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Reconstruction of the. Spine

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https://www.readbyqxmd.com/read/29788958/langerhans-cell-histiocytosis-at-l5-vertebra-treated-with-en-bloc-vertebral-resection-a-case-report
#1
Lunhao Chen, Zhong Chen, Yue Wang
BACKGROUND: Langerhans cell histiocytosis (LCH) in adult lumbar spine is extremely rare, and optimal treatments remain unclear. In literature, only a few cases of lumbar spine LCH were treated using surgery but en bloc vertebral resection has not been used. CASE PRESENTATION: A 50-year-old man presented with unbearable radiating pain at his right leg. Radiological studies revealed a solitary osteolytic lesion, which was moderately enhanced on contrast MR imaging and hyper-metabolic on PET/CT, at the right L5 vertebral body and arch...
May 22, 2018: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29787380/an-image-reconstruction-method-with-locally-adaptive-gating-scheme-for-pet-data
#2
Jizhe Wang, Yun Dong, Hongdi Li, Tao Feng
In conventional gating approaches for PET, a single number of gates is predetermined for the whole field of view (FOV) regardless of spatially variant motion blurring effects, which compromises image quality by under-gating regions of large motion and over-gating static regions. To achieve the best resolution-noise trade-off for the whole FOV, we proposed a new approach that incorporates spatially variant number of gates into gated image reconstruction. The first step is to estimate motion amplitude of each spatial location...
May 22, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29775162/validation-of-prone-intraoperative-measurements-of-global-spinal-alignment
#3
Max Vaynrub, Brandon P Hirsch, Jared Tishelman, Dennis Vasquez-Montes, Aaron J Buckland, Thomas J Errico, Themistocles S Protopsaltis
OBJECTIVE Verifying the adequacy of surgical correction of adult spinal sagittal deformity (SSD) leads to improved postoperative alignment and clinical outcomes. Traditionally, surgeons relied on intraoperative measurements of lumbar lordosis (LL) correction. However, T-1 pelvic angle (TPA) and its component angles more reliably predict postoperative alignment. While TPA is readily measured on standing radiographs, intraoperative radiographs offer poor resolution of the bicoxofemoral axis. A method to recreate this radiographic landmark by extrapolating preoperative measurements has been described...
May 18, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29772857/-posterior-spinal-canal-decompression-with-screw-fixation-and-reconstruction-of-three-vertebral-column-for-thoracolumbar-burst-fractures-complicated-with-nerve-injury
#4
Li-Yong Wu, Xue-Mei Huang, Yue Wang, Zhao-Bo Yang, Sheng-Hui Su, Chun Wang
OBJECTIVE: To explore the feasibility and clinical effect of posterior spinal canal decompression with pedicle screw fixation and reconstruction of anterior and middle vertebral column for thoracolumbar burst fractures complicated with nerve injury. METHODS: A total of 36 patients with thoracolumbar burst fractures treated from March 2011 to April 2016 were enrolled in the retrospective study. There were 20 males and 16 females, aged from 21 to 52 years old with an average of 37...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29755241/preoperative-manual-on-table-traction-for-the-reduction-of-thoracolumbar-burst-fractures-a-technical-note
#5
Petrini Carlo, Cacciola Francesco
Thoracolumbar burst fractures can frequently be treated either conservatively or surgically. Surgery is generally preferred when safe early mobilization with a reconstructed sagittal alignment is wanted without any external restraint. Various dedicated instruments are available on the market to perform reduction and distraction maneuvers on the spine intraoperatively to restore normal sagittal alignment after a fracture. The authors describe a simple but effective technique of proper patient positioning and preoperative on-table-traction that can effectively aid in the restoration of alignment and performance of surgery even with the most basic instrumentation...
January 2018: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29755233/cervical-lift-up-laminoplasty-with-titanium-basket-plates-after-resection-of-intradural-tumor
#6
Keisuke Shirosaka, Kentaro Naito, Toru Yamagata, Masaki Yoshimura, Kenji Ohata, Toshihiro Takami
Background: Performing cervical laminoplasty after wide laminectomy may be technically demanding. The unique technique of cervical lift-up laminoplasty using titanium basket plates was applied for the reconstruction of cervical laminae after wide laminectomy for the resection of intradural tumors. Materials and Methods: This technical study included 14 cases that could be followed periodically for at least 6 months after surgery. Participants were 8 male and 6 female, with a mean age of 41...
January 2018: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#7
M Bourgain, S Hybois, P Thoreux, O Rouillon, P Rouch, C Sauret
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29746278/computed-tomographic-angiography-used-for-localization-of-the-cutaneous-perforators-and-selection-of-anterolateral-thigh-flap-bail-out-branches
#8
Anna K Steve, Colin P White, Ali Alkhawaji, Thomas E J Hayakawa, Edward W Buchel, Steven F Morris
BACKGROUND: The purpose of this study was to evaluate the territory supplied by the lateral circumflex femoral artery for the consistency of a proximal perforator that could be used as an alternative pedicle for the anterolateral thigh flap if a tedious intramuscular course is encountered during elevation of the perforator used to develop the initial surgical plan. It is hypothesized that a consistent "bail-out" perforator supplying the proximal thigh would facilitate a simpler anterolateral thigh flap harvest, with minimal modification to flap design...
April 30, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29735128/the-relationship-between-apical-vertebral-rotation-and-truncal-rotation-in-adolescent-idiopathic-scoliosis-using-3d-reconstructions
#9
Pawel P Jankowski, Burt Yaszay, Krishna R Cidambi, Carrie E Bartley, Tracey P Bastrom, Peter O Newton
STUDY DESIGN: Retrospective review of prospective data. OBJECTIVES: To evaluate the relationship between absolute apical vertebral rotation (AVR) evaluated with upright 3D imaging and angle of trunk rotation (ATR) before and after surgery for thoracic and lumbar curves in adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: New imaging technology allows for improved radiographic assessment of the degree of AVR pre- and postoperatively through 3D spine models created from biplanar, simultaneous spine radiographs...
May 2018: Spine Deformity
https://www.readbyqxmd.com/read/29731280/-sandwich-deformity-in-klippel-feil-syndrome-a-full-spectrum-presentation-of-associated-craniovertebral-junction-abnormalities
#10
Yinglun Tian, Dongwei Fan, Nanfang Xu, Shenglin Wang
Klippel-Feil syndrome (KFS) is defined as congenital fusion of two or more cervical vertebrae resulting from a segmentation failure in the developing spine. According to Samartzis et al., the most commonly fused segments are found at C2/3 (74.1%) and C6/7 (70.4%). In patients with C2/3 fusion, especially when there is additional C1 occipitalization, several secondary anomalies including atlantoaxial dislocation (AAD), basilar invagination (BI), Chiari malformation, and syringomyelia can be identified. In this report, we present a case of a 12-year-old patient with C2/3 and occipitalization and a "Full-Spectrum" presentation of associated CVJ abnormalities including C0/1 fusion, AAD, BI, Chiari malformation, syringomyelia, myelopathy and cranial neuropathy received neurological decompression of the cervico-medullary junction by posterior reduction of the AAD and reconstruction of her CVJ using an unconventional hybrid construct due to a high-riding right vertebral artery in C2...
May 3, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29730723/characteristic-morphological-patterns-within-adolescent-idiopathic-scoliosis-may-be-explained-by-mechanical-loading
#11
Benedikt Schlager, Florian Krump, Julius Boettinger, Frank Niemeyer, Michael Ruf, Sebastian Kleiner, Meinrad Beer, Hans-Joachim Wilke
PURPOSE: Adolescent idiopathic scoliosis (AIS) is a three-dimensional deformity of the spine which exhibits morphological changes during growth. The goal of this study was to identify morphological patterns that could be explained by different loading patterns for AIS. METHODS: Computed tomography data of 21 patients with diagnosed AIS and 48 patients without any visual spinal abnormalities were collected prospectively. The bony structures were reconstructed, and landmarks were placed on characteristic morphological points on the spine...
May 5, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29730457/anterior-posterior-length-discrepancy-of-the-spinal-column-in-adolescent-idiopathic-scoliosis-a-3d-ct-study
#12
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Steve C N Hui, Max A Viergever, Winnie C W Chu, Jack C Y Cheng, René M Castelein
BACKGROUND CONTEXT: One of the characteristics of reported observations in adolescent idiopathic scoliosis (AIS) is that the thoracic spine is longer anteriorly than posteriorly, more pronounced around the apex than the transitional zones. This reversal of the normal kyphotic anatomy of the thoracic spine is related to questions of etiopathogenesis of AIS. The changes in the anatomy of the anterior column have been described rather in detail, however, the role of the posterior spinal column and the laminae has so far not been elucidated...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29730456/outcome-and-safety-analysis-of-3d-printed-patient-specific-pedicle-screw-jigs-for-complex-spinal-deformities-a-comparative-study
#13
Bhavuk Garg, Manish Gupta, Menaka Singh, Dinesh Kalyanasundaram
BACKGROUND CONTEXT: Spinal deformities are very challenging to treat and have a great risk of neurological complications due to hardware placement during corrective surgery. Various techniques have been introduced to ensure safe and accurate placement of pedicle screws. Patient-specific screw guides with pre-drawn and pre-validated trajectory seems to be an attractive option. PURPOSE: We have focused on developing 3D printing technique for complex spinal deformities in India...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29727335/spinopelvic-fixation
#14
Sean M Esmende, Kalpit N Shah, Alan H Daniels
Fixation at the lumbosacral junction continues to be a challenge for spine surgeons despite advances in spinal instrumentation techniques. The poor bone quality of the sacrum, the complex regional anatomy, and the tremendous biomechanical forces at the lumbosacral junction contribute to the high rates of instrumentation-related complications. Although many spinopelvic fixation techniques have been reported, only a few are still widely used because of the high complication rates associated with previous techniques...
June 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29719912/vascularized-bone-grafting-for-reconstruction-of-oncologic-defects-in-the-spine-a-systematic-review-and-pooled-analysis-of-the-literature
#15
Rachel Pedreira, Charalampos Siotos, Brian H Cho, Stella M Seal, Deepa Bhat, Hannah M Carl, Michelle Seu, J P Wolinksy, Justin M Sacks
BACKGROUND:  Resection of primary spinal tumors requires reconstruction for restoration of spinal column stability. Traditionally, some combination of bone grafting and instrumentation is implemented. However, delayed healing environments are associated with pseudoarthrodesis and failure. Implementation of vascularized bone grafting (VBG) to complement hardware may present a solution. We evaluated the use of VBG in oncologic spinal reconstruction via systematic review and pooled analysis of literature...
May 2, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29713408/vertebral-lateral-notch-as-optimal-entry-point-for-lateral-mass-screwing-using-modified-roy-camille-technique
#16
Norio Yamamoto, Hirofumi Kosaka, Kosaku Higashino, Masatoshi Morimoto, Kazuta Yamashita, Fumitake Tezuka, Fumio Hayashi, Yoichiro Takata, Toshinori Sakai, Akihiro Nagamachi, Koichi Sairyo
Study Design: Retrospective study of 37 consecutive female patients with cervical spondylotic myelopathy who underwent reconstructed computed tomography (CT) scanning of the cervical spine. Purpose: The purpose of this study was to investigate whether the vertebral lateral notch of the cervical spine is an effective landmark to determine the entry point for lateral mass screwing. A modified Roy-Camille technique was used to determine the entry point associated with the lateral notch of the cervical spine...
April 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/29693200/preliminary-experience-with-spineeos-a-new-software-for-3d-planning-in-ais-surgery
#17
Emmanuelle Ferrero, Keyvan Mazda, Anne-Laure Simon, Brice Ilharreborde
PURPOSE: Preoperative planning of scoliosis surgery is essential in the effective treatment of spine pathology. Thus, precontoured rods have been recently developed to avoid iatrogenic sagittal misalignment and rod breakage. Some specific issues exist in adolescent idiopathic scoliosis (AIS), such as a less distal lower instrumented level, a great variability in the location of inflection point (transition from lumbar lordosis to thoracic kyphosis), and sagittal correction is limited by both bone-implant interface...
April 24, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29688271/evolutionary-diversification-of-the-african-achyranthoid-clade-amaranthaceae-in-the-context-of-sterile-flower-evolution-and-epizoochory
#18
Vanessa Di Vincenzo, Michael Gruenstaeudl, Lars Nauheimer, Melaku Wondafrash, Peris Kamau, Sebsebe Demissew, Thomas Borsch
Background and Aims: Many African genera of the Amaranthaceae exhibit unique inflorescences that include sterile flowers modified to hooks or spines. Considering that the abundance of large terrestrial herbivores increased on the African continent with the expansion of grassland and savannah ecosystems, modified sterile flowers could have been an innovation that boosted the diversification of an African achyranthoid clade of Amaranthaceae, with large animals serving dispersal. Methods: We generated an extensively sampled phylogeny comprising 26 of the 31 achyranthoid genera as well as representatives of all other lineages of Amaranthaceae...
April 24, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29687237/3d-reconstruction-of-scoliotic-spines-from-stereoradiography-and-depth-imaging
#19
Benjamin Groisser, Ron Kimmel, Guy Feldman, Nimrod Rozen, Alon Wolf
Spine shape can be reconstructed from stereoradiography, but often requires specialized infrastructure or fails to account for subject posture. In this paper a protocol is presented for stereo reconstructions that integrates surface recordings with radiography and naturally accounts for variations in patient posture. Low cost depth cameras are added to an existing radiographic system to capture patient pose. A statistical model of human body shape is learned from public datasets and registered to depth scans, providing 3D correspondence across images for stereo reconstruction of radiographic landmarks...
April 23, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29677654/diagnosis-of-lumbar-spinal-fractures-in-emergency-department-low-dose-versus-standard-dose-ct-using-model-based-iterative-reconstruction
#20
Sun Hwa Lee, Seong Jong Yun, Hyeon Hwan Jo, Jae Gwang Song
PURPOSE: To compared the diagnostic performance of low-dose (LD) lumbar-spine (L-spine) CT with that of standard-dose (SD) L-spine CT. METHODS: Patients who underwent SD (n = 76) or LD (n = 68) L-spine CT using model-based iterative reconstruction were included. Two reviewers independently analyzed 10 anatomical regions on both CT scans. Also, suggested treatment decision between both CT scans was compared. RESULTS: LD L-spine CT showed an excellent diagnostic accuracy (98...
April 14, 2018: Clinical Imaging
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