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https://www.readbyqxmd.com/read/29353150/biodegradable-spacer-reduces-the-subacromial-pressure-a-biomechanical-cadaver-study
#1
Yan Chevalier, Matthias F Pietschmann, Christoph Thorwächter, Ofir Chechik, Eliyahu Adar, Assaf Dekel, Peter E Müller
BACKGROUND: Failure after rotator cuff repair remains a major clinical problem and could be related to excessive pressures from the acromion. Previous studies with irreparable tears showed good clinical results of tendon healing with arthroscopic insertion of a protective biodegradable spacer balloon between the repaired tendon and the acromion. One hypothesis is that compression pressures on the repaired tendon will be reduced by the spacer. This cadaver study aimed to investigate the effects of this subacromial spacer on compression pressures over a repaired supraspinatus tendon in passive motion...
December 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29352792/relationship-between-global-and-segmental-dynamics-of-poly-butylene-oxide-studied-by-broadband-dielectric-spectroscopy
#2
Osamu Urakawa, Minoru Yamane, Shota Tomie, Tadashi Inoue, Toshiyuki Shikata, Keiichiro Adachi
Relationship between segmental relaxation and normal-mode relaxation has been studied for molten poly(butylene oxide)s having various molecular weights by broadband dielectric spectroscopy over a wide temperature (T) range. We found that T dependence of the segmental relaxation time, τs, was weaker than the normal mode time, τn, at high T(>250 K ∼ Tg + 50 K), and the τn/τs ratio systematically decreased with increasing temperature. This high temperature complexity, whose mechanism has not been discussed in detail so far, was quantitatively explained by assuming the two step processes: local conformation change of polymers (elementary process) occurs first, and then the motion of a segment unit (second process) occurs...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352779/hydrodynamically-coupled-brownian-dynamics-a-coarse-grain-particle-based-brownian-dynamics-technique-with-hydrodynamic-interactions-for-modeling-self-developing-flow-of-polymer-solutions
#3
V R Ahuja, J van der Gucht, W J Briels
We present a novel coarse-grain particle-based simulation technique for modeling self-developing flow of dilute and semi-dilute polymer solutions. The central idea in this paper is the two-way coupling between a mesoscopic polymer model and a phenomenological fluid model. As our polymer model, we choose Responsive Particle Dynamics (RaPiD), a Brownian dynamics method, which formulates the so-called "conservative" and "transient" pair-potentials through which the polymers interact besides experiencing random forces in accordance with the fluctuation dissipation theorem...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352685/factors-associated-with-posterior-cruciate-ligament-tightness-during-cruciate-retaining-total-knee-arthroplasty
#4
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
#5
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/29351875/trunk-and-pelvic-dynamics-during-transient-turns-among-individuals-with-unilateral-traumatic-lower-limb-amputation
#6
Pawel R Golyski, Brad D Hendershot
Prior work has identified alterations in trunk-pelvic dynamics with lower limb amputation (LLA) during in-line walking; however, evaluations of other ambulatory tasks are limited. Turns are ubiquitous in daily life but can be challenging for individuals with LLA, prompting additional or unique proximal compensations when changing direction, which over time may lead to development of low back pain. We hypothesized such proximal kinematic differences between persons with and without LLA would exist in the sagittal and frontal planes...
January 16, 2018: Human Movement Science
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
#7
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/29351268/use-of-different-methods-of-intramedullary-nailing-for-fixation-of-distal-radius-fractures-a-retrospective-analysis-of-clinical-and-radiological-outcomes
#8
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/29351158/physical-performance-measures-of-flexibility-hip-strength-lower-limb-power-and-trunk-endurance-in-healthy-navy-cadets-normative-data-and-differences-between-sex-and-limb-dominance
#9
Thiago Jambo Alves Lopes, Milena Simic, Daniel de Souza Alves, Priscila Dos Santos Bunn, Allan Inoue Rodrigues, Bruno de Souza Terra, Maicom da Silva Lima, Fabrício Miranda Ribeiro, Patrick Vilão, Evangelos Pappas
The objectives were to provide normative data on commonly used physical performance tests that may be associated with musculoskeletal injuries in Navy cadets, and assess for sex and limb dominance differences. A large cohort of Navy cadets were assessed for physical performance tests of flexibility (ankle dorsiflexion range of motion and sit and reach), isometric hip strength, lower limb power (single leg hop), and trunk endurance (plank and side plank tests). Besides providing normative data tables, sex and limb dominance differences were assessed by a two-way mixed ANOVA...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29350955/rate-dependence-of-elementary-rearrangements-and-spatiotemporal-correlations-in-the-3d-flow-of-soft-solids
#10
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/29350922/computing-curvature-sensitivity-of-biomolecules-in-membranes-by-simulated-buckling
#11
Federico Elias-Wolff, Martin Lindén, Alexander P Lyubartsev, Erik G Brandt
Membrane curvature sensing, where the binding free energies of membrane-associated molecules depend on the local membrane curvature, is a key factor to modulate and maintain the shape and organization of cell membranes. However, the microscopic mechanisms are not well understood, partly due to absence of efficient simulation methods. Here, we describe a method to compute the curvature dependence of the binding free energy of a membrane-associated probe molecule that interacts with a buckled membrane, which has been created by lateral compression of a flat bilayer patch...
January 19, 2018: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29350555/outcomes-of-latarjet-procedure-compared-with-bankart-repair-for-recurrent-traumatic-anterior-shoulder-instability
#12
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/29350528/proton-and-carbon-13-dynamic-nuclear-polarization-of-methylated-%C3%AE-cyclodextrins
#13
Filippo Caracciolo, Alessandra Lucini Paioni, Lucio Melone, Marta Filibian, Pietro Carretta
1 H and 13 C dynamic nuclear polarization has been studied in 13 C-enriched β - cyclodextrins doped with TEMPO free radical. 1 H and 13 C polarizations raised above 7.5 % and 7 % , respectively, and for both nuclear species the transfer of polarization from the electron spins appears to be consistent with a thermal mixing scenario for a concentration of 9 13 C nuclei per molecule. When the concentration is increased to 21 13 C nuclei per molecule a decrease in the spin-lattice relaxation and polarization build up rates is observed...
January 19, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29350367/posterior-interosseous-flap-versus-reverse-adipofascial-radial-forearm-flap-for-soft-tissue-reconstruction-of-dorsal-hand-defects
#14
Osman Akdağ, Gökçe Yıldıran, Mustafa Sütçü, Mehtap Karameşe
BACKGROUND: Our objective was to compare the outcomes of dorsal hand defect reconstruction using a posterior interosseous artery flap (PIAF) and a reverse adipofascial radial forearm flap (RARFF). METHODS: From 2008 to 2013, 23 patients who underwent hand soft tissue defect reconstruction with PIAF (11 patients) and RARFF (12 patients) were included in this retrospective study. Reconstruction methods were compared in terms of functionality with disability of the arm, shoulder, and hand (DASH) score and range of motion (ROM) and aesthetically with scar assessment...
January 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29350331/motion-deficit-in-nodal-interphalangeal-joint-osteoarthritis-by-digital-goniometer-in-housewives
#15
L Ventura-Ríos, M Hayes-Salinas, D Ferrusquia-Toriz, R I Cariño-Escobar, E Cruz-Arenas, J Gutiérrez-Martínez, L González-Ramírez, C Hernández-Díaz
Range of motion (ROM) measured objectively in nodal hand osteoarthritis (NHOA) is missing. Evaluation of collateral ligaments by ultrasound (US) is unknown in NHOA also. To compare ROM in interphalangeal joints in housewives with nodal OA, with a control group by a digital system using angle to voltage (Multielgon). The second objective was to assess correlation between collateral radial and ulnar ligaments thickness and ROM. For this cross-sectional observational study, we assessed 60 hands with symptomatic NHOA and 30 hands of healthy housewives matched for age...
January 19, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29350321/sliding-to-predict-vision-based-beating-heart-motion-estimation-by-modeling-temporal-interactions
#16
Angelica I Aviles-Rivero, Samar M Alsaleh, Alicia Casals
PURPOSE: Technical advancements have been part of modern medical solutions as they promote better surgical alternatives that serve to the benefit of patients. Particularly with cardiovascular surgeries, robotic surgical systems enable surgeons to perform delicate procedures on a beating heart, avoiding the complications of cardiac arrest. This advantage comes with the price of having to deal with a dynamic target which presents technical challenges for the surgical system. In this work, we propose a solution for cardiac motion estimation...
January 19, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29350088/the-use-of-synthetic-ligaments-in-the-design-of-an-enhanced-stability-total-knee-joint-replacement
#17
Michael D Stokes, Brendan C Greene, Luke W Pietrykowski, Taylor M Gambon, Caroline E Bales, John D DesJardins
Current total knee replacement designs work to address clinically desired knee stability and range of motion through a balance of retained anatomy and added implant geometry. However, simplified implant geometries such as bearing surfaces, posts, and cams are often used to replace complex ligamentous constraints that are sacrificed during most total knee replacement procedures. This article evaluates a novel total knee replacement design that incorporates synthetic ligaments to enhance the stability of the total knee replacement system...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
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
#18
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/29349975/-clinical-research-on-the-arthroscopic-treatment-for-recurrent-patellar-dislocation-by-anatomical-reconstruction-of-medial-patellarfemoral-ligament
#19
Zhen-Yang Yu, Xu Cai, Wang Gu
OBJECTIVE: To observe the therapeutic effects of arthroscopic treatment for recurrent patellar dislocation by anatomical reconstruction of medial patellarfemoral ligament. METHODS: From June 2009 to December 2014, 25 patients with recurrent patellar dislocation were treated with anatomical reconstruction of medial patellarfemoral ligament surgery under arthroscopy. There were 10 males and 15 females, with an average age of 18.4 years old (ranged, 15 to 25 years old )...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349962/-midterm-clinical-outcome-for-ankylosing-spondylitis-patients-with-early-hip-involved-diseases-treated-with-arthroscopic-technique
#20
Chun-Bao Li, Wei Qi, Zhi-Gang Wang, Zhong-Li Li, Min Wei, Xu Cai, Qiang Zhang, Juan-Li Zhu, Yang Liu, Yu-Jie Liu
OBJECTIVE: To study the clinical outcome of manipulation release combined with arthroscopic debridement and synovia resection under general anesthesia for early hip involvment in patients with ankylosing spondylitis. METHODS: Manipulation release combined with arthroscpic debridement and synovium resection were performed for hip lesion in 22 patients with ankylosing spondylitis from June 2011 to June 2013, incuding 6 males and 16 females with anverage age of 24...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
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