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Reconstruction of the. Spine

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https://www.readbyqxmd.com/read/27927501/morphometric-analysis-of-the-thoracic-intervertebral-foramen-osseous-anatomy-in-adolescent-idiopathic-scoliosis-using-low-dose-computed-tomography
#1
Thorbjorn J Loch-Wilkinson, Maree T Izatt, Robert D Labrom, Geoffrey N Askin, Mark J Pearcy, Clayton J Adam
PURPOSE: The dimensions of the thoracic intervertebral foramen in adolescent idiopathic scoliosis (AIS) have not previously been quantified. Better understanding of the dimensions of the foramen may be useful in surgical planning. This study describes a reproducible method for measurement of the thoracic foramen in AIS using computed tomography (CT). METHODS: In 23 preoperative female patients with Lenke 1 type AIS with right-side convexity major curves confined to the thoracic spine the foraminal height (FH), foraminal width (FW), pedicle to superior articular process distance (P-SAP), and cross-sectional foraminal area (FA) were measured using multiplanar reconstructed CT...
May 2016: Spine Deformity
https://www.readbyqxmd.com/read/27921155/comparison-of-two-and-three-dimensional-measurement-of-the-cobb-angle-in-scoliosis
#2
Ricarda Lechner, David Putzer, Dietmar Dammerer, Michael Liebensteiner, Christian Bach, Martin Thaler
PURPOSE: The Cobb angle as an objective measure is used to determine the progression of deformity, and is the basis in the planning of conservative and surgical treatment. However, studies have shown that the Cobb angle has two limitations: an inter- and intraobserver variability of the measurement is approximately 3-5 degrees, and high variability regarding the definition of the end vertebra. Scoliosis is a three-dimensional (3D) pathology, and 3D pathologies cannot be completely assessed by two-dimensional (2D) methods, like 2D radiography...
December 5, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27913838/isolated-transverse-process-fractures-insignificant-injury-or-marker-of-complex-injury-pattern
#3
G Lombardo, P Petrone, K Prabhakaran, C P Marini
INTRODUCTION: This study investigates the incidence of isolated transverse process fractures (ITPFx) amongst vertebral fractures in trauma patients, and specific-associated injury patterns present in patients with ITPFx. MATERIALS AND METHODS: A retrospective, 4-year review of our Level 1 Trauma Center registry was performed. Patients with blunt spinal column fractures were identified. Data collected included patient demographics, Injury Severity Score (ISS), type of imaging obtained, and concomitant injuries, including rib and pelvic fractures, liver, spleen, and kidney injury (SOI)...
December 2, 2016: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/27909098/reversible-disruption-of-neuronal-mitochondria-by-ischemic-and-traumatic-injury-revealed-by-quantitative-two-photon-imaging-in-the-neocortex-of-anesthetized-mice
#4
Mikhail Kislin, Jeremy Sword, Ioulia V Fomitcheva, Deborah Croom, Evgeny Pryazhnikov, Eero Lihavainen, Dmytro Toptunov, Heikki Rauvala, Andre S Ribeiro, Leonard Khiroug, Sergei A Kirov
: Mitochondria play a variety of functional roles in cortical neurons, from metabolic support and neuroprotection to the release of cytokines that trigger apoptosis. In dendrites, mitochondrial structure is closely linked to their function, and fragmentation (fission) of the normally elongated mitochondria indicates loss of their function under such pathological conditions as stroke and brain trauma. Using in vivo two-photon microscopy in mouse brain, we quantified mitochondrial fragmentation in a full spectrum of cortical injuries ranging from severe to mild...
December 1, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27902850/biomechanical-comparison-of-2-veterinary-locking-plates-to-monocortical-screw-polymethylmethacrylate-fixation-in-canine-cadaveric-cervical-vertebral-column
#5
Bianca F Hettlich, Geoffrey T Fosgate, Alan S Litsky
OBJECTIVE: To compare the biomechanical properties of 2 veterinary locking plates and monocortical screws/polymethylmethacrylate (PMMA) fixation in canine cadaveric cervical vertebral columns. STUDY DESIGN: Biomechanical cadaveric study. MATERIALS: Nineteen cervical vertebral columns (C2-C7) from large breed, skeletally mature, canine cadavers were used. A cortical ring was placed as a disk spacer at C4-C5 in all specimens. Seven vertebral columns were plated at C4-C5 with two 4-hole, 3...
November 30, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27896193/multidisciplinary-approach-to-an-extended-pressure-sore-at-the-lumbosacral-area
#6
Sehoon Yoon, Euicheol Jeong, Hudson Alex Lázaro
A pressure sore wound is often extensive or complicated by local infection involving adjacent soft tissue and bone. In this case, a regional flap after simple debridement is not adequate. Here, we present a case of an extensive pressure sore in the sacral area with deep tissue infection. A 43-year-old female patient with a complicated sore with deep tissue infection had a presacral abscess, an iliopsoas abscess, and an epidural abscess in the lumbar spine. After a multidisciplinary approach performed in stages, the infection had subsided and removal of the devitalized tissue was possible...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27886875/the-role-of-a-miniopen-thoracoscopic-assisted-approach-in-the-management-of-burst-fractures-involving-the-thoracolumbar-junction
#7
REVIEW
Ricky Raj S Kalra, Meic H Schmidt
Thoracoscopic spinal surgery is a minimally invasive open endoscopic approach to the anterior thoracolumbar spine for decompression and stabilization. It offers an alternative to open thoracotomy for thoracolumbar burst fractures, anterior spinal cord decompression, and spinal reconstruction with interbody and anterolateral plate instrumentation for restoration of biomechanical stability and alignment. Posterior instrumentation may not sufficiently stabilize a significantly disrupted anterior load-bearing spinal column, and the high access morbidity of open procedures is of significant concern...
January 2017: Neurosurgery Clinics of North America
https://www.readbyqxmd.com/read/27885641/apophyseal-ossification-of-the-iliac-crest-in-forensic-age-estimation-computed-tomography-standards-for-modern-australian-subadults
#8
Nicolene Lottering, Clair L Alston-Knox, Donna M MacGregor, Maree T Izatt, Caroline A Grant, Clayton J Adam, Laura S Gregory
This study contrasts the ontogeny of the iliac crest apophysis using conventional radiography and multislice computed tomography (MSCT), providing probabilistic information for age estimation of modern Australian subadults. Retrospective abdominopelvic MSCT data acquired from 524 Australian individuals aged 7-25 and surveillance radiographs of adolescent idiopathic scoliosis patients included in the Paediatric Spine Research Group Progression Study (n = 531) were assessed. Ossification scoring of pseudo-radiographs and three-dimensional (3D) volume-rendered reconstructions using Risser (1958) quantitative descriptors indicate discrepancies in age estimates, stage allocation, and conflicting morphological progression...
November 25, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27876481/physical-effects-of-unilateral-mastectomy-on-spine-deformity
#9
Savaş Serel, Zeynep Yasavur Tuzlalı, Zehra Akkaya, Çağlar Uzun, Burak Kaya, Sancar Bayar
OBJECTIVE: Mastectomy is known to effect body posture after a change in the center of gravity of women due to a missing breast. Although previous studies on short-term postural changes in mastectomy patients using photogrammetry or Moiré topography suggested ipsilateral inclination of the trunk, our clinical observations during breast reconstruction surgeries indicated a contralateral shoulder elevation in women with unilateral mastectomy. Because the change in body posture can affect spinal alignment, we aimed to evaluate the long-term physical effects of unilateral mastectomy on spine deformity by radiographic examination...
October 26, 2016: Clinical Breast Cancer
https://www.readbyqxmd.com/read/27875416/comparison-of-structural-disease-burden-to-health-related-quality-of-life-scores-in-264-adult-spinal-deformity-patients-with-2-year-follow-up-novel-insights-into-drivers-of-disability
#10
Joshua Bakhsheshian, Justin K Scheer, Jeffrey L Gum, Lance Horner, Richard Hostin, Virginie Lafage, Shay Bess, Themistocles S Protopsaltis, Douglas C Burton, Malla Keefe, Robert A Hart, Gregory M Mundis, Christopher I Shaffrey, Frank Schwab, Justin S Smith, Christopher P Ames
STUDY DESIGN: This is a review of a prospective multicenter database. OBJECTIVE: To investigate the relationship between preoperative disability and sagittal deformity in patients with high Oswestry Disability Index (ODI) and no sagittal malalignment, or low ODI and high sagittal malalignment. SUMMARY OF BACKGROUND DATA: The relationship between ODI and sagittal malalignment varies between each adult spinal deformity (ASD) patient. METHODS: A prospective multicenter database of 365 patients with ASD undergoing surgical reconstruction was analyzed...
November 21, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27872870/nanoscale-organization-of-synaptic-adhesion-proteins-revealed-by-single-molecule-localization-microscopy
#11
Ingrid Chamma, Florian Levet, Jean-Baptiste Sibarita, Matthieu Sainlos, Olivier Thoumine
The advent of superresolution imaging has created a strong need for both optimized labeling strategies and analysis methods to probe the nanoscale organization of complex biological structures. We present a thorough description of the distribution of synaptic adhesion proteins at the nanoscopic scale, namely presynaptic neurexin-[Formula: see text] ([Formula: see text]), and its two postsynaptic binding partners neuroligin-1 (Nlg1) and leucine-rich-repeat transmembrane protein 2 (LRRTM2). We monitored these proteins in the membrane of neurons by direct stochastic optical reconstruction microscopy, after live surface labeling with Alexa647-conjugated monomeric streptavidin...
October 2016: Neurophotonics
https://www.readbyqxmd.com/read/27871107/the-large-omnidirectional-child-lodc-atd-biofidelity-comparison-with-the-hybrid-iii-10-year-old
#12
Jason Stammen, Kevin Moorhouse, Brian Suntay, Michael Carlson, Yun-Seok Kang
When the Hybrid III 10-year old (HIII-10C) anthropomorphic test device (ATD) was adopted into Code of Federal Regulations (CFR) 49 Part 572 as the best available tool for evaluating large belt-positioning booster seats in Federal Motor Vehicle Safety Standard (FMVSS) No. 213, NHTSA stated that research activities would continue to improve the performance of the HIII-10C to address biofidelity concerns. A significant part of this effort has been NHTSA's in-house development of the Large Omnidirectional Child (LODC) ATD...
November 2016: Stapp Car Crash Journal
https://www.readbyqxmd.com/read/27865885/perforations-and-angulations-of-324-cervical-medial-cortical-pedicle-screws-a-possible-guide-to-avoid-lateral-perforations-with-use-of-pedicle-screws-in-lower-cervical-spine
#13
Bijjawara Mahesh, Bidre Upendra, Sekharappa Vijay, Kumar Arund, Reddy Srinivas
BACKGROUND: Context : More than half of the perforations reported with usage of cervical pedicle screws (CPS), are lateral perforations, endangering the vertebral artery. The medial cortical pedicle screw technique (MCPS) with partial drilling of the medial cortex, shifts the trajectory of pedicle screws medially, decreasing the lateral perforations. PURPOSE: To evaluate the decrease in lateral perforations of CPS with use of MCPS technique, in relation to medial angulation...
November 16, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27859046/defensive-traits-exhibit-an-evolutionary-trade-off-and-drive-diversification-in-ants
#14
Benjamin D Blanchard, Corrie S Moreau
Evolutionary biologists have long predicted that evolutionary trade-offs among traits should constrain morphological divergence and species diversification. However, this prediction has yet to be tested in a broad evolutionary context in many diverse clades, including ants. Here, we reconstruct an expanded ant phylogeny representing 82% of ant genera, compile a new family-wide trait database, and conduct various trait-based analyses to show that defensive traits in ants do exhibit an evolutionary trade-off...
November 9, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27854109/effect-of-mono-or-bisegmental-lordosizing-fusion-on-short-term-global-and-index-sagittal-balance-a-radiographic-study
#15
Enrico Tessitore, Ilaria Melloni, Oliver P Gautschi, Gianluigi Zona, Karl Schaller, Pedro Berjano
BACKGROUND: Sagittal balance is widely recognized as an important outcome factor in reconstructive spinal surgery for lumbar degenerative conditions. However, its role in short segmental fixation is unknown. The aim of this study is to evaluate the preoperative and short-term postoperative spino-pelvic balance after short (1 or 2 levels) lordosizing lumbar fusion for degenerative disc disease (DDD). MATERIALS AND METHODS: Twenty-six consecutive patients (13 males and 13 females) undergoing mono- or bisegmental lordosizing lumbar fusion (XLIF/TLIF) for lumbar DDD were included in the study...
November 17, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27847734/surgical-implications-of-anatomical-variation-in-anterolateral-thigh-flaps-for-the-reconstruction-of-oral-and-maxillofacial-soft-tissue-defects-focus-on-perforators-and-pedicles
#16
Ji-Wan Kim, Dong-Young Kim, Kang-Min Ahn, Jee-Ho Lee
OBJECTIVES: To gain information on anatomical variation in anterolateral thigh (ALT) flaps in a series of clinical cases, with special focus on perforators and pedicles, for potential use in reconstruction of oral and maxillofacial soft tissue defects. MATERIALS AND METHODS: Eight patients who underwent microvascular reconstructive surgery with ALT free flaps after ablative surgery for oral cancer were included. The number of perforators included in cutaneous flaps, location of perforators (septocutaneous or musculocutaneous), and the course of vascular pedicles were intraoperatively investigated...
October 2016: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/27834626/bilateral-c-1-lateral-mass-reconstruction-following-radical-resection-of-a-giant-osteoblastoma-of-the-atlas-case-report
#17
Iulia Peciu-Florianu, Gopalakrishnan Chittur Viswanathan, Juan Barges-Coll, Gabriel A Castillo-Velázquez, Pierre-Yves Zambelli, John M Duff
Osteoblastoma is a rare, benign, osteoid-producing, and slow-growing primary bone tumor, typically arising in long bones or in the spine, with a slight male predominance. This report describes the surgical treatment of a giant C-1 (atlantal) osteoblastoma diagnosed in a young male patient with neurofibromatosis Type 1. The authors describe the clinical presentation, the surgical procedure for complete excision and stabilization, and results as of the 1-year follow-up. They detail a bilateral occipitoaxial spinal interarticular stabilization technique that they used after complete tumor excision...
November 11, 2016: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/27833794/three-dimensional-paleohistology-of-the-scale-and-median-fin-spine-of-lophosteus-superbus-pander-1856
#18
Anna Jerve, Qingming Qu, Sophie Sanchez, Henning Blom, Per Erik Ahlberg
Lophosteus superbus is one of only a handful of probable stem-group osteichthyans known from the fossil record. First collected and described in the late 19th century from the upper Silurian Saaremaa Cliff locality in Estonia, it is known from a wealth of disarticulated scales, fin spines, and bone fragments. In this study we provide the first description of the morphology and paleohistology of a fin spine and scale from Lophosteus using virtual thin sections and 3D reconstructions that were segmented using phase-contrast synchrotron X-ray microtomography...
2016: PeerJ
https://www.readbyqxmd.com/read/27833291/a-case-report-of-acampomelic-campomelic-dysplasia-and-operative-difficulties-in-cleft-palate-reconstruction
#19
M Pasupathy, Vasant Radhakrishnan, Hirji Sorab Adenwalla, Puthucode V Narayanan
Acampomelic campomelic dysplasia (CD) is a type of CD (CD; OMIM #114290), a rare form of congenital short-limbed dwarfism and is due to mutations in SOX9 gene family. Characteristic phenotypes of CD include bowing of the lower limbs, a narrow thoracic cage, 11 pairs of ribs, hypoplastic scapulae, macrocephaly, flattened supraorbital ridges and nasal bridge, cleft palate and micrognathia. The bending of the long bones is not an obligatory feature and is absent in about 10% of cases, referred to as acampomelic CD...
May 2016: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/27831990/are-traditional-radiographic-methods-accurate-predictors-of-pedicle-morphology
#20
Venita Simpson, Brandon Clair, Nathaniel R Ordway, Stephen A Albanese, William F Lavelle
STUDY DESIGN: Cadaveric in vitro computed tomography (CT) imaging study. OBJECTIVE: To examine minimum pedicle diameter from transverse and coronal CT reconstructions of thoracolumbar spine specimens and compare their degree of disparity, if any. Pedicle angulation in coronal and transverse planes was measured and their contribution to the disparity in minimum pedicle diameter was assessed. SUMMARY OF BACKGROUND DATA: Spinal minimum pedicle diameter can be obtained from both transverse and coronal CT reconstructions; however, the degree of disparity in these measurements has not been described previously...
November 15, 2016: Spine
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