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https://www.readbyqxmd.com/read/29223053/pressure-induced-phase-transition-and-fracture-in-%C3%AE-moo3-nanoribbons
#1
Jose V Silveira, Luciana L Vieira, Acrisio L Aguiar, Paulo T C Freire, Josue Mendes Filho, Oswaldo L Alves, Antonio G Souza Filho
MoO3 nanoribbons were studied under different pressure conditions ranging from 0 to 21GPa at room temperature. The effect of the applied pressure on the spectroscopic and morphologic properties of the MoO3 nanoribbons was investigated by means of Raman spectroscopy and scanning electron microscopy techniques. The pressure dependent Raman spectra of the MoO3 nanoribbons indicate that a structural phase transition occurs at 5GPa from the orthorhombic α-MoO3 phase (Pbnm) to the monoclinic MoO3-II phase (P21/m), which remains stable up to 21GPa...
November 27, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29222664/anatomical-reconstruction-to-treat-acromion-fractures-following-reverse-shoulder-arthroplasty
#2
Florian Hess, Ralph Zettl, Daniel Smolen, Christoph Knoth
PURPOSE: Scapular fractures after reverse shoulder arthroplasty (RSA) are often associated with substantial shoulder impairment. Patient outcomes following either conservative or operative treatment have not been favourable, and consensus is lacking on the best treatment approach. We describe a technique for anatomic reconstruction of fractured lateral and basal acromion in patients at higher risk for diminished function or those for which conservative treatment has already failed. METHODS: Of the 95 patients who underwent RSA at our institution between December 2013 and December 2016, three had post-operative acromion fractures (type II)...
December 8, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/29222631/an-advanced-simulator-for-orthopedic-surgical-training
#3
J Cecil, Avinash Gupta, Miguel Pirela-Cruz
PURPOSE: The purpose of creating the virtual reality (VR) simulator is to facilitate and supplement the training opportunities provided to orthopedic residents. The use of VR simulators has increased rapidly in the field of medical surgery for training purposes. This paper discusses the creation of the virtual surgical environment (VSE) for training residents in an orthopedic surgical process called less invasive stabilization system (LISS) surgery which is used to address fractures of the femur...
December 8, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29222607/static-and-fatigue-strength-of-a-novel-anatomically-contoured-implant-compared-to-five-current-open-wedge-high-tibial-osteotomy-plates
#4
Arnaud Diffo Kaze, Stefan Maas, James Belsey, Alexander Hoffmann, Dietrich Pape
BACKGROUND: The purpose of the present study was to compare the mechanical static and fatigue strength of the size 2 osteotomy plate "Activmotion" with the following five other common implants for the treatment of medial knee joint osteoarthritis: the TomoFix small stature, the TomoFix standard, the Contour Lock, the iBalance and the second generation PEEKPower. METHODS: Six fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy (HTO), according to standard techniques, using size 2 Activmotion osteotomy plates...
December 8, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29222581/fractures-in-children-with-newly-diagnosed-hepatoblastoma
#5
Alexander J Towbin, Fernanda D C Braojos Braga, Bin Zhang, James I Geller, Greg M Tiao, Daniel J Podberesky
BACKGROUND: Hepatoblastoma is the most common primary hepatic malignancy in children. We have recently noticed an increased incidence of unsuspected fractures in children with newly diagnosed hepatoblastoma. This association has been suggested in the past, but the incidence and pathophysiology remain uncertain. OBJECTIVE: To define the incidence and imaging features of fractures in children with newly diagnosed hepatoblastoma. MATERIALS AND METHODS: We searched the oncology database and the radiology picture archiving and communication system of our large tertiary care children's hospital between January 2000 and August 2013 for all patients who presented to our institution with newly diagnosed hepatoblastoma...
December 8, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29222322/inferior-vena-cava-filter-use-and-patient-safety-legacy-or-science
#6
REVIEW
William Geerts, Rita Selby
There has been a dramatic increase in vena cava filter (VCF) use over the past 20 years in the absence of evidence that filters provide a net patient benefit or are required in most cases. This increase is largely attributable to the availability of retrievable filters and expanded indications, particularly as primary prophylaxis in patients thought to be at high risk of pulmonary embolism. Substantial variability in VCF use, unrelated to patient clinical factors, has been shown between hospitals, from region to region, and among various countries...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222266/impact-of-bone-disease-and-pain-in-thalassemia
#7
REVIEW
Antonio Piga
Conventional treatment of thalassemia, namely regular blood transfusion and iron chelation, improves perspectives and quality of life; however, successful treatment leads to more time in which long-term complications such as bone disease can develop. Thalassemia bone disease (TBD) is unique: all aspects, from bone anatomy and bone quality to mineral density, may be affected, with important morbidity including osteoporosis, fractures, spinal deformities, nerve compression, and pain. Clinical presentations include growth impairment, rickets-like features, back pain, spinal deformities, any sign of nerve compression, severe osteoporosis, and fragility fractures...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222205/novel-use-of-a-trabecular-metal-spacer-in-the-treatment-of-a-long-standing-ulnar-fracture-non-union
#8
Oluwatobi O Onafowokan, Julian S H Gaskin, Rory G Middleton, Mark R Norton
The use of trabecular metal (TM) implants in spine and joint surgery is well documented. However, their use has yet to be reported as an alternative to either allograft or autograft in the management of fracture non-unions. We present our experience in using a TM implant for treating a patient with a long-standing ulnar fracture non-union. Excision of devitalised bone resulted in a 17 mm defect which the TM implant was used to infill. The defect was then bridged with a locking plate. At 2-year clinical and radiographic review, bony union and a pain-free return to full function was noted...
December 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29221945/the-relationship-of-physical-performance-and-osteoporosis-prevention-with-vitamin-d-in-older-african-americans-poda
#9
Ruban Dhaliwal, Mageda Mikhail, Gianina Usera, Alexandra Stolberg, Shahidul Islam, Louis Ragolia, John F Aloia
RATIONALE: Vitamin D deficiency is associated with bone loss, poor muscle strength, falls and fracture. This information in older African Americans (AAs) is sparse. OBJECTIVE: The study of the relationship of Physical performance, Osteoporosis prevention with vitamin D in older African Americans (PODA) is a randomized, double-blind, placebo-controlled 3-year trial examining the effect of vitamin D on bone loss and physical performance in older AA women. METHODS: 260 healthy AA women aged >60years were assigned to receive placebo or vitamin D3...
December 5, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/29221903/discrete-element-analysis-is-a-valid-method-for-computing-joint-contact-stress-in-the-hip-before-and-after-acetabular-fracture
#10
Kevin C Townsend, Holly D Thomas-Aitken, M James Rudert, Andrew M Kern, Michael C Willey, Donald D Anderson, Jessica E Goetz
Evaluation of abnormalities in joint contact stress that develop after inaccurate reduction of an acetabular fracture may provide a potential means for predicting the risk of developing post-traumatic osteoarthritis. Discrete element analysis (DEA) is a computational technique for calculating intra-articular contact stress distributions in a fraction of the time required to obtain the same information using the more commonly employed finite element analysis technique. The goal of this work was to validate the accuracy of DEA-computed contact stress against physical measurements of contact stress made in cadaveric hips using Tekscan sensors...
November 16, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29221839/cementless-one-stage-revision-in-chronic-periprosthetic-hip-joint-infection-ninety-one-percent-infection-free-survival-in-56-patients-at-minimum-2-year-follow-up
#11
Jeppe Lange, Anders Troelsen, Søren Solgaard, Kristian S Otte, Niels K Jensen, Kjeld Søballe
BACKGROUND: Cementless 1-stage revision in chronic periprosthetic hip joint infections is limited evaluated. The purpose of this study was to evaluate a specific treatment protocol in this patient group. METHODS: The study was performed as a multicenter, proof-of-concept, observational study with prospective data collection. Patients were treated with a cementless 1-stage revision according to the CORIHA protocol between 2009 and 2014. Fifty-six patients, McPherson type III-A/B-1/2, were enrolled with a mean follow-up time from the CORIHA procedure of 4 years (minimum of 2 years)...
November 22, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29221814/use-of-interventional-radiology-as-initial-hemorrhage-control-to-improve-outcomes-for-potentially-lethal-multiple-blunt-injuries
#12
Hiroyuki Otsuka, Toshiki Sato, Keiji Sakurai, Hiromichi Aoki, Takeshi Yamagiwa, Shinichi Iizuka, Sadaki Inokuchi
INTRODUCTION: Recently, trauma management has been markedly improved with interventional radiology (IVR) and damage-control strategies. However, the indications for its use in hemodynamically unstable patients with severe trauma remains unclear. In some cases, IVR may be more effective than surgery for damage-control hemostasis; however, performing IVR in life-threatening trauma settings is challenging. To address this, we practiced and evaluated a trauma-management system with emergency physicians who trained for both severe trauma management, and techniques of surgery and IVR...
December 6, 2017: Injury
https://www.readbyqxmd.com/read/29221656/z-effect-after-intramedullary-nailing-systems-for-trochanteric-femur-fractures
#13
S J M Smeets, G Kuijt, P V van Eerten
PURPOSE: The aim of this study was to investigate the incidence of Z-effect after dual lag screw intramedullary nailing systems and risk factors contributing to this effect. We hypothesized that long nails provide more neck strength due to a longer lever than short nails and are therefore less likely to develop a misbalance of a higher head compressive strength than neck compressive strength. METHODS: In this retrospective cohort study 103 patients treated operatively with a dual lag screw intramedullary nailing device for (sub)trochanteric hip fracture were included...
September 27, 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/29221576/an-important-lesson-in-assessing-neurovascular-involvement-in-proximal-humeral-fractures-the-presence-of-neuropathic-pain-in-a-dysvascular-limb
#14
Ashok K Singh, William Rudge, Tom Quick
No abstract text is available yet for this article.
January 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29221479/in-screw-polymethylmethacrylate-augmented-sacroiliac-screw-for-the-treatment-of-fragility-fractures-of-the-pelvis-a-prospective-observational-study-with-1-year-follow-up
#15
Andreas Höch, Philipp Pieroh, Ralf Henkelmann, Christoph Josten, Jörg Böhme
BACKGROUND: The incidence of pelvic ring fractures in the elderly significantly increased. Because of persistent pain and immobilization associated with this injury, surgical treatment is recommended. To minimise comorbidities and surgical risk, percutaneous techniques are becoming more relevant. In-screw cement augmentation of sacroiliac screw fixation is a promising procedure; however, clinical follow-up data remain scarce. This study investigated the safety and possible complications of the procedure along with a 1-year follow-up...
December 8, 2017: BMC Surgery
https://www.readbyqxmd.com/read/29221466/unusual-pathological-fracture-of-the-clavicle-revealing-primary-hyperparathyroidism-a-case-report
#16
Yassir Benameur, Hasnae Guerrouj, Imad Ghfir, Nouzha Ben Rais Aouad
BACKGROUND: Primary hyperparathyroidism revealed by a pathological fracture is very uncommon; in the majority of cases the discovery of lytic bone lesions on imaging examinations evokes in the clinician first a neoplastic etiology and a metabolic origin is often omitted. This case report adds to the existing literature as it describes an unusual presentation of primary hyperparathyroidism. CASE PRESENTATION: We report a case of a 50-year-old Moroccan man, without any known tumor, who presented a fracture of his left clavicle with multiple osteolytic lesions on computed tomography suggesting bone metastases...
December 9, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29221300/comparison-of-continuous-compression-with-regular-ventilations-versus-30-2-compressions-ventilations-strategy-during-mechanical-cardiopulmonary-resuscitation-in-a-porcine-model-of-cardiac-arrest
#17
Zhengfei Yang, Qingyu Liu, Guanghui Zheng, Zhifeng Liu, Longyuan Jiang, Qing Lin, Rui Chen, Wanchun Tang
Background: A compression-ventilation (C:V) ratio of 30:2 is recommended for adult cardiopulmonary resuscitation (CPR) by the current American Heart Association (AHA) guidelines. However, continuous chest compression (CCC) is an alternative strategy for CPR that minimizes interruption especially when an advanced airway exists. In this study, we investigated the effects of 30:2 mechanical CPR when compared with CCC in combination with regular ventilation in a porcine model. Methods: Sixteen male domestic pigs weighing 39±2 kg were utilized...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29220763/concentration-and-spectroscopic-characteristics-of-dom-in-surface-runoff-and-fracture-flow-in-a-cropland-plot-of-a-loamy-soil
#18
Qingsong Xian, Penghui Li, Chen Liu, Junfang Cui, Zhuo Guan, Xiangyu Tang
Being crucial for predicting the impact of source inputs on a watershed in rainfall events, an understanding of the dynamics and characteristics of dissolved organic matter (DOM) export from the soil under particular land use types, particularly those associated with underground flows is still largely lacking. A field study was carried out using a 1500m2 slope farmland plot in the hilly area of Sichuan Basin, Southwest China. The discharge of surface runoff and fracture flow was recorded and samples were collected in four representative rainfall events...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29220761/climate-change-potential-effects-on-the-hydrological-regime-of-freshwater-springs-in-the-italian-northern-apennines
#19
Federico Cervi, Francesca Petronici, Attilio Castellarin, Marco Marcaccio, Andrea Bertolini, Lisa Borgatti
In large areas of the Italian Northern Apennines, hundreds of low-yield springs provide water for drinking and industrial purposes, with short groundwater flow paths being formed within fractured sedimentary rock units. This hydrogeological setting results in spring water discharges that closely follow meteoric water recharge patterns, leading to low-flow periods concentrated in the summer/early autumn. Therefore, the springs' outflow can be very sensitive to a shortage in water recharge, as it was the case in 2003 and 2017, when a prolonged period of drought caused severe water management issues...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29220072/falls-predict-fractures-independently-of-frax-probability-a-meta-analysis-of-the-osteoporotic-fractures-in-men-mros-study
#20
Nicholas C Harvey, Anders Odén, Eric Orwoll, Jodi Lapidus, Timothy Kwok, Magnus K Karlsson, Björn E Rosengren, Östen Ljunggren, Cyrus Cooper, Eugene McCloskey, John A Kanis, Claes Ohlsson, Dan Mellström, Helena Johansson
Although prior falls are a well-established predictor of future fracture, there is currently limited evidence regarding the specific value of falls history in fracture risk assessment relative to that of other clinical risk factors and bone mineral density (BMD) measurement. We therefore investigated, across the three Osteoporotic Fractures in Men (MrOS) Study cohorts, whether past falls predicted future fracture independently of FRAX and whether these associations varied with age and follow-up time. Elderly men were recruited from MrOS Sweden, Hong Kong, and USA...
December 8, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
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