synapses from "lemniscal" neurons of the dorsomedial portion of the rodent ventral posteromedial nucleus (VPMdm) are able to induce with remarkable efficacy, despite their relative low numbers, the firing of primary somatosensory cortex (S1) layer 4 (L4) neurons. To which extent this high efficacy depends on structural synaptic features remains unclear. Using both serial transmission (TEM) and focused ion beam milling scanning electron microscopy (FIB/SEM), we 3D-reconstructed and quantitatively analyzed anterogradely labeled VPMdm axons in L4 of adult mouse S1...
July 28, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28966814/biomechanical-study-of-rod-stress-after-pedicle-subtraction-osteotomy-versus-anterior-column-reconstruction-a-finite-element-study
#18
Jacob Januszewski, Joshua M Beckman, Jeffrey E Harris, Alexander W Turner, Chun Po Yen, Juan S Uribe
BACKGROUND: In an effort to minimize rod fractures and nonunion in pedicle subtraction osteotomy (PSO) constructs, surgeons have adopted multirod constructs and interbody cages. Anterior column realignment (ACR) with posterior column osteotomies is a minimally invasive alternative to PSO in sagittal balance correction, however, there is a paucity of evidence with respect to rod survival. METHODS: Three-dimensional (3D) finite-element-model of a T12-sacrum spine segment was used to compare a 25° PSO at L3 and an ACR with a posterior column osteotomy and 30° hyperlordotic interbody cage at L3-4...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28962908/should-long-segment-cervical-fusions-be-routinely-carried-into-the-thoracic-spine-multi-center-analysis
#19
Eeric Truumees, Devender Singh, Matthew J Geck, John K Stokes
BACKGROUND CONTEXT: While recommendations for caudal "end level" in posterior cervical reconstruction remain highly variable, the benefits of routine extension of posterior cervical fusions into the thoracic spine remain unclear. PURPOSE: Compare clinical and radiographic outcomes in patients in whom posterior fusions ended in the cervical spine versus those in whom the fusion was extended into the thoracic spine. STUDY DESIGN/SETTING: Multi-center retrospective analysis of prospectively followed patients...
September 26, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28961805/two-stage-en-bloc-resection-of-multilevel-cervical-chordomas-with-vertebral-artery-preservation-operative-technique
#20
Xingwen Wang, Eldan Eichbaum, Fengzeng Jian, Dean Chou
BACKGROUND: En bloc excision of cervical chordoma is a technically complex procedure, due to the involvement and closeness of the tumor to the spinal cord, cervical nerve roots, and vertebral arteries. Studies have previously shown that en bloc excision of chordomas with negative margins improves local control and prolongs disease-free survival compared with intralesional excision. True en bloc spondylectomy in the cervical spine is not feasible since bilateral vertebral artery sacrifice is not possible...
August 9, 2017: Operative Neurosurgery (Hagerstown, Md.)
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