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https://www.readbyqxmd.com/read/29772473/electrophoretic-co-deposition-of-peek-hydroxyapatite-composite-coatings-for-biomedical-applications
#1
Fatih E Baştan, Muhammad Atiq Ur Rehman, Yasemin Yıldıran Avcu, Egemen Avcu, Fatih Üstel, Aldo R Boccaccini
This study focuses on the optimization of electrophoretic deposition (EPD) and suspension parameters for producing PEEK-hydroxyapatite (HA) coatings with feasible microstructure, adhesion strength, and in-vitro bioactivity. Nanostructured hydroxyapatite (HA) micro-granules were incorporated with PEEK to form PEEK-hydroxyapatite composite coatings via EPD. After EPD, a heat-treatment at 375 °C was applied for densification of the coatings and for enhancing the adhesion between the coatings and the substrates...
May 3, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29771829/repairing-a-facial-cleft-by-polyether-ether-ketone-implant-combined-with-titanium-mesh
#2
Yuan Deng, Weiwei Tang, Zhengkang Li
The Tessier Number 4 cleft is one of the rarest, most complex craniofacial anomalies that presents difficulties in surgical treatment. In this article, we report a case of simultaneous facial depression, eye displacement, and medial canthus deformity. In this case, the maxillary bony defect was reconstructed using computer-assisted design computer-assisted manufacturing (CAD-CAM) polyether-ether-ketone (PEEK) material, and the orbital floor defect was repaired with AO prefabricated titanium mesh. Additionally, the medial canthus was modified with canthopexy and a single Z-plasty flap...
May 15, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29771180/patient-adherence-to-an-exercise-program-for-chronic-low-back-pain-measured-by-patient-report-physiotherapist-perception-and-observational-data
#3
Kerry Peek, Mariko Carey, Lisa Mackenzie, Robert Sanson-Fisher
The effectiveness of exercise programs for chronic low back pain (CLBP) is dependent upon patient adherence which is problematic to measure accurately. This cross-sectional observational study aimed to compare patient-reported levels of adherence with physiotherapists' perceptions of patient adherence; and to explore the proportion of patients who could accurately recall and demonstrate the exercises contained within their prescribed exercise program for CLBP. Participating patients (n = 61) included those attending for a follow-up consultation with a physiotherapist (n = 15) at a consenting practice (n = 6) who had been prescribed an exercise program for CLBP...
May 17, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29768173/peek-peak-pique-repeating-motifs-of-subtle-variance-are-targets-for-potent-malaria-antibodies
#4
Stephen W Scally, Jean-Philippe Julien
Biomedical interventions to curb malaria-causing Plasmodium falciparum (Pf) infections are critically needed. Two studies in Nature Medicine,Kisalu et al. (2018) and Tan et al. (2018), report the isolation of potent human antibodies that target a new epitope on Pf sporozoites and mediate effective parasite inhibition in pre-clinical models.
May 15, 2018: Immunity
https://www.readbyqxmd.com/read/29765645/accelerated-degradation-of-polyetheretherketone-and-its-composites-in-the-deep-sea
#5
Hao Liu, Jianzhang Wang, Pengfei Jiang, Fengyuan Yan
The performance of polymer composites in seawater, under high hydrostatic pressure (typically few tens of MPa), for simulating exposures at great depths in seas and oceans, has been little studied. In this paper, polyetheretherketone (PEEK) and its composites reinforced by carbon fibres and glass fibres were prepared. The seawater environment with different seawater hydrostatic pressure ranging from normal pressure to 40 MPa was simulated with special equipment, in which the seawater absorption and wear behaviour of PEEK and PEEK-based composites were examined in situ ...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764301/bioinspired-biocompatible-and-peptide-decorated-silk-fibroin-coatings-for-enhanced-osteogenesis-of-bioinert-implant
#6
Chunyan Wang, Shengnan Wang, Yuanyi Yang, Zhuo Jiang, Yi Deng, Shaoli Song, Weizhong Yang, Zhi-Gang Chen
In this study, we develop an osteopromotive polyetheretherketone (PEEK) implant decorated with silk fibroin and bone forming peptide, in which the surface of bioinert PEEK implant is firstly sulfonated to form a three-dimensional, porous topography and then is functionalized with silk fibroin via spin-coating process and peptide decoration. The bio-test results show that cells on the functional bioinert implants exhibit better cell adhesion, proliferation and spreading, when compared with the uncoated ones...
May 15, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29762019/insights-into-magneto-optics-of-helical-conjugated-polymers
#7
Pan Wang, Intak Jeon, Zhou Lin, Martin D Peeks, Suchol Savagatrup, Steven E Kooi, Troy Van Voorhis, Timothy M Swager
Materials with magneto-optic (MO) properties have enabled critical fiber-optic applications and highly sensitive magnetic field sensors. While traditional MO materials are inorganic in nature, new generations of MO materials based on organic semiconducting polymers could allow increased versatility for device architectures, manufacturing options, and flexible mechanics. However, the origin of MO activity in semiconducting polymers is far from understood. In this paper, we report high MO activity observed in a chiral helical poly-3-(alkylsulfone)thiophene (P3AST), which confirms a new design for the creation of a giant Faraday effect with Verdet constants up to (7...
May 15, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29757760/cannula-tip-with-integrated-volume-sensor-for-rotary-blood-pump-control-early-stage-development
#8
Joshua Cysyk, Ray Newswanger, Eric Popjes, Walter Pae, Choon-Sik Jhun, Jenelle Izer, William Weiss, Gerson Rosenberg
The lack of direct measurement of left ventricular unloading is a significant impediment to the development of an automatic speed control system for continuous-flow left ventricular assist devices (cf-LVADs). We have developed an inlet cannula tip for cf-LVADs with integrated electrodes for volume sensing based on conductance. Four platinum-iridium ring electrodes were installed into grooves on a cannula body constructed from polyetheretherketone (PEEK). A sinusoidal current excitation waveform (250 μA pk-pk, 50 kHz) was applied across one pair of electrodes, and the conductance-dependent voltage was sensed across the second pair of electrodes...
May 10, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29744451/biofunctional-mg-coating-on-peek-for-improving-bioactivity
#9
Xiaoming Yu, Muhammad Ibrahim, Zongyuan Liu, Huazhe Yang, Lili Tan, Ke Yang
High purity Mg was successfully coated on polyetheretherketone (PEEK) by vapor deposition method in order to improve the bioactivity including antibacterial property of PEEK implant. The morphology and elemental composition of the coating were characterized by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), showing that the coating was mainly composed of Mg at deposition temperature of 175 °C, 185 °C, 200 °C and 230 °C. The higher the substrate temperature was, the larger the Mg particle size was...
June 2018: Bioactive Materials
https://www.readbyqxmd.com/read/29738859/analysis-of-a-unilateral-bridging-cage-for-lumbar-interbody-fusion-2-year-clinical-results-and-fusion-rate-with-a-focus-on-subsidence
#10
Nicolas Heinz von der Hoeh, Tomaso Villa, Fabio Galbusera Galbusera, Anna Voelker, Ulrich A Spiegl, Jan-Sven Jarvers, Christoph-Eckhard Heyde
PURPOSE: The aim of this study was to evaluate the biomechanical stability and the clinical and radiographic outcomes of patients undergoing transforaminal lumbar interbody fusion (TLIF) using an oblique bridging cage with a particular focus on subsidence. METHODS: Finite element models (FEMs) were developed to compare the biomechanics of the oblique cage with conventional PLIF and banana-shaped cages with TLIF. Additionally, a retrospective review of a prospective collected database was performed to investigate the clinical and radiological results with a focus on the subsidence rate using an oblique polyetheretherketone (PEEK) cage with a bicortical load-bearing design...
May 5, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29733080/erratum-to-composite-peek-carbon-fiber-implants-can-increase-the-effectiveness-of-radiotherapy-in-the-management-of-spine-tumors
#11
(no author information available yet)
[This corrects the article DOI: 10.21037/jss.2017.06.20.].
March 2018: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/29732661/wear-properties-of-poly-ether-ether-ketone-bearing-combinations-under-zero-and-cross-shear-kinematics-in-total-knee-arthroplasty
#12
Kathryn A Chamberlain, Kenneth S Rankin, Adam Briscoe, David Deehan, Philip J Hyde
Poly-ether-ether-ketone (PEEK), having shown favorable biocompatibility in spinal applications is being considered as an alternative biomaterial in orthopaedics, either as part of an all-polymer bearing couple, or a replacement for the metallic component in hard-on-soft bearings. Throughout the literature ultra-high molecular weight polyethylene exhibits a range of wear behavior dependent upon the amount of cross shear (CS) present in the bearing motion; in comparison, the behavior of PEEK bearing combinations subject to cross shear conditions is less understood...
May 7, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29731599/alcohol-related-injuries-among-eastern-croatian-university-students
#13
Ivan Miskulin, Corinne Peek-Asa, Maja Miskulin
The aim of this study was to describe the alcohol consumption patterns and to identify the association of injury with excess drinking among Croatian students. This cross-sectional study was conducted among 845 university students by the use of the WHO AUDIT questionnaire. A total of 39.9% of the university students reported some level of excess drinking and 21.3% reported that injury to themselves or others occurred as a result of their alcohol use. Conclusively, these results demonstrate a significant need for comprehensive programs to reduce alcohol intake and associated alcohol problems, as well as programs to reduce injuries among Croatian university students...
2018: Journal of Child & Adolescent Substance Abuse
https://www.readbyqxmd.com/read/29730771/custom-design-and-biomechanical-analysis-of-3d-printed-peek-rib-prostheses
#14
Jianfeng Kang, Ling Wang, Chuncheng Yang, Lei Wang, Cao Yi, Jiankang He, Dichen Li
A tumour resection normally involves a large tissue resection and bone replacement. Polyether ether ketone (PEEK) has become a suitable candidate for use in various prostheses owing to its lightness in weight, modulus close to that of natural bone, and good biocompatibility, among other factors. This study proposes a new design method for a rib prosthesis using the centroid trajectory of the natural replaced rib, where the strength can be adjusted by monitoring the cross-sectional area, shape, and properties...
May 5, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29727021/biomechanics-of-two-external-fixator-devices-used-in-rat-femoral-fractures
#15
Liza Osagie-Clouard, Joshua Kaufmann, Gordon Blunn, Melanie Coathup, Catherine Pendegrass, Richard Meeson, Timothy Briggs, Mehran Moazen
The use of external fixators allows for the direct investigation of newly formed interfragmentary bone, and the radiographic evaluation of the fracture. We validated the results of a finite element model with the in vitro stiffness' of two widely used external fixator devices used for in vivo analysis of fracture healing in rat femoral fractures with differing construction (Ti alloy ExFix1 and PEEK ExFix2). Rat femoral fracture fixation was modelled using two external fixators. For both constructs an osteotomy of 2...
May 4, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29719124/graphene-oxide-decorated-microporous-polyetheretherketone-with-superior-antibacterial-capability-and-in-vitro-osteogenesis-for-orthopedic-implant
#16
Ling Ouyang, Yi Deng, Lei Yang, Xiuyuan Shi, Taosheng Dong, Youyi Tai, Weizhong Yang, Zhi-Gang Chen
Due to its similar elastic modulus of human bones, polyetheretherketone (PEEK) has been considered as an excellent cytocompatible material. However, the bioinertness, poor osteoconduction, and weak antibacterial activity of PEEK limit its wide applications in clinics. In this study, a facile strategy is developed to prepare graphene oxide (GO) modified sulfonated polyetheretherketone (SPEEK) (GO-SPEEK) through a simple dip-coating method. After detailed characterization, it is found that the GO closely deposits on the surface of PEEK, which is attributed to the π-π stacking interaction between PEEK and GO...
May 2, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29718540/obesity-gestational-diabetes-and-macrosomia-are-associated-with-increasing-rates-of-early-term-induction-of-labour-at-the-canberra-hospital
#17
Jonathan T McGuane, Lori Grlj, Michael J Peek
BACKGROUND: Early-term delivery is an important cause of short-term neonatal morbidity and associated high healthcare costs, with possible additional long-term developmental ramifications. As a form of 'iatrogenic' delivery, induction of labour (IOL) is a potentially modifiable contributor to this burden. AIMS: To determine patterns of, and primary indication for, early-term IOL, as well as temporal trends in this primary indication and differences from other modes of delivery with respect to maternal factors and maternal/neonatal outcomes...
May 2, 2018: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29717227/children-passively-allow-other-s-rule-violations-in-cooperative-situations
#18
Ayaka Ikeda, Yuko Okumura, Tessei Kobayashi, Shoji Itakura
Recent studies in developmental psychology have revealed the developmental origins of cooperation. Although such studies regard cooperation as a pro-social behavior, studies on adults have found a negative aspect: cooperation sometimes promotes unethical behavior. Adults also exhibit altruistic cheating, even though their cheating might not actually benefit them. However, the development of negative aspects of cooperation remains unclear. Our study examined whether 7-year-old children engage in negative aspects of cooperation from two aspects using a peeking paradigm...
May 1, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29716412/trends-in-asthma-self-management-skills-and-inhaled-corticosteroid-use-during-pregnancy-and-postpartum-from-2004-to-2017
#19
Annelies L Robijn, Megan E Jensen, Peter G Gibson, Heather Powell, Warwick B Giles, Vicki L Clifton, Joerg Mattes, Michael J Peek, Helen L Barrett, Sean K Seeho, Leonie K Callaway, Alistair Abbott, John Attia, Peter A Wark, Vanessa E Murphy
OBJECTIVE: Asthma exacerbations and medication non-adherence are significant clinical problems during pregnancy. While asthma self-management education is effective, the number of education sessions required to maximise asthma management knowledge and inhaler technique and whether improvements persist postpartum, is unknown. This paper describes how asthma knowledge, skills, and inhaled corticosteroid (ICS) use have changed over time. METHODS: Data were obtained from three cohorts of pregnant women with asthma recruited in Newcastle, Australia between 2004-2017 (N = 895)...
May 2, 2018: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29716125/iterative-matrix-algorithm-for-high-precision-temperature-and-force-decoupling-in-multi-parameter-fbg-sensing
#20
Barbara Hopf, Franz J Dutz, Thomas Bosselmann, Michael Willsch, Alexander W Koch, Johannes Roths
A new iterative matrix algorithm has been applied to improve the precision of temperature and force decoupling in multi-parameter FBG sensing. For the first time, this evaluation technique allows the integration of nonlinearities in the sensor's temperature characteristic and the temperature dependence of the sensor's force sensitivity. Applied to a sensor cable consisting of two FBGs in fibers with 80 µm and 125 µm cladding diameter installed in a 7 m-long coiled PEEK capillary, this technique significantly reduced the uncertainties in friction-compensated temperature measurements...
April 30, 2018: Optics Express
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