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Jefferson fracture

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https://www.readbyqxmd.com/read/29048517/vertebral-compression-fracture-after-spine-stereotactic-body-radiation-therapy-a-review-of-the-pathophysiology-and-risk-factors
#1
Salman Faruqi, Chia-Lin Tseng, Cari Whyne, Majed Alghamdi, Jefferson Wilson, Sten Myrehaug, Hany Soliman, Young Lee, Pejman Maralani, Victor Yang, Charles Fisher, Arjun Sahgal
BACKGROUND: Vertebral compression fracture (VCF) is a challenging and not infrequent complication observed following spine stereotactic body radiation therapy (SBRT). OBJECTIVE: To summarize the data from the multiple studies that have been published, addressing the risk and predictive factors for VCF post-SBRT. METHODS: A systematic literature review was conducted. Studies were selected if they specifically addressed risk factors for post-SBRT VCF in their analyses...
October 18, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29019572/epidemiological-profile-and-treatment-of-substance-losses-by-trauma-to-the-lower-limbs
#2
Ricardo Barros Martins Rezende, Jefferson Lessa Soares de Macedo, Simone Corrêa Rosa, Fernando Soares Galli
OBJECTIVES: to evaluate the epidemiological profile, the surgical treatment and the postoperative results of patients with complex traumatic injuries to the lower limbs. METHODS: we conducted a retrospective study of patients with traumatic complex injuries treated by the Plastic Surgery Service of a regional hospital in Brasília. We analyzed clinical-epidemiological data, type of surgical procedure and functional recovery of the limb after six months of treatment...
September 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28936283/influence-of-thermal-and-mechanical-fatigue-on-the-shear-bond-strength-of-different-all-ceramic-systems
#3
Hugo-Alberto Vidotti, Jefferson-Ricardo Pereira, Elizeu Insaurralde, Luiz F Plaça, José R Delben, Accácio-Lins do Valle
BACKGROUND: To evaluate the influence of thermal and mechanical fatigue on the shear bond strength of different all-ceramic cores and veneering porcelain interfaces. MATERIAL AND METHODS: All-ceramic systems tested were lithium disilicate and zirconia veneered by layering technique. Sixty specimens (n=20) were subjected to shear bond strength. Ten of them were thermal and mechanical cycled. Fracture analysis was performed with stereomicroscopy and scanning electron microscopy...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28828161/effect-of-saliva-contamination-on-cementation-of-orthodontic-brackets-using-different-adhesive-systems
#4
Aliden-Willian Robaski, Saulo Pamato, Marcelo Tomás-de Oliveira, Jefferson-Ricardo Pereira
BACKGROUND: The enamel condition and the quality of surface are points that need to be considered for achieving optimal efficiency in the treatment with orthodontic brackets. The aim of this study was to assess the immediate bond strength of metallic brackets cemented to dental. MATERIAL AND METHODS: Forty human premolars were double-sectioned, placed in PVC matrices and randomly divided into 10 groups (n=8). They received artificial saliva contamination before or after the application of adhesive systems, except for the control groups...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28660396/resolution-of-traumatic-vertebral-artery-dissection-and-occlusion-after-repositioning-and-posterior-c1-ring-osteosynthesis-of-a-displaced-jefferson-burst-fracture
#5
Andy Ottenbacher, Martin Bettag
A 70-year-old male sustained a Jefferson burst fracture with unilateral vertebral artery dissection and occlusion by displaced fragments. We performed reduction and posterior C1-ring osteosynthesis. We present a description of the intraoperative manual assessment of atlantoaxial stability. The vertebral artery was found with a good anterograde flow posteroperatively, and MRA showed reperfusion of the vessel. The patient was free of pain with preserved C1-C2 rotation after 6 weeks. Function-preserving posterior C1-ring osteosynthesis after reduction in a displaced Jefferson burst fracture complicated by vertebral artery dissection and occlusion may restore blood flow...
August 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28653130/reduction-and-ring-fixation-of-instable-c1-fractures-with-monoaxial-pedicle-screws
#6
Rainer Gumpert, Thomas Poglitsch, Renate Krassnig, Rudolf Pranzl, Paul Puchwein
INTRODUCTION: Ring fixation of C1 can be performed using pedicle screws and a rod in case of unstable Jefferson or lateral mass fractures of C1. MATERIALS AND METHODS: In a case series of three patients, we stabilized C1 fractures surgically using a modified technique of C1 ring fixation by using monoaxial instead of polyaxial screws. Functional outcome and pain was recorded postoperatively. RESULTS: In this very small case series, we observed good results concerning pain and functional outcome...
June 26, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28489206/lower-extremity-reconstruction-epidemiology-management-and-outcomes-of-patients-of-the-federal-district-north-wing-regional-hospital
#7
Jefferson Lessa Soares Macedo, Simone Corrêa Rosa, Daniel Lobo Botelho, Clendes Pereira Dos Santos, Murilo Neves DE Queiroz, Tabatha Gonçalves Andrade Castelo Branco Gomes
Objective: to evaluate the management of lower limbs complex traumatic injuries by analyzing their characteristics, types, conduct and evolution, with emphasis on surgical treatment. Methods: we conducted a prospective study of patients treated by Plastic Surgery at a regional hospital of the Federal District during a one-year period. We collected data through serial evaluations and telephone contact records. Results: we studied 40 patients, with a mean age of 25...
January 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28447646/a-130-000-year-old-archaeological-site-in-southern-california-usa
#8
Steven R Holen, Thomas A Deméré, Daniel C Fisher, Richard Fullagar, James B Paces, George T Jefferson, Jared M Beeton, Richard A Cerutti, Adam N Rountrey, Lawrence Vescera, Kathleen A Holen
The earliest dispersal of humans into North America is a contentious subject, and proposed early sites are required to meet the following criteria for acceptance: (1) archaeological evidence is found in a clearly defined and undisturbed geologic context; (2) age is determined by reliable radiometric dating; (3) multiple lines of evidence from interdisciplinary studies provide consistent results; and (4) unquestionable artefacts are found in primary context. Here we describe the Cerutti Mastodon (CM) site, an archaeological site from the early late Pleistocene epoch, where in situ hammerstones and stone anvils occur in spatio-temporal association with fragmentary remains of a single mastodon (Mammut americanum)...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28431136/c1-lateral-mass-displacement-and-transverse-atlantal-ligament-failure-in-jefferson-s-fracture-a-biomechanical-study-of-the-rule-of-spence
#9
Rafeek O Woods, Serkan Inceoglu, Yusuf T Akpolat, Wayne K Cheng, Brice Jabo, Olumide Danisa
BACKGROUND: Jefferson's fracture, first described in 1927, represents a bursting fracture of the C1 ring with lateral displacement of the lateral masses. It has been determined that if the total lateral mass displacement (LMD) exceeds 6.9 mm, there is high likelihood of transverse atlantal ligament (TAL) rupture, and if LMD is less than 5.7 mm TAL injury is unlikely. Several recent radiographic studies have questioned the accuracy and validity of the "rule of Spence" and it lacks biomechanical support...
April 20, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28281710/negative-poisson-s-ratio-in-rippled-graphene
#10
Huasong Qin, Yu Sun, Jefferson Zhe Liu, Mengjie Li, Yilun Liu
In this work, we perform molecular dynamics (MD) simulations to study the effect of rippling on the Poisson's ratio of graphene. Due to the atomic scale thickness of graphene, out-of-plane ripples are generated in free standing graphene with topological defects (e.g. heptagons and pentagons) to release the in-plane deformation energy. Through MD simulations, we have found that the Poisson's ratio of rippled graphene decreases upon increasing its aspect ratio η (amplitude over wavelength). For the rippled graphene sheet η = 0...
March 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28216748/comparison-of-occipitocervical-and-atlantoaxial-fusion-in-treatment-of-unstable-jefferson-fractures
#11
Yong Hu, Zhen-Shan Yuan, Christopher K Kepler, Wei-Xin Dong, Xiao-Yang Sun, Jiao Zhang
BACKGROUND: Controversy exists regarding the management of unstable Jefferson fractures, with some surgeons performing reduction and immobilization of the patient in a halo vest and others performing open reduction and internal fixation. This study compares the clinical and radiological outcome parameters between posterior atlantoaxial fusion (AAF) and occipitocervical fusion (OCF) constructs in the treatment of the unstable atlas fracture. MATERIALS AND METHODS: 68 consecutive patients with unstable Jefferson fractures treated by AAF or OCF between October 2004 and March 2011 were included in this retrospective evaluation from institutional databases...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28211481/effects-of-strength-training-on-osteogenic-differentiation-and-bone-strength-in-aging-female-wistar-rats
#12
Monique Patricio Singulani, Camila Tami Stringhetta-Garcia, Leandro Figueiredo Santos, Samuel Rodrigues Lourenço Morais, Mário Jefferson Quirino Louzada, Sandra Helena Penha Oliveira, Antonio Hernandes Chaves Neto, Rita Cássia Menegati Dornelles
The effects of strength training (ST) on the mechanical bone strength and osteogenic differentiation of bone marrow mesenchymal stromal cells (BMSCs) from adult, aged and exercised aged rats were determined. The exercised aged animals displayed higher values of areal bone mineral density, compression test, alkaline phosphatase activity (ALP) and biological mineralization, while oil red O staining for adipocytes was lower. ST increased gene expression of runt-related transcription factor 2 (Runx2), osterix (Osx) as well as bone matrix protein expression, and reduced expression of peroxisome proliferator-activated receptor gamma (Pparγ)...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28149471/bond-strength-of-adhesive-resin-cement-with-different-adhesive-systems
#13
Fabrizio Lorenzoni E Silva, Saulo Pamato, Milton-Carlos Kuga, Marcus-Vinicius-Reis Só, Jefferson-Ricardo Pereira
BACKGROUND: To assess the immediate bond strength of a dual-cure adhesive resin cement to the hybridized dentin with different bonding systems. MATERIAL AND METHODS: Fifty-six healthy human molars were randomly divided into 7 groups (n=8). After 3 longitudinal sections, the central cuts were included in PVC matrix and were submitted to dentin hybridization according to the groups: G1 - etch & rinse system with 3-step (Apder™ Scotchbond™ Multi-Purpose, 3M ESPE), G2 - etch & rinse system with 3-step (Optibond™ FL, Kerr), G3 - etch & rinse system with 3-step (All-Bond 3®, Bisco), G4 - etch & rinse simplified system (Adper™ Single Bond 2, 3M ESPE), G5 - self-etching system with one step (Bond Force, Tokuyama), G6 - universal system in moist dentin (Single Bond Universal, 3M ESPE), G7 - universal system in dry dentin (Single Bond Universal, 3M ESPE)...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27810454/management-of-type-ii-odontoid-fractures-experience-from-latin-american-spine-centers
#14
MULTICENTER STUDY
Asdrubal Falavigna, Orlando Righesso, Pedro Guarise da Silva, Carlos Rocca Siri, Jefferson W Daniel, José Carlos Esteves Veiga, Gustavo Borges Laurindo de Azevedo, Luis Eduardo Carelli, Ratko Yurac, Felix Adolfo Sanchez Chavez, Ericson Sfreddo, Andre Cecchini, Marcelo Martins do Reis, Jose Maria Jiménez Avila, K Daniel Riew
OBJECTIVE: To analyze characteristics of type II odontoid fracture (TII-OF), including clinical and radiographic factors, that influence surgical planning in 8 Latin American centers. METHODS: Retrospective chart review was performed of 88 patients with TII-OF between 2004 and 2015 from 8 Latin American centers. Parameters studied included 1) demographic data and causes of TII-OF, 2) clinical and neurologic presentation, 3) characteristics of fracture (degree of odontoid displacement, displacement of odontoid relative to C2 body, anatomy of fracture line, distance between fragments, presence of comminution, contact area between odontoid and C2 body), 4) type of treatment, and 5) clinical and radiographic outcome...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27781189/the-development-of-a-universally-accepted-sacral-fracture-classification-a-survey-of-aospine-and-aotrauma-members
#15
Gregory D Schroeder, Mark F Kurd, Christopher K Kepler, James C Krieg, Jefferson R Wilson, Conor P Kleweno, Reza Firoozabadi, Carlo Bellabarba, Frank Kandizoria, Klause J Schnake, S Rajesekaran, Marcel F Dvorak, Jens R Chapman, Luiz R Vialle, F C Oner, Alexander R Vaccaro
Study Design Survey study. Objective To determine the global perspective on controversial aspects of sacral fracture classifications. Methods While developing the AOSpine Sacral Injury Classification System, a survey was sent to all members of AOSpine and AOTrauma. The survey asked four yes-or-no questions to help determine the best way to handle controversial aspects of sacral fractures in future classifications. Chi-square tests were initially used to compare surgeons' answers to the four key questions of the survey, and then the data was modeled through multivariable logistic regression analysis...
November 2016: Global Spine Journal
https://www.readbyqxmd.com/read/27756739/defining-the-fracture-population-in-a-pragmatic-multicentre-randomised-controlled-trial-profher-and-the-neer-classification-of-proximal-humeral-fractures
#16
H H G Handoll, S D Brealey, L Jefferson, A Keding, A J Brooksbank, A J Johnstone, J J Candal-Couto, A Rangan
OBJECTIVES: Accurate characterisation of fractures is essential in fracture management trials. However, this is often hampered by poor inter-observer agreement. This article describes the practicalities of defining the fracture population, based on the Neer classification, within a pragmatic multicentre randomised controlled trial in which surgical treatment was compared with non-surgical treatment in adults with displaced fractures of the proximal humerus involving the surgical neck...
October 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/27703609/does-hybridized-dentin-affect-bond-strength-of-self-adhesive-resin-cement
#17
Saulo Pamato, Accácio-Lins do Valle, Gustavo-Henrique-Barbosa de Andrade, Hugo-Alberto Vidotti, Marcus-Vinícius-Reis Só, Jefferson-Ricardo Pereira
BACKGROUND: Evaluate the influence of different hybridization bonding techniques of a self-adhesive resin cement. MATERIAL AND METHODS: 30 human health molars were divided into six groups (n=10). The specimens received three longitudinal sections, allowing insertion of central cuts in PVC matrices. Each group received a different dentin pretreatment according to the manufacturer's recommendations, except the control group (G1), as follows. G2 - a 3-step total-etch adhesive system (Optibond™ FL, Kerr); G3 - a 3-step total-etch adhesive system (Adper™ Scotchbond™ Multi-Purpose, 3M ESPE); G4 - a 2-step total-etch adhesive system (Adper™ Single Bond 2, 3M ESPE); G5 - a single-step self-etching system (Bond Force, Tokuyama); and G6 - universal bonding system (Single Bond Universal, 3M ESPE)...
October 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27673193/poster-443-diving-injury-resulting-in-a-jefferson-fracture-vertebral-artery-thrombosis-and-brown-sequard-syndrome-a-case-report
#18
Rafael E Arias-Berrios, Shirley A Grigg Ortiz, Natalia M Betances Ramírez, Ana M Ortiz Santiago, José A Báez
No abstract text is available yet for this article.
September 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27559444/ankylosing-spondylitis-patterns-of-spinal-injury-and-treatment-outcomes
#19
Idiris Altun, Kasım Zafer Yuksel
STUDY DESIGN: Retrospective review. PURPOSE: We retrospectively reviewed our patients with ankylosing spondylitis (AS) to identify their patterns of spinal fractures to help clarify management strategies and the morbidity and mortality rates associated with this group of patients. OVERVIEW OF LITERATURE: Because of the brittleness of bone and long autofused spinal segments in AS, spinal fractures are common even after minor trauma and often associated with overt instability...
August 2016: Asian Spine Journal
https://www.readbyqxmd.com/read/27260639/scaphoid-waist-internal-fixation-for-fractures-trial-swifft-protocol-a-pragmatic-multi-centre-randomised-controlled-trial-of-cast-treatment-versus-surgical-fixation-for-the-treatment-of-bi-cortical-minimally-displaced-fractures-of-the-scaphoid-waist-in-adults
#20
Joseph Dias, Stephen Brealey, Surabhi Choudhary, Liz Cook, Matthew Costa, Caroline Fairhurst, Catherine Hewitt, Stephen Hodgson, Laura Jefferson, Kanagaratnam Jeyapalan, Ada Keding, Paul Leighton, Amar Rangan, Gerry Richardson, Claire Rothery, Nicholas Taub, John Thompson, David Torgerson
BACKGROUND: A scaphoid fracture is the most common type of carpal fracture affecting young active people. The optimal management of this fracture is uncertain. When treated with a cast, 88 to 90 % of these fractures unite; however, for the remaining 10-12 % the non-union almost invariably leads to arthritis. The alternative is surgery to fix the scaphoid with a screw at the outset. METHODS/DESIGN: We will conduct a randomised controlled trial (RCT) of 438 adult patients with a "clear" and "bicortical" scaphoid waist fracture on plain radiographs to evaluate the clinical effectiveness and cost-effectiveness of plaster cast treatment (with fixation of those that fail to unite) versus early surgical fixation...
June 4, 2016: BMC Musculoskeletal Disorders
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