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https://www.readbyqxmd.com/read/28300359/influence-of-different-boundary-conditions-in-finite-element-analysis-on-pelvic-biomechanical-load-transmission
#1
Pan Hu, Tao Wu, Hui-Zhi Wang, Xin-Zheng Qi, Jie Yao, Xiao-Dong Cheng, Wei Chen, Ying-Ze Zhang
OBJECTIVE: To observe the effects of boundary conditions and connect conditions on biomechanics predictions in finite element (FE) pelvic models. METHODS: Three FE pelvic models were constructed to analyze the effect of boundary conditions and connect conditions in the hip joint: an intact pelvic model assumed contact of the hip joint on both sides (Model I); and a pelvic model assumed the hip joint connecting surfaces fused together with (Model II) or without proximal femurs (Model III)...
March 16, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28268891/hybrid-bci-approach-to-control-an-artificial-tibio-femoral-joint
#2
Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz
Brain-Computer Interfaces (BCIs) for disabled people should allow them to use their remaining functionalities as control possibilities. BCIs connect the brain with external devices to perform the volition or intent of movement, regardless if that individual is unable to perform the task due to body impairments. In this work we fuse electromyographic (EMG) with electroencephalographic (EEG) activity in a framework called "Hybrid-BCI" (hBCI) approach to control the movement of a simulated tibio-femoral joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28241536/determination-of-the-refractive-index-and-thickness-of-a-hydroxide-catalysis-bond-between-fused-silica-from-reflectivity-measurements
#3
V Mangano, A A van Veggel, R Douglas, J Faller, A Grant, J Hough, S Rowan
Hydroxide-catalysis bonding is a high precision jointing technique producing strong, transparent and thin bonds, the use of which in the delicate fused silica mirror suspensions of aLIGO have been instrumental in the first detections of gravitational radiation. More sensitive future gravitational wave detectors will require more accurate (ideally in situ) measurements of properties such as bond thickness. Here a non-destructive technique is presented in which the thickness and refractive index of a bond are determined from measurements of optical reflectivity...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28237928/robust-multi-exposure-image-fusion-a-structural-patch-decomposition-approach
#4
Kede Ma, Hui Li, Hongwei Yong, Zhou Wang, Deyu Meng, Lei Zhang
We propose a simple yet effective structural patch decomposition (SPD) approach for multi-exposure image fusion (MEF) that is robust to ghosting effect. We decompose an image patch into three conceptually independent components: signal strength, signal structure, and mean intensity. Upon fusing these three components separately, we reconstruct a desired patch and place it back into the fused image. This novel patch decomposition approach benefits MEF in many aspects. First, as opposed to most pixel-wise MEF methods, the proposed algorithm does not require post-processing steps to improve visual quality or to reduce spatial artifacts...
February 20, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28227091/hybrid-bci-approach-to-control-an-artificial-tibio-femoral-joint
#5
Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz, Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz, Luis Mercado, Angel Rodriguez-Linan, Luis M Torres-Trevino, G Quiroz
Brain-Computer Interfaces (BCIs) for disabled people should allow them to use their remaining functionalities as control possibilities. BCIs connect the brain with external devices to perform the volition or intent of movement, regardless if that individual is unable to perform the task due to body impairments. In this work we fuse electromyographic (EMG) with electroencephalographic (EEG) activity in a framework called "Hybrid-BCI" (hBCI) approach to control the movement of a simulated tibio-femoral joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28211998/nanojoint-formation-between-ceramic-titanate-nanowires-and-spot-melting-of-metal-nanowires-with-electron-beam
#6
Arixin Bo, Jose Alarco, Huaiyong Zhu, Eric R Waclawik, Haifei Zhan, YuanTong Gu
Construction of nanoarchitectures requires techniques like joint formation and trimming. For ceramic materials, however, it is extremely difficult to form nanojoints by conventional methods like merging. In this work, we demonstrate that ceramic titanate nanowires (NWs) can be joined by spot melting under electron beam (e-beam) irradiation (EBI). The irradiation fuses the contacted spot of titanate NWs yielding an intact nanojoint. Nanojoints with different morphologies can be produced. The joint structures consist of titanium dioxide (TiO2) rutile, anatase, and titanate phases in the direction away from the e-beam melting spot...
March 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28167061/chopart-injuries-when-to-fix-and-when-to-fuse
#7
REVIEW
Stefan Rammelt, Tim Schepers
Chopart joint injuries have a profound effect on global foot function. Surgical treatment aims at joint reconstruction and axial alignment with restoration of the normal relationship of the lateral and medial foot columns. Internal fixation is tailored to the individual fracture pattern and achieved with resorbable pins, Kirschner wires, screws, and/or anatomically shaped minifragment plates. If instability persists, temporary joint transfixation may be achieved with Kirschner wires or bridge plating. Primary fusion sacrifices essential joints and should be reserved for severe initial cartilage damage...
March 2017: Foot and Ankle Clinics
https://www.readbyqxmd.com/read/28148666/custom-made-total-ankle-arthroplasty-for-the-salvage-of-major-talar-bone-loss
#8
J Wagener, C E Gross, C Schweizer, T Horn Lang, B Hintermann
AIMS: A failed total ankle arthroplasty (TAA) is often associated with much bone loss. As an alternative to arthrodesis, the surgeon may consider a custom-made talar component to compensate for the bone loss. Our aim in this study was to assess the functional and radiological outcome after the use of such a component at mid- to long-term follow-up. PATIENTS AND METHODS: A total of 12 patients (five women and seven men, mean age 53 years; 36 to77) with a failed TAA and a large talar defect underwent a revision procedure using a custom-made talar component...
February 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28126356/efficacy-comparison-of-accell-evo3%C3%A2-and-grafton%C3%A2-demineralized-bone-matrix-putties-against-autologous-bone-in-a-rat-posterolateral-spine-fusion-model
#9
Antonio T Brecevich, Paul D Kiely, B Victor Yoon, Joseph T Nguyen, Frank P Cammisa, Celeste Abjornson
BACKGROUND CONTEXT: Spinal fusion procedures are intended to stabilize the spinal column for a multitude of disorders including abnormal curvature, traumatic instability, degenerative instability, and damage from infections or tumors. As an aid in the bone healing response, bone graft materials are utilized to bridge joints for arthrodesis and promote unions in pseudoarthrosis. Currently, the gold standard for stabilizing fusion masses in spinal procedures involves utilizing the osteogenic, osteoinductive, and osteoconductive properties of autologous iliac crest cortico-cancellous bone...
January 23, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28124107/the-interaction-between-the-vastus-medialis-and-vastus-intermedius-and-its-influence-on-the-extensor-apparatus-of-the-knee-joint
#10
Karl Grob, Mirjana Manestar, Luis Filgueira, Markus S Kuster, Helen Gilbey, Timothy Ackland
PURPOSE: Although the vastus medialis (VM) is closely associated with the vastus intermedius (VI), there is a lack of data regarding their functional relationship. The purpose of this study was to investigate the anatomical interaction between the VM and VI with regard to their origins, insertions, innervation and function within the extensor apparatus of the knee joint. METHODS: Eighteen human cadaveric lower limbs were investigated using macro-dissection techniques...
January 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28113782/cancer-subtype-discovery-based-on-integrative-model-of-multigenomic-data
#11
Shu-Guang Ge, Junfeng Xia, Wen Sha, Chun-Hou Zheng
One major goal of large-scale cancer omics study is to understand molecular mechanisms of cancer and find new biomedical targets. To deal with the high-dimensional multidimensional cancer omics data (DNA methylation, mRNA expression, etc.), which can be used to discover new insight on identifying cancer subtypes, clustering methods are usually used to find an effective low-dimensional subspace of the original data and then cluster cancer samples in the reduced subspace. However, due to data-type diversity and big data volume, few methods can integrate these data and map them into an effective low-dimensional subspace...
October 26, 2016: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/28097823/excess-retinoic-acid-induces-fusion-of-centra-by-degenerating-intervertebral-ligament-cells-in-japanese-flounder-paralichthys-olivaceus
#12
Xiaoming Wu, Qiran Chen, Youhei Washio, Hayato Yokoi, Tohru Suzuki
In marine aquaculture fish, excessive supplement of vitamin A (VA) to zooplanktons for larval culture and experimental exposure of larvae to retinoic acid (RA: active form of VA) have been known to cause vertebral deformity. However, the tissues in the developing vertebral column that are affected by RA and the progression of vertebral deformity remain undetermined. To examine these questions, we histologically traced the progress of vertebral deformity induced by RA in Japanese flounder (Paralichthys olivaceus)...
January 18, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28091426/mri-based-detailed-evaluation-of-the-anatomy-of-the-human-coccyx-among-turkish-adults
#13
H Tetiker, M I Koşar, N Çullu, U Canbek, I Otağ, Y Taştemur
AIM: The human coccyx varies considerably in shape and size. The objective of this study was to investigate the morphology and morphometry of the coccyx on pelvic magnetic resonance imaging in asymptomatic individuals among Turkish adults. MATERIALS AND METHODS: This study was conducted retrospectively on the pelvic magnetic resonance images of 456 adult patients without a history of trauma in the coccyx region. The coccygeal vertebrae count, number of bone segments, and intercoccygeal and sacrococcygeal joint fusions were determined from the sagittal plane images...
February 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28071847/hindfoot-fusion-in-haemophilic-arthropathy-6-year-mean-follow-up-of-41-procedures-performed-in-28-adult-patients
#14
M Brkljac, S Shah, C Hay, E C Rodriguez-Merchan
INTRODUCTION: Haemophilic arthropathy of the ankle is rare disorder caused by recurrent haemarthorses beginning in early adulthood. AIM: Our aim was to evaluate the fusion rate of various techniques of hindfoot fusion using internal fixation for the treatment of haemophilic arthropathy of the hindfoot. METHODS: We have evaluated the fusion rate of various techniques of hindfoot (tibiotalar and subtalar joints) fusion for the treatment of haemophilic arthropathy of the hindfoot...
March 2016: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28069162/a-constrained-extended-kalman-filter-for-the-optimal-estimate-of-kinematics-and-kinetics-of-a-sagittal-symmetric-exercise
#15
V Bonnet, R Dumas, A Cappozzo, V Joukov, G Daune, D Kulić, P Fraisse, S Andary, G Venture
This paper presents a method for real-time estimation of the kinematics and kinetics of a human body performing a sagittal symmetric motor task, which would minimize the impact of the stereophotogrammetric soft tissue artefacts (STA). The method is based on a bi-dimensional mechanical model of the locomotor apparatus the state variables of which (joint angles, velocities and accelerations, and the segments lengths and inertial parameters) are estimated by a constrained extended Kalman filter (CEKF) that fuses input information made of both stereophotogrammetric and dynamometric measurement data...
December 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28065978/spontaneous-bilateral-quadriceps-rupture-in-a-patient-with-ankylosing-spondylitis-a-case-report
#16
Azib Shahid, Hafiz Shahid Mushtaq, Syed Muhammad Azfar
Ankylosing spondylitis is a prototype rheumatoid factor-negative spondyloarthropathy that causes the vertebrae to fuse making the spine less flexible, resulting in a hunched-forward posture. A 47-year-old male who was a known case of ankylosing spondylitis presented with left quadriceps rupture after raising his right foot to lightly hit a football. He was fitted with a knee immobilizer as an emergency measure. The extent of the rupture was not yet established when patient requested leave to go home. The right quadriceps was ruptured as well when he took his immobilizer off to go the bathroom...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28042117/spinopelvic-mobility-and-acetabular-component-position-for-total-hip-arthroplasty
#17
M Stefl, W Lundergan, N Heckmann, B McKnight, H Ike, R Murgai, L D Dorr
AIMS: Posterior tilt of the pelvis with sitting provides biological acetabular opening. Our goal was to study the post-operative interaction of skeletal mobility and sagittal acetabular component position. MATERIALS AND METHODS: This was a radiographic study of 160 hips (151 patients) who prospectively had lateral spinopelvic hip radiographs for skeletal and implant measurements. Intra-operative acetabular component position was determined according to the pre-operative spinal mobility...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28033151/spinal-realignment-for-adult-deformity-three-column-osteotomies-alter-total-hip-acetabular-component-positioning
#18
Jeffrey J Barry, Altug Yucekul, Alexander A Theologis, Erik N Hansen, Christopher Ames, Vedat Deviren
INTRODUCTION: A goal of adult spinal deformity surgery is correction of sagittal imbalance by increasing lumbar lordosis (LL), allowing a previously retroverted pelvis to normalize as evidenced by decreases in pelvic tilt (PT). Realignment of pelvic orientation may alter the position of preexisting total hip arthroplasties (THAs). METHODS: Twenty-seven patients with unilateral THA who underwent thoracolumbar fusions for adult spinal deformity from the pelvis to L1 or above were retrospectively reviewed (levels fused, 10...
February 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/27989703/usefulness-of-mri-cbct-image-registration-in-the-evaluation-of-temporomandibular-joint-internal-derangement-by-novice-examiners
#19
Mohammed A Q Al-Saleh, Noura Alsufyani, Hollis Lai, Manuel Lagravere, Jacob L Jaremko, Paul W Major
OBJECTIVE: To assess whether novice examiners can more reliably determine temporomandibular joint (TMJ) disk derangements with the use of fused images of magnetic resonance imaging and cone beam computed tomography (MRI-CBCT) compared with MRI images alone. STUDY DESIGN: Thirty dental students with minimal exposure to TMJ imaging received a 30-minute calibration session in which TMJ diagnostic imaging and the normal anatomy of the TMJ internal derangement were explained...
February 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/27988873/coagulation-factor-ix-recombinant-albumin-fusion-protein-albutrepenonacog-alfa-idelvion-%C3%A2-a-review-of-its-use-in-haemophilia-b
#20
Katherine A Lyseng-Williamson
Albutrepenonacog alfa (Idelvion(®)), a fusion protein that genetically fuses recombinant factor IX (rFIX) with recombinant human albumin (rAlbumin), is indicated in the treatment of haemophilia B. This narrative review discusses the pharmacological properties and clinical data related to the use of this novel fusion protein, hereafter referred to as rIX-FP. The fusion of rFIX to rAlbumin prolongs the elimination half-life of rIX-FP in the circulation, allowing routine prophylaxis to be administered once every 7-14 days...
December 17, 2016: Drugs
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