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Christian B Theodotou, George M Ghobrial, Andrew L Middleton, Michael Y Wang, Allan D Levi
BACKGROUND: Cervical facet dislocations are among the most common traumatic spinal injuries. Posterior, anterior, and combined surgical approaches have been described and are widely debated. OBJECTIVE: To demonstrate efficacy in anterior-only surgical management for subaxial cervical facet dislocations. METHODS: A consistent surgical algorithm for cervical facet dislocation was applied over a 19-yr period and analyzed retrospectively in adults with acute unilateral or bilateral facet dislocation of the subaxial cervical spine...
March 14, 2018: Neurosurgery
Varun Chandra, Danielle Buck, Rahul Chakrabarti, Alan McNab
A 24-year-old woman presented with a 1-year history of gradually increasing pain on eye movements, worse on the right. She had a significant background of undergoing intracranial correction of orbital hypertelorism with internal fixation of the lateral orbital rims at the age of 6 years. Imaging was consistent with bilateral metallic foreign bodies from both lateral orbital rims protruding into the globes. The patient underwent removal of bilateral plates and screws, with a significant improvement of symptoms and ocular motility postoperatively...
March 14, 2018: Ophthalmic Plastic and Reconstructive Surgery
Li-Hui Mou, Qing-Yu Liu, Ting Zhang, Zi-Yu Li, Sheng-Gui He
Dinitrogen activation/fixation is one of the most important and challenging subjects in synthetic as well as theoretical chemistry. In this study, the adsorption reactions of N2 onto TaCn - ( n = 1-4) cluster anions have been investigated by means of mass spectrometry in conjunction with density functional theory calculations. Following the experimental results that only TaC4 - was observed to adsorb N2 , theoretical calculations predicted that TaC4 - reaction system (TaC4 - + N2 → TaC4 N2 - ) has a negligible barrier on the approach of N2 molecule while insurmountable barriers are located on the reaction pathways of TaC1-3 - /N2 reaction systems...
March 16, 2018: Journal of Physical Chemistry. A
Binit Sureka, Aliza Mittal, Mahesh K Mittal, Kanhaiya Agarwal, Mukul Sinha, Brij Bhushan Thukral
Background: Accurate and detailed measurements of spinal canal diameter (SCD) and transverse foraminal morphometry are essential for understanding spinal column-related diseases and for surgical planning, especially for transpedicular screw fixation. This is especially because lateral cervical radiographs do not provide accurate measurements. Aim: This study was conducted to measure the dimensions of the transverse foramen sagittal and transverse diameters (SFD, TFD), SCD, and the distance of spinal canal from the transverse foramina (dSC-TF) at C1-C7 level in the Indian population...
March 2018: Neurology India
Yashwant Singh Tanwar, Yatinder Kharbanda, Atin Jaiswal, Vikas Birla, Ramsagar Pandit
INTRODUCTION: Coronal plane distal humeral injuries are relatively rare. Numerous classification systems have been proposed as the complexity of these fractures has been realized. We in the present series of ten patients describe the surgical technique of Open Reduction and Internal Fixation of Coronal plane fractures of the distal humerus with headless compression screws performed using the anterolateral approach. MATERIAL AND METHOD: It was a retrospective study, the data collected from March 2010 to 2015 was analysed and the final outcome was assessed using the DASH score...
2018: SICOT-J
Ayman Ebied, Ahmed Zayda, Sameh Marei, Hany Elsayed
INTRODUCTION: Successful treatment of knee comminuted periarticular fractures associated with osteoporosis and pre-existing arthritis is a challenging task. METHODS: This is a prospective study on 27 patients who had comminuted intra and periarticular knee fractures and pre-existing arthritis. Fractures were classified according to Muller's AO classification. Primary knee arthroplasty was performed ± internal fixation following 4 weeks of splinting. A stem was added to the tibial tray and Legacy Constrained Condylar Knee (LCCK) or Rotating Hinge (RH) prosthesis were used depending on the level of ligament damage and bone defects...
2018: SICOT-J
Tayfun Bacaksız, Cemal Kazimoglu, Ali Reisoglu, Ali Turgut, Erdem Kumtepe, Haluk Agus
BACKGROUND: The minimally invasive technique (percutaneous screw fixation) is one of the options for treating tongue-type IIC fractures successfully. The aim of this study was to assess the biomechanics of four different screw configurations used for the fixation of tongue-type IIC calcaneal fractures. METHODS: Identical osteotomies, recapitulating a type IIC injury, were created in synthetic calcaneus specimens using a saw. The specimens were randomly assigned to one of the four fixation groups (n = 7 per group): two divergent screws, two parallel screws, two parallel screws plus one screw axially oriented toward the sustentaculum tali, and three parallel screws...
January 2018: Journal of the American Podiatric Medical Association
Vsevolod A Peshkov, Olga P Pereshivko, Anton A Nechaev, Anatoly A Peshkov, Erik V Van der Eycken
This focused review aims to summarize recent developments in the processes involving additions of secondary propargylamines to various heteroallenes and subsequent transition metal-catalyzed or electrophile-mediated cyclizations. The utility of this convenient and tunable strategy spans from the carbon dioxide fixation and target-oriented synthesis of complex natural and biologically active products to the generation of extended synthetic libraries of diverse oxygen-, nitrogen- and sulfur-containing heterocycles...
March 16, 2018: Chemical Society Reviews
Peter Bond, David B Parkinson
The use of electron microscopy allows analysis of the microarchitecture of peripheral nerves both during development and in the processes of nerve regeneration and repair.We describe a novel method for the rapid analysis and quantification of myelin in peripheral nerve using a low vacuum scanning electron microscopy protocol. For this methodology, excised nerves are prepared for traditional transmission electron microscopy (TEM) imaging, but at the stage where semi-thin sections would be taken, the resin block is instead imaged at low vacuum in the scanning electron microscope (SEM) using the backscattered electron signal...
2018: Methods in Molecular Biology
Vania W Almeida, Margaret L Bates, Mary Bartlett Bunge
The transmission electron microscope (TEM) enables a unique and valuable examination of cellular and extracellular elements in tissue in situ, in cultured cells, or in pellets derived from suspensions of cells or other materials such as nanoparticles. Here we focus on the preparation of cultured Schwann cells or Schwann cell-containing dorsal root ganglion cultures. To gain as life-like as possible views of the cellular details, it is imperative to achieve excellent preservation of the cellular structure. The steps in the preparation of cultures described in this chapter represent the results of many years of accumulated TEM images to find the best methods of preservation for Schwann cells, myelin, and basal lamina components...
2018: Methods in Molecular Biology
Andrea Marotta, Rafael Román-Caballero, Juan Lupiáñez
Eye gaze conveys rich information concerning the states of mind of others, playing a critical role in social interactions, signaling internal states, and guiding others' attention. On the basis of its social significance, some researchers have proposed that eye gaze may represent a unique attentional stimulus. However, contrary to this notion, the majority of the literature has shown indistinguishable attentional effects when eye gaze and arrows have been used as cues. Taking a different approach, in this study we aimed at finding qualitative attentional differences between gazes and arrows when they were used as targets instead of as cues...
March 15, 2018: Psychonomic Bulletin & Review
Young Woong Jang, DoHyung Lim, Hansol Seo, Myung Chul Lee, O-Sung Lee, Yong Seuk Lee
INTRODUCTION: Open-wedge high tibial osteotomy (OWHTO) is a well-established surgical option for medial compartment osteoarthritis of the varus knee. The initial strength of the fixation plate is critical for successful correction maintenance and healing of the osteotomy site. This study was conducted to verify if a newly designed anatomical plate (LCfit) improves the stability of both the medial implant and lateral hinge area, as well as to evaluate how the metal block contributes to both medial and lateral stability...
March 15, 2018: Archives of Orthopaedic and Trauma Surgery
Silvina M Y López, Ma Dolores Molina Sánchez, Graciela N Pastorino, Mario E E Franco, Nicolás Toro García, Pedro A Balatti
The purpose of this work was to study further two Bradyrhizobium japonicum strains with high nitrogen-fixing capacity that were identified within a collection of approximately 200 isolates from the soils of Argentina. Nodulation and nitrogen-fixing capacity and the level of expression of regulatory as well as structural genes of nitrogen fixation and the 1-aminocyclopropane-1-carboxylate (ACC) deaminase gene of the isolates were compared with that of E109-inoculated plants. Both isolates of B. japonicum, 163 and 366, were highly efficient to fix nitrogen compared to commercial strain E109...
March 15, 2018: Current Microbiology
Manuel Delgado-Baquerizo, David J Eldridge, Fernando T Maestre, Senani B Karunaratne, Pankaj Trivedi, Peter B Reich, Brajesh K Singh
The technical comment from Sanderman provides a unique opportunity to deepen our understanding of the mechanisms explaining the role of paleoclimate in the contemporary distribution of global soil C content, as reported in our article. Sanderman argues that the role of paleoclimate in predicting soil C content might be accounted for by using slowly changing soil properties as predictors. This is a key point that we highlighted in the supplementary materials of our article, which demonstrated, to the degree possible given available data, that soil properties alone cannot account for the unique portion of the variation in soil C explained by paleoclimate...
March 2018: Science Advances
Peter L Cummins, Babu Kannappan, Jill E Gready
The ubiquitous enzyme Ribulose 1,5-bisphosphate carboxylase-oxygenase (RuBisCO) fixes atmospheric carbon dioxide within the Calvin-Benson cycle that is utilized by most photosynthetic organisms. Despite this central role, RuBisCO's efficiency surprisingly struggles, with both a very slow turnover rate to products and also impaired substrate specificity, features that have long been an enigma as it would be assumed that its efficiency was under strong evolutionary pressure. RuBisCO's substrate specificity is compromised as it catalyzes a side-fixation reaction with atmospheric oxygen; empirical kinetic results show a trend to tradeoff between relative specificity and low catalytic turnover rate...
2018: Frontiers in Plant Science
Walid Korani, Ye Chu, C Corley Holbrook, Peggy Ozias-Akins
Post-harvest aflatoxin contamination is a challenging issue that affects peanut quality. Aflatoxin is produced by fungi belonging to the Aspergilli group, and is known as an acutely toxic, carcinogenic and immune-suppressing class of mycotoxins. Evidence for several host genetic factors that may impact aflatoxin contamination has been reported, e.g. , genes for lipoxygenase (PnLOX1 and PnLOX2/PnLOX3 that showed either positive or negative regulation with Aspergillus infection), ROS, and WRKY (highly associated with or differentially expressed upon infection of maize with A...
March 15, 2018: Genetics
So Young Kim, Sun-June Park, Kap Sung Oh
PURPOSE: With the aim of implementing good projection of the three-dimensional frame (auriculo-cephalic angle) and maintaining projection, a significant issue during the stage of auricular elevation for avoiding the potential for dislodging the cartilage blocks remains. Herein we present an innovative and technically simple method of transcutaneous fixation of the costal cartilage block during the stage of auricular elevation. MATERIALS AND METHODS: After elevation of ear frame from the basement, two suspension stitches on the surface of the elevated ear were used to fix the embedding cartilage block into the auriculo-cephalic sulcus at the upper (bifurcation point of the anti-helix where the inferior and superior crus meet to form the triangular fossa) and lower (projection point of the concha wall, parallel to the level of the tragus) ones...
February 2, 2018: Journal of Cranio-maxillo-facial Surgery
Ezio Lanza, Riccardo Muglia, Luigi Alessandro Solbiati, Marco Tramarin, Dario Poretti, Vittorio Pedicini
BACKGROUND: The aim of this study is to report the results of transarterial embolization (TAE) in the setting of postoperative bleeding after hip surgery. METHODS: We retrospectively evaluated 40 patients (male:female = 15:25, median age = 68 years) who underwent TAE from 2006 to 2016: 77.5% underwent total hip arthroplasty, 20% open reduction internal fixation, and 2.5% external fixation. Preangiographic multidetector computed tomography angiography was performed in 20 (49%) cases, and 9 of them showed arterial extravasation...
February 15, 2018: Journal of Arthroplasty
Carlo Doria, Giulia Raffaella Mosele, Massimo Balsano, Gianluca Maestretti, Gianfilippo Caggiari
OBJECTIVES: The aim of this study was to evaluate the results on anterior decompression and fusion with titanium mesh or expanding cage and plate fixation in patients with cervical myelopathy. METHODS: We conducted a retrospective multicentric review of 114 patients, 75 males and 39 females, with cervical myelopathy who underwent surgical treatment between July 2009 to December 2011. All surgeries were performed via a ventral approach. Based on the type of surgery the patients received, they were divided into 3 groups: group 1 consisted of 49 patients who received multilevel corpectomies and fusion with strut iliac bone graft and plates; group 2 consisted of 26 patients who received multilevel corpectomies and fusion with titanium expanding cage and plating; group 3 consisted of 39 patients who received multilevel corpectomies and fusion using titanium mesh with autologous bone graft and anterior plating...
March 12, 2018: Acta Orthopaedica et Traumatologica Turcica
Chengshuai Yang, Shunyao Shen, Jingyang Wu, Shilei Zhang
Mandibular reconstruction after partial or subtotal resection is considered a challenging procedure that is crucial for facial contour and function. Many reports regarding the reconstruction of mandibular defects have been published over the years. The fibula free flap has become a popular option for mandibular reconstruction since its introduction by Hidalgo in 1989. However, the locations of the reconstructed mandibular angle and the condyle of the fibular bone segments play a crucial role in facial symmetry and function...
February 20, 2018: Journal of Oral and Maxillofacial Surgery
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