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https://www.readbyqxmd.com/read/29352685/factors-associated-with-posterior-cruciate-ligament-tightness-during-cruciate-retaining-total-knee-arthroplasty
#1
Kazuhisa Hatayama, Masanori Terauchi, Shogo Hashimoto, Kenichi Saito, Hiroshi Higuchi
BACKGROUND: The purpose of our study was to identify factors affecting posterior cruciate ligament (PCL) tightness during cruciate-retaining total knee arthroplasty. METHODS: A total of 225 varus osteoarthritic knees that underwent cruciate-retaining total knee arthroplasty were included in this study. When the flexion gap was tighter than the extension gap after all bone resection and the lift-off sign was positive during surgery, the PCL was released. The association between PCL release and potential risk factors, such as age, gender, body mass index, preoperative range of motion, anterior cruciate ligament status, preoperative hip-knee-ankle angle (HKA), decrease in posterior condylar offset, and also change in tibial posterior slope angle (TPSA) from preoperative to postoperative measurement, was evaluated by univariate and multivariate logistic regression analyses...
December 28, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29352333/long-term-results-of-custom-cementless-stem-total-hip-arthroplasty-performed-in-hip-fusion
#2
Xavier Flecher, Matthieu Ollivier, Pascal Maman, Sébastien Pesenti, Sébastien Parratte, Jean-Noël Argenson
INTRODUCTION: Due to complex anatomical considerations, results of cementless-stem total hip arthroplasty (THA) in hip fusion remain controversial compared with conventional THA. We therefore aimed to analyse 3D anatomy of the fused hip based on pre-operative computed tomography (CT) scans, functional outcomes based on the Harris Hip Score (HHS) and the Hip Disability and Osteoarthritis Outcome Score (HOOS), modifications of hip anatomy based on post-operative standardised radiography, and determine complication rate and long-term survival based on Kaplan-Meier analysis...
January 19, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29351510/scapular-focused-interventions-to-improve-shoulder-pain-and-function-in-adults-with-subacromial-pain-a-systematic-review-and-meta-analysis
#3
Hiroki Saito, Meg E Harrold, Vinicius Cavalheri, Leanda McKenna
The relationship between subacromial pain syndrome (SAPS) and altered scapular movement has been previously reported. The purpose of this review was to determine the effect of interventions that focus on addressing scapular components to improve shoulder pain, function, shoulder range of motion (ROM), and muscle strength in adults with SAPS. Databases searched in September 2016 were: PubMed, the Cochrane Central Register of Controlled Trials [Central], EMBASE [via Ovid] and PEDro. All studies selected for this review were randomized controlled trials...
January 19, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29351276/static-length-changes-of-cochlear-outer-hair-cells-can-tune-low-frequency-hearing
#4
Nikola Ciganović, Rebecca L Warren, Batu Keçeli, Stefan Jacob, Anders Fridberger, Tobias Reichenbach
The cochlea not only transduces sound-induced vibration into neural spikes, it also amplifies weak sound to boost its detection. Actuators of this active process are sensory outer hair cells in the organ of Corti, whereas the inner hair cells transduce the resulting motion into electric signals that propagate via the auditory nerve to the brain. However, how the outer hair cells modulate the stimulus to the inner hair cells remains unclear. Here, we combine theoretical modeling and experimental measurements near the cochlear apex to study the way in which length changes of the outer hair cells deform the organ of Corti...
January 19, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29351268/use-of-different-methods-of-intramedullary-nailing-for-fixation-of-distal-radius-fractures-a-retrospective-analysis-of-clinical-and-radiological-outcomes
#5
Murat Çalbıyık, Deniz Ipek
BACKGROUND We aimed to evaluate the clinical and radiologic outcomes of using Sonoma WRx versus Micronail intramedullary nailing for the fixation of distal radius fractures. MATERIAL AND METHODS A total of 68 patients with primarily extra-articular and simple intra-articular fractures of the distal radius who underwent intramedullary distal radius fixation using Sonoma WRx (n=39) or Micronail (n=29) intramedullary nails were enrolled in the study. The clinical outcome measures included the range of motion (ROM), visual analog scale (VAS), functional outcomes (patient-reported Disabilities of the Arm, Shoulder and Hand [DASH] score and clinician-based Gartland-Werley score), radiographic scores (Stewart score), and parameters related to the quality of radiographic reduction and complications (radial inclination, volar tilt, radial height, and radio-ulnar variance)...
January 19, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29351262/imu-to-segment-assignment-and-orientation-alignment-for-the-lower-body-using-deep-learning
#6
Tobias Zimmermann, Bertram Taetz, Gabriele Bleser
Human body motion analysis based on wearable inertial measurement units (IMUs) receives a lot of attention from both the research community and the and industrial community. This is due to the significant role in, for instance, mobile health systems, sports and human computer interaction. In sensor based activity recognition, one of the major issues for obtaining reliable results is the sensor placement/assignment on the body. For inertial motion capture (joint kinematics estimation) and analysis, the IMU-to-segment (I2S) assignment and alignment are central issues to obtain biomechanical joint angles...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29350955/rate-dependence-of-elementary-rearrangements-and-spatiotemporal-correlations-in-the-3d-flow-of-soft-solids
#7
Vishwas V Vasisht, Sudeep K Dutta, Emanuela Del Gado, Daniel L Blair
We use a combination of confocal microscopy, rheology, and molecular dynamics simulations to investigate jammed emulsions under shear, by analyzing the 3D droplets rearrangements in the shear frame. Our quantitative analysis of local dynamics reveals elementary nonaffine rearrangements that underlie the onset of the flow at small strains. We find that the mechanism of unjamming and the upturn in the material flow curve are associated to a qualitative change in spatiotemporal correlations of such rearrangements with the applied shear rate...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350555/outcomes-of-latarjet-procedure-compared-with-bankart-repair-for-recurrent-traumatic-anterior-shoulder-instability
#8
Kellie C Huxel Bliven, Gail P Parr
Reference/Citation:  An VV, Sivakumar BS, Phan K, Trantalis J. A systematic review and meta-analysis of clinical and patient-reported outcomes following two procedures for recurrent traumatic anterior instability of the shoulder: Latarjet procedure vs. Bankart repair. J Shoulder Elbow Surg. 2016;25(5):853-863. CLINICAL QUESTION:   Are clinical and patient-reported outcomes different between the Latarjet and Bankart repair stabilization procedures when performed for recurrent traumatic anterior shoulder instability? DATA SOURCES:   Ovid MEDLINE, PubMed, Cochrane databases, American College of Physicians Journal Club, and Database of Abstracts of Review of Effectiveness were searched up to June 2015...
January 19, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29350007/-the-metabolic-profilings-study-of-serum-and-spinal-cord-from-acute-spinal-cord-injury-rats-%C3%A2-h-nmr-spectroscopy
#9
Hua-Hui Hu, Xiao-Long Huang, Ren-Fu Quan, Zong-Bao Yang, Jing-Jing Xu
OBJECTIVE: To establish the rat model of acute spinal cord injury, followed by aprimary study on this model with ¹H NMR based on metabonomics and to explore the metabonomics and biomarkers of spinal cord injury rat. METHODS: Twenty eight-week-old adult male SD rats of clean grade, with body weight of (200±10) g, were divided into sham operation group and model group in accordance with the law of random numbers, and every group had 10 rats. The rats of sham operation group were operated without damaging the spinal cord, and rats of model group were made an animal model of spinal cord incomplete injury according to the modified Allen's method...
February 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349976/-analysis-on-the-arthroscopy-efficacy-with-different-irrigation-times-for-the-treatment-of-suppurative-knee-arthritis-in-elder-patients
#10
Yi Yuan, Hai-Jun Zhang, Bo Zhang, Hao Luo, Chao Yang
OBJECTIVE: To evaluate the curative effect of arthroscopy-assisted irrigation with different times for the treatment of suppurative knee arthritis in elder patients. METHODS: From October 2012 to October 2014, 23 old patients with suppurative knee arthritis were treated with arthroscopic debridement and continuous irrigation. All the patients were randomly divided into two groups:one-week irrigation group (10 cases) and two-week irrigation group(13 cases). The ESR, CRP, recovery time of knee skin temperature, joint rang of motion and knee function were observed to evaluate the therapeutic effects...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349544/interpretation-of-motion-analysis-of-laparoscopic-instruments-based-on-principal-component-analysis-in-box-trainer-settings
#11
Ignacio Oropesa, Fernando Pérez Escamirosa, Juan A Sánchez-Margallo, Silvia Enciso, Borja Rodríguez-Vila, Arturo Minor Martínez, Francisco M Sánchez-Margallo, Enrique J Gómez, Patricia Sánchez-González
BACKGROUND: Motion analysis parameters (MAPs) have been extensively validated for assessment of minimally invasive surgical skills. However, there are discrepancies on how specific MAPs, tasks, and skills match with each other, reflecting that motion analysis cannot be generalized independently of the learning outcomes of a task. Additionally, there is a lack of knowledge on the meaning of motion analysis in terms of surgical skills, making difficult the provision of meaningful, didactic feedback...
January 18, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29349503/is-there-any-difference-between-open-and-arthroscopic-treatment-for-osteochondritis-dissecans-ocd-of-the-humeral-capitellum-a-systematic-review-and-meta-analysis
#12
Yi Lu, Yi Jun Li, Si Yi Guo, Hai Long Zhang
PURPOSE: We present a systematic review of the recent literatures regarding the arthroscopic and open technique in fragment fixation for osteochondritis dissecans (OCD) of the humeral capitellum and an analysis of the subjective and objective outcomes between these two procedures. METHODS: PubMed and EMBASE were reviewed for suitable articles relating to fragment fixation for OCD, both open and arthroscopic. We included all studies reporting on the clinical outcomes of these two procedures that were published in the English language...
January 18, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29347787/direct-determination-approach-for-the-multifractal-detrending-moving-average-analysis
#13
Hai-Chuan Xu, Gao-Feng Gu, Wei-Xing Zhou
In the canonical framework, we propose an alternative approach for the multifractal analysis based on the detrending moving average method (MF-DMA). We define a canonical measure such that the multifractal mass exponent τ(q) is related to the partition function and the multifractal spectrum f(α) can be directly determined. The performances of the direct determination approach and the traditional approach of the MF-DMA are compared based on three synthetic multifractal and monofractal measures generated from the one-dimensional p-model, the two-dimensional p-model, and the fractional Brownian motions...
November 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347765/laser-excited-motion-of-liquid-crystals-confined-in-a-microsized-volume-with-a-free-surface
#14
A V Zakharov, P V Maslennikov
The thermally excited vortical flow in a microsized liquid crystal (LC) volume with a free LC-air interface has been investigated theoretically based on the nonlinear extension of the Ericksen-Leslie theory, with accounting the entropy balance equation. Analysis of the numerical results show that due to interaction between the gradients of the director field ∇n[over ̂] and temperature field ∇T, caused by the focused heating, the thermally excited vortical fluid flow is maintained in the vicinity of the heat source...
November 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347549/multiscale-permutation-entropy-analysis-of-laser-beam-wandering-in-isotropic-turbulence
#15
Felipe Olivares, Luciano Zunino, Damián Gulich, Darío G Pérez, Osvaldo A Rosso
We have experimentally quantified the temporal structural diversity from the coordinate fluctuations of a laser beam propagating through isotropic optical turbulence. The main focus here is on the characterization of the long-range correlations in the wandering of a thin Gaussian laser beam over a screen after propagating through a turbulent medium. To fulfill this goal, a laboratory-controlled experiment was conducted in which coordinate fluctuations of the laser beam were recorded at a sufficiently high sampling rate for a wide range of turbulent conditions...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347533/model-of-chromosomal-loci-dynamics-in-bacteria-as-fractional-diffusion-with-intermittent-transport
#16
Marco Gherardi, Ludovico Calabrese, Mikhail Tamm, Marco Cosentino Lagomarsino
The short-time dynamics of bacterial chromosomal loci is a mixture of subdiffusive and active motion, in the form of rapid relocations with near-ballistic dynamics. While previous work has shown that such rapid motions are ubiquitous, we still have little grasp on their physical nature, and no positive model is available that describes them. Here, we propose a minimal theoretical model for loci movements as a fractional Brownian motion subject to a constant but intermittent driving force, and compare simulations and analytical calculations to data from high-resolution dynamic tracking in E...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347414/dynamical-density-functional-theory-analysis-of-the-laning-instability-in-sheared-soft-matter
#17
A Scacchi, A J Archer, J M Brader
Using dynamical density functional theory (DDFT) methods we investigate the laning instability of a sheared colloidal suspension. The nonequilibrium ordering at the laning transition is driven by nonaffine particle motion arising from interparticle interactions. Starting from a DDFT which incorporates the nonaffine motion, we perform a linear stability analysis that enables identification of the regions of parameter space where lanes form. We illustrate our general approach by applying it to a simple one-component fluid of soft penetrable particles...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347391/search-efficiency-of-biased-migration-towards-stationary-or-moving-targets-in-heterogeneously-structured-environments
#18
Youness Azimzade, Alireza Mashaghi
Efficient search acts as a strong selective force in biological systems ranging from cellular populations to predator-prey systems. The search processes commonly involve finding a stationary or mobile target within a heterogeneously structured environment where obstacles limit migration. An open generic question is whether random or directionally biased motions or a combination of both provide an optimal search efficiency and how that depends on the motility and density of targets and obstacles. To address this question, we develop a simple model that involves a random walker searching for its targets in a heterogeneous medium of bond percolation square lattice and used mean first passage time (〈T〉) as an indication of average search time...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347319/electromagnetic-radiation-absorption-by-water
#19
P Lunkenheimer, S Emmert, R Gulich, M Köhler, M Wolf, M Schwab, A Loidl
Why does a microwave oven work? How does biological tissue absorb electromagnetic radiation? Astonishingly, we do not have a definite answer to these simple questions because the microscopic processes governing the absorption of electromagnetic waves by water are largely unclarified. This absorption can be quantified by dielectric loss spectra, which reveal a huge peak at a frequency of the exciting electric field of about 20 GHz and a gradual tailing off toward higher frequencies. The microscopic interpretation of such spectra is highly controversial and various superpositions of relaxation and resonance processes ascribed to single-molecule or molecule-cluster motions have been proposed for their analysis...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347251/dynamically-crowded-solutions-of-infinitely-thin-brownian-needles
#20
Sebastian Leitmann, Felix Höfling, Thomas Franosch
We study the dynamics of solutions of infinitely thin needles up to densities deep in the semidilute regime by Brownian dynamics simulations. For high densities, these solutions become strongly entangled and the motion of a needle is essentially restricted to a one-dimensional sliding in a confining tube composed of neighboring needles. From the density-dependent behavior of the orientational and translational diffusion, we extract the long-time transport coefficients and the geometry of the confining tube...
July 2017: Physical Review. E
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