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https://www.readbyqxmd.com/read/28642192/applications-of-3d-orbital-computer-assisted-surgery-cas
#1
Paolo Scolozzi
INTRODUCTION: The purpose of the present report is to describe the indications for use of 3D orbital computer-assisted surgery (CAS). PATIENTS AND METHODS: We analyzed the clinical and radiological data of all patients with orbital deformities treated using intra-operative navigation and CAD/CAM techniques at the Hôpitaux Universitaires de Genève, Switzerland, between 2009 and 2016. We recorded age and gender, orbital deformity, technical and surgical procedure and postoperative complications...
June 19, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28641822/interim-rehabilitation-of-occlusal-vertical-dimension-using-a-double-crown-retained-removable-dental-prosthesis-with-polyetheretherketone-framework
#2
Sebastian Hahnel, Christian Scherl, Martin Rosentritt
Polyetheretherketone (PEEK) is a polymeric material that has recently been introduced in dentistry and can be used as framework material for fixed and removable dental prostheses. This clinical report describes the fabrication of a double-crown-retained prosthesis with a PEEK framework in a patient with a substantially diminished occlusal vertical dimension. The insertion of the removable dental prosthesis with a PEEK framework resulted in the functional and esthetic rehabilitation of the patient; however, removable dental prostheses fabricated from PEEK should currently be regarded as interim restorations because of the limited available scientific evidence...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28637351/tuning-surface-chemistry-of-polyetheretherketone-by-gold-coating-and-plasma-treatment
#3
Zdeňka Novotná, Silvie Rimpelová, Petr Juřík, Martin Veselý, Zdeňka Kolská, Tomáš Hubáček, Jakub Borovec, Václav Švorčík
Polyetheretherketone (PEEK) has good chemical and biomechanical properties that are excellent for biomedical applications. However, PEEK exhibits hydrophobic and other surface characteristics which cause limited cell adhesion. We have investigated the potential of Ar plasma treatment for the formation of a nanostructured PEEK surface in order to enhance cell adhesion. The specific aim of this study was to reveal the effect of the interface of plasma-treated and gold-coated PEEK matrices on adhesion and spreading of mouse embryonic fibroblasts...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28631008/regulation-of-neural-circuit-formation-by-protocadherins
#4
REVIEW
Stacey L Peek, Kar Men Mah, Joshua A Weiner
The protocadherins (Pcdhs), which make up the most diverse group within the cadherin superfamily, were first discovered in the early 1990s. Data implicating the Pcdhs, including ~60 proteins encoded by the tandem Pcdha, Pcdhb, and Pcdhg gene clusters and another ~10 non-clustered Pcdhs, in the regulation of neural development have continually accumulated, with a significant expansion of the field over the past decade. Here, we review the many roles played by clustered and non-clustered Pcdhs in multiple steps important for the formation and function of neural circuits, including dendrite arborization, axon outgrowth and targeting, synaptogenesis, and synapse elimination...
June 19, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28629090/low-temperature-direct-heterogeneous-bonding-of-polyether-ether-ketone-and-platinum
#5
Weixin Fu, Akitsu Shigetou, Shuichi Shoji, Jun Mizuno
Direct heterogeneous bonding between polyether ether ketone (PEEK) and Pt was realized at the temperatures lower than 150°C. In order to create sufficient bondability to diverse materials, the surface was modified by vacuum ultraviolet (VUV) irradiation, which formed hydrate bridges. For comparison, direct bonding between surfaces atomically cleaned via Ar fast atom bombardment (FAB) was conducted in a vacuum. The VUV irradiation was found to be effective for creating an ultrathin hydrate bridge layer from the residual water molecules in the chamber...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629028/physicochemical-and-biological-assessment-of-peek-composites-embedding-natural-amorphous-silica-fibers-for-biomedical-applications
#6
Patrícia R Monich, Fernanda V Berti, Luismar M Porto, Bruno Henriques, Antonio P Novaes de Oliveira, Márcio C Fredel, Júlio C M Souza
The main aim of this study was to assess the physicochemical and biological properties of a novel poly(ether ether ketone) (PEEK) composite containing 30%wt natural amorphous silica fibers (NASF). PEEK and NASF powders were previously functionalized by atomization and citric acid in order to enhance adhesion between polymeric matrix and fillers. Then, composites were produced by cold compression molding technique at 350°C for 3h. Materials were characterized by chemical, microstructural, thermophysical, mechanical and cytotoxic analysis...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629005/laser-surface-structuring-of-ti6al4v-substrates-for-adhesion-enhancement-in-ti6al4v-peek-joints
#7
Bruno Henriques, Miguel Sampaio, Mihaela Buciumeanu, Júlio C M Souza, José R Gomes, Filipe Silva, Oscar Carvalho
PEEK is a promising polymer possessing high mechanical strength and biocompatibility and therefore it can be associated to titanium for biomedical applications. This study aimed at producing Ti6Al4V-PEEK joints with enhanced adhesion through laser-structuring Ti6Al4V treatments. Ti6Al4V cylindrical substrates were prepared by two types of surface treatments: alumina blasting and laser structuring. The holes number and size in laser-structured surfaces was varied. PEEK was then hot pressed against the metallic substrate to completely filling the surface cavities...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28622909/biomechanical-evaluation-of-a-novel-pedicle-screw-based-interspinous-spacer-a-finite-element-analysis
#8
Hsin-Chang Chen, Jia-Lin Wu, Shou-Chieh Huang, Zheng-Cheng Zhong, Shiu-Ling Chiu, Yu-Shu Lai, Cheng-Kung Cheng
Interspinous spacers have been designed to provide a minimally invasive surgical technique for patients with lumbar spinal stenosis or foraminal stenosis. A novel pedicle screw-based interspinous spacer has been developed in this study, and the aim of this finite element experiment was to investigate the biomechanical differences between the pedicle screw-based interspinous spacer (M-rod system) and the typical interspinous spacer (Coflex-F™). A validated finite element model of an intact lumbar spine was used to analyze the insertions of the Coflex-F™, titanium alloy M-rod (M-Ti), and polyetheretherketone M-rod (M-PEEK), independently...
June 13, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28621632/how-can-nanoparticles-be-used-in-sentinel-node-detection
#9
Muneer Ahmed, Mirjam Cl Peek, Michael Douek
No abstract text is available yet for this article.
June 16, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28598951/the-impact-of-legislation-on-gas-can-and-mattress-related-burn-injuries
#10
Kellogg Levi, Butcher Brandon, Peek-Asa Corinne, Wibbenmeyer Lucy
Burn prevention program success requires thorough evaluation of intervention outcomes. The impact of 2 engineering-specific burn prevention regulations, the Children's Gasoline Burn Prevention Act, and the Standard for the Flammability of Mattress Sets will be assessed. Records from 1997 to 2015 within the Consumer Product Safety Commission's (CPSC) National Electronic Injury Surveillance System (NEISS) were reviewed. After identifying gas can- and mattress-involved burn injuries, injury incidence was estimated by utilizing survey sampling weights associated with each record...
June 6, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28597882/quantifying-the-exchange-coupling-in-linear-copper-porphyrin-oligomers
#11
Sabine Richert, Ilya Kuprov, Martin D Peeks, Elizaveta A Suturina, Jonathan Cremers, Harry L Anderson, Christiane R Timmel
Linear π-conjugated porphyrin oligomers are of significant current interest due to their potential applications as molecular wires. In this study we investigate electronic communication in linear butadiyne-linked copper porphyrin oligomers by electron paramagnetic resonance (EPR) spectroscopy via measurement of the exchange interaction, J, between the copper(ii) centers. The contributions of dipolar and exchange interactions to the frozen solution continuous wave (cw) EPR spectra of the compounds with two or more copper porphyrin units were explicitly accounted for in numerical simulations using a spin Hamiltonian approach...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28584418/comparison-of-osteogenic-potential-of-poly-ether-ether-ketone-with-titanium-coated-poly-ether-ether-ketone-and-titanium-blended-poly-ether-ether-ketone-an-in-vitro-study
#12
T Anjan Kumar, J Brintha Jei, B Muthukumar
STATEMENT OF PROBLEM: Poly-ether-ether-ketone (PEEK), a high-performance semi-crystalline thermoplastic polymer, has been employed to replace the metallic implant components in orthopedics. There were various studies performed in accordance to medical grade PEEK, but the relationship between titanium dioxide (TiO2)-coated PEEK, TiO2-blended PEEK, and untreated PEEK still remains complicated, even undefined. PURPOSE: The purpose of this study was to compare and quantify the osteogenic potential of untreated PEEK, TiO2-coated PEEK and TiO2-blended PEEK...
April 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28583825/a-summary-of-the-2016-james-w-freston-conference-of-the-american-gastroenterological-association-intestinal-metaplasia-in-the-esophagus-and-stomach-origins-differences-similarities-and-significance
#13
Stuart J Spechler, Juanita L Merchant, Timothy C Wang, Parakrama Chandrasoma, James G Fox, Robert M Genta, James R Goldenring, Yoku Hayakawa, Ernst J Kuipers, Pauline K Lund, Frank McKeon, Jason Mills, Robert D Odze, Richard M Peek, Thai Pham, Jianwen Que, Anil K Rustgi, Nicholas J Shaheen, Ramesh A Shivdasani, Rhonda Souza, Peter Storz, Andrea Todisco, David H Wang, Nicholas A Wright
No abstract text is available yet for this article.
June 2, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28582300/analyzing-the-cost-of-autogenous-cranioplasty-versus-custom-made-patient-specific-alloplastic-cranioplasty
#14
Mohamed Amir Mrad, Khalid Murrad, Oleh Antonyshyn
PURPOSE: Comparing expenses related to autogenous cranial vault reconstruction versus custom-made patient-specific alloplastic cranioplasty. METHODS: The authors retrospectively reviewed charts of a group of patients who underwent autogenous cranioplasty and poly-ether-ether ketone (PEEK) cranioplasty. The data collected from the patient files included demographic information, details of the surgery, postoperative recovery data, and also duration of surgery. The authors also added costs related to the length of surgery, utilization of intensive care unit, length of hospital stay, amount and seriousness of complications, and hardware cost...
June 2, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28580863/validation-of-a-quantitative-eimeria-spp-pcr-for-fresh-droppings-of-broiler-chickens
#15
H W Peek, C Ter Veen, R Dijkman, W J M Landman
A quantitative Polymerase Chain Reaction (qPCR) for the seven chicken Eimeria spp. was modified and validated for direct use on fresh droppings. The analytical specificity of the qPCR on droppings was 100%. Its analytical sensitivity (non-sporulated oocysts/g droppings) was 41 for E. acervulina, ≤2,900 for E. brunetti, 710 for E. praecox, 1,500 for E. necatrix, 190 for E. tenella, 640 for E. maxima and 1,100 for E. mitis. Field validation of the qPCR was done using droppings with non-sporulated oocysts from 19 broilers flocks...
June 5, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28580514/complete-protection-against-cryodamage-of-cryopreserved-whole-bovine-and-human-ovaries-using-dmso-as-a-cryoprotectant
#16
Johan R Westphal, Renne Gerritse, Didi D M Braat, Catharina C M Beerendonk, Ronald Peek
PURPOSE: This study aims to determine the optimal cryopreservation protocol for whole ovaries intended for preservation of fertility in women. METHODS: We investigated the optimal cryopreservation procedure for whole ovaries in a bovine model. The following parameters were investigated to determine their effect on ovarian tissue viability: type of cryoprotectant, administration route of the cryoprotectant (perfusion and/or submersion), and the maximum tolerable interval between death of the animal and start of the cryopreservation process...
June 3, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28560769/patient-experience-of-chronic-illness-care-and-medical-home-transformation-in-safety-net-clinics
#17
Elizabeth L Tung, Yue Gao, Monica E Peek, Robert S Nocon, Kathryn E Gunter, Sang Mee Lee, Marshall H Chin
OBJECTIVE: To examine the relationship between medical home transformation and patient experience of chronic illness care. STUDY SETTING: Thirteen safety net clinics located in five states enrolled in the Safety Net Medical Home Initiative. STUDY DESIGN: Repeated cross-sectional surveys of randomly selected adult patients were completed at baseline (n = 303) and postintervention (n = 271). DATA COLLECTION METHODS: Questions from the Patient Assessment of Chronic Illness Care (PACIC) (100-point scale) were used to capture patient experience of chronic illness care...
May 30, 2017: Health Services Research
https://www.readbyqxmd.com/read/28556590/biocompatibility-of-four-common-orthopedic-biomaterials-following-neuroelectromyostimulation-an-in-vivo-study
#18
Lecocq Mathieu, Felix Marie-Solenne, Bernard Cécile, Linares Jean-Marc, Chaves-Jacob Julien, Decherchi Patrick, Dousset Erick
Despite the worldwide high prevalence of total joint arthroplasty (TJA), life expectancy of prosthesis remains limited by mechanical and chemical constraint which promote wear debris production, surrounding tissues damage and finally prosthesis loosening. Such results could be amplified by neuro-myoelectrostimulation (NMES; widely used to reduce neuromuscular deficits observed following TJA surgery). It was previously described in an in vivo experiment that interactions between NMES and Ti6Al4V implant are deleterious for both implant and surrounding muscles...
May 29, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28552926/modelling-and-structural-analysis-of-skull-cranial-implant-beyond-mid-line-deformities
#19
V Phanindra Bogu, Y Ravi Kumar, Asit Kumar Khanara
PURPOSE: This computational study explores modelling and finite element study of the implant under Intracranial pressure (ICP) conditions with normal ICP range (7 mm Hg to 15 mm Hg) or increased ICP (>I5 mm Hg). The implant fixation points allow implant behaviour with respect to intracranial pressure conditions. However, increased fixation points lead to variation in deformation and equivalent stress. Finite element analysis is providing a valuable insight to know the deformation and equivalent stress...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28545535/electronic-audit-and-feedback-intervention-with-action-implementation-toolbox-to-improve-pain-management-in-intensive-care-protocol-for-a-laboratory-experiment-and-cluster-randomised-trial
#20
Wouter T Gude, Marie-José Roos-Blom, Sabine N van der Veer, Evert de Jonge, Niels Peek, Dave A Dongelmans, Nicolette F de Keizer
BACKGROUND: Audit and feedback is often used as a strategy to improve quality of care, however, its effects are variable and often marginal. In order to learn how to design and deliver effective feedback, we need to understand their mechanisms of action. This theory-informed study will investigate how electronic audit and feedback affects improvement intentions (i.e. information-intention gap), and whether an action implementation toolbox with suggested actions and materials helps translating those intentions into action (i...
May 25, 2017: Implementation Science: IS
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