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https://www.readbyqxmd.com/read/28432905/statistical-analysis-of-dislocations-and-dislocation-boundaries-from-ebsd-data
#1
C Moussa, M Bernacki, R Besnard, N Bozzolo
Electron BackScatter Diffraction (EBSD) is often used for semi-quantitative analysis of dislocations in metals. In general, disorientation is used to assess Geometrically Necessary Dislocations (GNDs) densities. In the present paper, we demonstrate that the use of disorientation can lead to inaccurate results. For example, using the disorientation leads to different GND density in recrystallized grains which cannot be physically justified. The use of disorientation gradients allows accounting for measurement noise and leads to more accurate results...
April 14, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28431543/more-complications-in-uncemented-compared-to-cemented-hemiarthroplasty-for-displaced-femoral-neck-fractures-a-randomized-controlled-trial-of-201-patients-with-one-year-follow-up
#2
Sophie Moerman, Nina M C Mathijssen, Dieu D Niesten, Roeland Riedijk, Willard J Rijnberg, Sander Koëter, Keetie Kremers van de Hei, Wim E Tuinebreier, Tim L Molenaar, Rob G H H Nelissen, Anne J H Vochteloo
BACKGROUND: It is unclear whether cemented or uncemented hemiarthroplasty is the best treatment option in elderly patients with displaced femoral neck fractures. Previous randomized trials comparing cemented and uncemented hemiarthroplasty have conflicting results. We conducted a randomized controlled trial to compare cemented and uncemented hemiarthroplasty. METHODS: This multicenter parallel-randomized controlled trial included patients of 70 years and older with a displaced femoral neck fracture (Garden type III or IV)...
April 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28431451/-experience-with-the-hind-foot-relaxation-boot
#3
Hans Zwipp, Michael Borrmann, Eberhard Walter
The goal of this paper is to report our experience with hindfoot fractures using our specially developed boot, with a follow-up of 557 cases. This boot works like the well-known Allgöwer-Röck ortheses (ARO), but is a hybrid between a boot and an orthesis. It allows full weightbearing without using crutches and completely protects an acutely operated hind foot fracture, hind foot arthrodesis or a hind foot fracture which is suitable for conservative treatment. In its first generation, this boot was custom made and used in 408 cases, from March 1999 to February 2011...
April 21, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28431409/outcomes-of-hemiarthroplasty-and-total-hip-arthroplasty-for-femoral-neck-fracture-a-medicare-cohort-study
#4
Zhong Wang, Timothy Bhattacharyya
OBJECTIVES: For patients with femoral neck fractures, total hip arthroplasty (THA) demonstrates superior outcomes compared with hemiarthroplasty. However, hemiarthroplasty remains a common treatment for femoral neck fractures and the conversion rates are unknown. We compared the results of the 2 procedures using a Medicare database. METHODS: We assembled a cohort of 70,242 patients 65 to 90 years of age with an ICD9 diagnosis and matching Current Procedure Terminology code for femoral neck fracture between 2008 and 2012...
May 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28430721/outcomes-of-reverse-total-shoulder-arthroplasty-for-proximal-humeral-fractures-primary-arthroplasty-versus-secondary-arthroplasty-following-failed-proximal-humeral-locking-plate-fixation
#5
Emilio Sebastia-Forcada, Alejandro Lizaur-Utrilla, Román Cebrian-Gomez, Francisco A Miralles-Muñoz, Fernando A Lopez-Prats
OBJECTIVE: To compare the outcomes of reverse shoulder arthroplasty (RSA) between patients with failed proximal humeral locking plate (PHLP) fixation and those with acute fractures. DESIGN: Matched case-control study. SETTING: University hospital, level I trauma center. PATIENTS: 30 consecutive patients with fracture sequelae due to failed PHLP fixation (mean age 73) were age- and gender-matched to 30 patients with acute fracture (mean age 75)...
April 6, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28430532/overcoming-discourse-linking-difficulties-in-aphasia-the-case-of-clitic-pronouns
#6
Silvia Martínez-Ferreiro, Andrés Felipe Reyes, Roelien Bastiaanse
The present study aims to contribute to the ongoing discussion about the impact of discourse-linking deficits on the performance of individuals with aphasia by providing new data from a set of rarely investigated constructions: sentences in which a clitic pronoun coexists alongside with the full DP it agrees with. To do so, we use data of individuals with non-fluent aphasias who need to overcome the difficulties in direct object (accusative) clitic production. This results in overproduction of non-target clitic right dislocations (RDs) and clitic doubling (CD)...
April 21, 2017: Clinical Linguistics & Phonetics
https://www.readbyqxmd.com/read/28430016/the-use-of-intravenous-lidocaine-for-the-management-of-acute-pain-secondary-to-traumatic-ankle-injury
#7
Billy Sin, Diana Gritsenko, Grace Tam, Kimberly Koop, Eva Mok
Sports-related injuries are a frequent cause of visits to the emergency department (ED) across the United States. A majority of these injuries affect the lower extremities with the ankle as the most frequently reported site. Most sports-related injuries are not severe enough to require inpatient hospitalization; however, they often lead to acute distress and pain which require prompt treatment with analgesics. Approximately 22% of patients who presented to the ED required pharmacotherapy for acute pain management...
January 1, 2017: Journal of Pharmacy Practice
https://www.readbyqxmd.com/read/28429759/dual-mechanisms-of-grain-refinement-in-a-fecocrni-high-entropy-alloy-processed-by-high-pressure-torsion
#8
Wenqian Wu, Min Song, Song Ni, Jingshi Wang, Yong Liu, Bin Liu, Xiaozhou Liao
An equiatomic FeCoCrNi high-entropy alloy with a face-centered cubic structure was fabricated by a powder metallurgy route, and then processed by high-pressure torsion. Detailed microscopy investigations revealed that grain refinement from coarse grains to nanocrystalline grains occurred mainly via concurrent nanoband (NB) subdivision and deformation twinning. NB-NB, twin-NB and twin-twin interactions contributed to the deformation process. The twin-twin interactions resulted in severe lattice distortion and accumulation of high densities of dislocations in the interaction areas...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429173/a-new-approach-to-local-dco-in-ankle-fracture-dislocations-external-fixation-with-diaphyseal-unicortical-screws-applied-by-local-anaesthesia
#9
F Lavini, T Maluta, G Carpeggiani, C Dall'Oca, E Samaila, G Marconato, B Magnan
PURPOSE: Ankle fracture dislocations represent a great threat for soft tissue viability and articular instability. The use of a temporary ankle bridging ExFix plays a fundamental role in the local damage control orthopaedics while waiting for definitive synthesis. METHODS: For this prospective research, we have developed a full application protocol of innovative diaphyseal monocortical screws fixator (Unyco-Orthofix(TM)) exclusively under local anaesthesia. Rigid selection criteria allowed us to collect nine patients during a period of almost 2 years...
April 20, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28427871/arthroscopic-assisted-coracoclavicular-ligament-reconstruction-for-acute-acromioclavicular-dislocation-using-2-clavicular-and-1-coracoid-cortical-fixation-buttons-with-suture-tapes
#10
Sang-Jin Shin, Yoon Sang Jeon, Rag Gyu Kim
PURPOSE: To introduce an arthroscopically assisted coracoclavicular (CC) fixation technique using a cortical fixation button device and to evaluate the clinical and radiologic outcomes in patients with acute acromioclavicular (AC) dislocation who were treated with the technique. METHODS: Twenty-one consecutive patients with grade III and V acute AC dislocation who underwent arthroscopically assisted CC ligament reconstruction using a cortical fixation button device were prospectively enrolled...
April 17, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28427385/differences-between-native-and-prosthetic-knees-in-terms-of-cross-sectional-morphology-of-the-femoral-trochlea-a-study-based-on-three-dimensional-models-and-virtual-total-knee-arthroplasty
#11
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, You Wang
BACKGROUND: The cross-sectional morphology of the prosthetic knee is crucial to understanding patellar motion and quadriceps strength after total knee arthroplasty. However, few comparative evaluations of the cross-sectional morphology of the femoral trochlea have been performed in the native knee and currently available femoral implants, and the relationship between the trochlear anatomy of prosthetic components and post-operative patellofemoral complications remains unclear. We aimed to investigate the differences in cross-sectional morphology of the femoral trochlea between native knees and prosthetic femoral components...
April 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28425552/the-effect-of-chemical-ordering-and-lattice-mismatch-on-structural-transitions-in-phase-segregating-nanoalloys
#12
Kevin Rossi, Francesca Baletto
We elucidate the effect of lattice mismatch and chemical ordering on structural transitions in bimetallic nanoalloys of ∼1.5 nm. We show that collective screw dislocation motions happen in small mismatch shell@core systems while strongly mismatched ones favour incomplete outer shell rearrangements. Cooperative transitions can also become hindered when the chemical ordering breaks the geometrical symmetry. Escaping from an unfavourable morphological basin occurs first via re-arrangements of the geometry and then changes towards a better chemical pattern...
April 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28424914/association-of-femoral-head-and-acetabular-fractures-on-computerized-tomography-correlation-with-the-judet-letournel-classification
#13
Nicholas M Beckmann, Naga R Chinapuvvula, Chunyan Cai
PURPOSE: Tha aims of this study were to identify the incidence of femoral head fractures in the setting of acetabular fractures and to determine the relationship between acetabular fracture pattern, the degree of acetabular fracture displacement, and the incidence of femoral head fractures. MATERIALS AND METHODS: This is a retrospective cross-sectional study of 274 patients with 300 acetabular fractures diagnosed on pelvic CT. Acetabular fractures were categorized using the Judet-Letournel classification system...
April 19, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28424885/bedside-repositioning-of-a-dislocated-avalon-cannula-in-a-running-veno-venous-ecmo
#14
Johannes Kalbhenn, Sven Maier, Sebastian Heinrich, Nils Schallner
We report a repositioning maneuver of a dislocated Avalon Elite dual lumen catheter during ongoing veno-venous ECMO support. The inferior tip of the catheter dislocated into a liver vein, which was accompanied by a dramatic decrease in pump flow. After standard repositioning maneuvers under transthoracic echocardiographic guidance had failed, a special guiding sheath was inserted into the main lumen through a Y-connector with a valve. Over this valve, a stiff wire could be placed into the inferior vena cava to help guiding the catheter back into the correct position...
April 19, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28423446/-dorsal-dislocation-of-the-os-trapezoideum-a-case-report
#15
Fabian Medved
No abstract text is available yet for this article.
February 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/28423410/analysis-of-dislocation-configurations-in-a-0-0-1-fcc-single-crystal-by-electron-channeling-contrast-imaging-in-the-sem
#16
Ivan Gutierrez-Urrutia
We have investigated the dislocation configurations in a [0 0 1] single crystal of a face-centered alloy (316L stainless steel) by the electron channeling contrast imaging (ECCI) technique in the scanning electron microscope under controlled diffraction conditions. Specific dislocations such as piled-up dislocations and Lomer-Cottrell dislocations were characterized by the analysis of dislocation contrast and dislocation line trace analysis. The ECCI technique also allows the sound estimation of the local resolved stress acting on gliding dislocations by the analysis of the radius of curvature following a transmission electron microscopy-based geometrical approach...
April 1, 2017: Microscopy
https://www.readbyqxmd.com/read/28421602/the-qualitative-f-ratio-method-applied-to-electron-channelling-induced-x-ray-imaging-with-an-annular-silicon-drift-detector-in-a-scanning-electron-microscope-in-the-transmission-mode
#17
Nicolas Brodusch, Raynald Gauvin
Electron channelling is known to affect the x-ray production when an accelerated electron beam is applied to a crystalline material and is highly dependent on the local crystal orientation. This effect, unless very long counting time are used, is barely noticeable on x-ray energy spectra recorded with conventional silicon drift detectors (SDD) located at a small elevation angle. However, the very high count rates provided by the new commercially available annular SDDs permit now to observe this effect routinely and may, in some circumstances, hide the true elemental x-ray variations due to the local true specimen composition...
April 18, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28420893/scoliosis-in-patients-with-severe-cerebral-palsy-three-different-courses-in-adolescents
#18
Yoshiaki Oda, Tomoyuki Takigawa, Yoshihisa Sugimoto, Masato Tanaka, Hirofumi Akazawa, Toshifumi Ozaki
Patients with cerebral palsy (CP) frequently present with scoliosis; however, the pattern of curve progression is difficult to predict. We aimed to clarify the natural course of the progression of scoliosis and to identify scoliosis predictors. This was a retrospective, single-center, observational study. Total of 92 CP patients from Asahikawasou Ryouiku Iryou Center in Okayama, Japan were retrospectively analyzed. Cobb angle, presence of hip dislocation and pelvic obliquity, and Gross Motor Function Classification System (GMFCS) were investigated...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28419886/total-hip-arthroplasty-for-patients-with-crowe-type-iv-developmental-dysplasia-of-the-hip-ten-years-results
#19
Wei-Nan Zeng, Jun-Li Liu, Fu-You Wang, Xin Zhang, Hua-Quan Fan, Guang-Xing Chen, Lin Guo, Xiao-Jun Duan, Qiang Zhou, Liu Yang
BACKGROUND AND OBJECTIVES: The aim of this study was to determine the rate of union, functional results and complications in patients with Crowe IV developmental dysplasia of the hip (DDH) who underwent cementless total hip arthroplasty (THA) with S-ROM prostheses and subtrochanteric transverse shortening osteotomy. METHODS: Forty-five patients (52 hips) operated between January 2005 and May 2008, with a mean age of 40.6 years at surgery were followed. The mean follow-up period was 9...
April 15, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28419034/complications-and-functional-outcomes-after-pantalar-dislocation
#20
Kaeleen A Boden, Douglas S Weinberg, Heather A Vallier
BACKGROUND: Pantalar dislocations without associated talar fracture are rare and have high risks of complications, including infection, osteonecrosis, and posttraumatic osteoarthrosis. Limited information on later function exists. This study evaluated complications and outcomes following pantalar dislocation without talar fracture. METHODS: Nineteen patients were identified with open (n = 14) or closed (n = 5) pantalar dislocations without talar fracture. Ten male and 9 female patients with a mean age of 39...
April 19, 2017: Journal of Bone and Joint Surgery. American Volume
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