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retention, support, stability

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https://www.readbyqxmd.com/read/27843652/implant-retained-obturator-for-an-edentulous-patient-with-a-hemimaxillectomy-defect-complicated-with-microstomia
#1
Pravinkumar G Patil, Smita Nimbalkar-Patil
Patient. A 68-year-old man was operated on for squamous cell carcinoma (T3N3M0) of the maxilla creating the hemimaxillary surgical defect on right side. The remaining arch was completely edentulous. There was remarkable limitation in the oral opening with reduced perimeter of the oral cavity due to radiation and surgical scar contracture. This article describes prosthetic rehabilitation by modifying the design of the obturator and achieving the retention with dental implant. Discussion. Severe limitation in the oral opening may occur in clinical situations following the postsurgical management of oral and maxillofacial defects...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27836275/phosphate-removal-by-lead-exhausted-bioadsorbents-simultaneously-achieving-lead-stabilization
#2
Shunli Wan, Jiayu Wu, Feng He, Shanshan Zhou, Rui Wang, Bin Gao, Jianmeng Chen
Low-cost adsorbents have been continuously developed for heavy metal removal, but little information is available concerning the follow-up treatment of the toxic metal-laden adsorbents. In this study, an optional strategy was provided for the further treatment of heavy metal-impregnated low-cost adsorbents through employing them for phosphate retention. The enhancement of phosphate adsorption by the sorbed lead was first validated using several types of raw or modified waste biomass. Tea waste-supported hydrated manganese dioxide (HMO-TW) with the highest Pb sorption capability was then chosen to systematically evaluate phosphate retention...
November 8, 2016: Chemosphere
https://www.readbyqxmd.com/read/27826392/prosthetic-reconstruction-with-an-obturator-using-swing-lock-attachment-for-a-patient-underwent-maxillectomy-a-clinical-report
#3
Dong-Jae Seong, Seoung-Jin Hong, Seung-Ryong Ha, Young-Gi Hong, Hyo-Won Kim
Patients who underwent resection of maxilla due to benign or malignant tumor, or accident will have defect in palatal area. They get retention, support and stability from remaining tissues which are hardly optimal. The advantage of swing-lock attachment design is having multiple contacts on labial and lingual side of the abutment teeth by retentive strut and palatal bracing component. Because the force is distributed equally to abutment teeth, abutment teeth of poor prognosis can be benefited from it. It is also more advantageous to cover soft tissue defects which are hard to reach with conventional prosthesis...
October 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/27825959/transcription-and-dna-damage-holding-hands-or-crossing-swords
#4
REVIEW
Giuseppina D'Alessandro, Fabrizio d'Adda di Fagagna
Transcription has classically been considered a potential threat to genome integrity. Collision between transcription and DNA replication machinery, and retention of DNA:RNA hybrids, may result in genome instability. On the other hand, it has been proposed that active genes repair faster and preferentially via homologous recombination. Moreover, while canonical transcription is inhibited in the proximity of DNA double-strand breaks, a growing body of evidence supports active non-canonical transcription at DNA damage sites...
November 5, 2016: Journal of Molecular Biology
https://www.readbyqxmd.com/read/27808493/carbon-coated-silicon-nanowires-on-carbon-fabric-as-self-supported-electrodes-for-flexible-lithium-ion-batteries
#5
Xiaolei Wang, Ge Li, Min Ho Seo, Gregory Lui, Fathy M Hassan, Kun Feng, Xingcheng Xiao, Zhongwei W Chen
A novel self-supported electrode with long cycling life and high mass loading is developed based on carbon-coated Si nanowires in situ grown on highly conductive and flexible carbon fabric substrates through a nickel catalyzed one-pot atmospheric pressure chemical vapor deposition. The high-quality carbon coated Si nanowires result in high reversible specific capacity (~3500 mA h g(-1) at 100 mA g(-1)), while 3D electrode's unique architecture leads to a significantly improved robustness and a high degree of electrode stability...
November 3, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27792312/impact-of-selected-lipf6-hydrolysis-products-on-the-high-voltage-stability-of-lithium-ion-battery-cells
#6
Ralf Wagner, Martin Korth, Benjamin Streipert, Johannes Kasnatscheew, Dennis Roman Gallus, Sebastian Brox, Marius Amereller, Isidora Cekic-Laskovic, Martin Winter
Diverse LiPF6 hydrolysis products evolve during lithium-ion battery cell operation at high operation voltages and high operation temperatures. However, their influence on the electrode/electrolyte interfaces is not yet investigated and understood. In this work, literature-known hydrolysis products of LiPF6 dimethyl fluorophosphate (DMFP) and diethyl fluorophosphate (DEFP) were synthesized and investigated as electrolyte additives. The addition of only 1 wt.% DMFP or DEFP to 1 M LiPF6 in EC:EMC (1:1, by wt.) electrolyte results in improved capacity retention, increased Coulombic efficiencies (CEs) and reduced self-discharge of LiNi1/3Mn1/3Co1/3O2 (NMC111)/Li half cells charged to the elevated upper cut-off potential of 4...
October 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27759845/post-operative-hemimaxillectomy-rehabilitation-using-prostheses-supported-by-zygoma-implants-and-remaining-natural-teeth
#7
Xing Zhou Qu, Ming Yi Wang, Hui Shan Ong, Chen Ping Zhang
OBJECTIVES: This study aimed to evaluate the stability of prostheses supported by zygoma implants and remaining teeth for subjects who had undergone hemi-maxillectomy. METHODS: Ten patients were included in the study. Oral rehabilitation was performed using a temporary prosthesis that was supported by remaining teeth for the first three months. Then, a zygoma implant was placed to provide support for a final prosthesis in addition to the remaining teeth. Each prosthesis was tailor-made according to biomechanical three-dimensional finite element analysis results...
October 1, 2016: Clinics
https://www.readbyqxmd.com/read/27717931/problems-and-challenges-in-the-early-period-of-rehabilitating-patients-with-severe-hypothermia-treated-using-ecmo-support
#8
Dominika Batycka-Stachnik, Agnieszka Piwoda, Tomasz Darocha, Malgorzata Spiewak, Sylweriusz Kosinski, Anna Jarosz, Hubert Hymczak, Tomasz Sanak, Robert Galazkowski, Jacek Piatek, Janusz Konstanty-Kalandyk, Rafal Drwila
: The objectives: To show and discuss the most frequent functional problems encountered in patients who underwent extracorporeal membrane oxygenation (ECMO) treatment after severe hypothermia and point out appropriate physiotherapy procedures used in order to diminish the effects of hypothermia on the human organism. It is necessary to look for effective physiotherapeutic solutions, especially that the number of scientific publications on the subject is very limited. DESIGN: Retrospective analysis Setting: Severe Accidental Hypothermia Center ( medical intensive care unit of a university hospital) Patients or participants: Nineteen patients who were qualified for ECMO in Severe Accidental Hypothermia Center Intervention: At least three times a day rehabilitation session (physiotherapeutic procedures adequate to patient problems) and interventions in case of emergency...
2016: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/27714086/1d-ni-co-oxide-and-sulfide-nanoarray-carbon-aerogel-hybrid-nanostructures-for-asymmetric-supercapacitors-with-high-energy-density-and-excellent-cycling-stability
#9
Pin Hao, Jian Tian, Yuanhua Sang, Chia-Chi Tuan, Guanwei Cui, Xifeng Shi, C P Wong, Bo Tang, Hong Liu
The fabrication of supercapacitor electrodes with high energy density and excellent cycling stability is still a great challenge. A carbon aerogel, possessing a hierarchical porous structure, high specific surface area and electrical conductivity, is an ideal backbone to support transition metal oxides and bring hope to prepare electrodes with high energy density and excellent cycling stability. Therefore, NiCo2S4 nanotube array/carbon aerogel and NiCo2O4 nanoneedle array/carbon aerogel hybrid supercapacitor electrode materials were synthesized by assembling Ni-Co precursor needle arrays on the surface of the channel walls of hierarchical porous carbon aerogels derived from chitosan in this study...
September 15, 2016: Nanoscale
https://www.readbyqxmd.com/read/27697728/an-easy-to-use-liquid-chromatography-assay-for-the-analysis-of-lamotrigine-in-rat-plasma-and-brain-samples-using-microextraction-by-packed-sorbent-application-to-a-pharmacokinetic-study
#10
Sandra Ventura, Márcio Rodrigues, Sarah Pousinho, Amílcar Falcão, Gilberto Alves
A simple and rapid high-performance liquid chromatography method with diode-array detection (HPLC-DAD) using microextraction by packed sorbent (MEPS) during the sample preparation step was developed and validated to quantify lamotrigine (LTG) in rat plasma and brain samples. MEPS variables such as pH, number of draw-eject cycles, and washing and desorption conditions were optimized. The chromatographic resolution of LTG and chloramphenicol, used as internal standard (IS), was accomplished in less than 5min on a C18 column, at 35°C, using an isocratic elution with acetonitrile (13%), methanol (13%) and water-triethylamine (99...
November 1, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27697398/reconstruction-of-the-maxilla-following-hemimaxillectomy-defects-with-scapular-tip-grafts-and-dental-implants
#11
Christian Mertens, Christian Freudlsperger, Jens Bodem, Michael Engel, Jürgen Hoffmann, Kolja Freier
BACKGROUND: Treatment of post-resective defects of the maxilla can be challenging and usually requires dental obturation or microvascular reconstruction. As compared to soft-tissue microvascular grafts, bone reconstruction can additionally allow for facial support and retention of dental implants. The aim of this study was to evaluate scapular tip grafts with respect to their applicability for maxillary reconstruction and their potential to retain dental implants for later dental rehabilitation...
November 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27681199/effects-of-nanoporous-carbon-derived-from-microalgae-and-its-coo-composite-on-capacitance
#12
Meng Zhou, Joshua Catanach, Joshua Gomez, Stephanie Richins, Shuguang Deng
Nanoporous carbon was synthesized from microalgae as a promising electrode material for electric double layer capacitors due to its large specific surface area and controllable pore structures. The pore textural properties of the algae-derived-carbon (ADC) samples were measured by N2 adsorption and desorption at 77 K. The performance of the activated carbon (AC) as supercapacitor electrodes was determined by the cyclic voltammetry and galvanostatic charge/discharge tests. The effect of the nanoporous carbon structure on capacitance was demonstrated by calculating the contributions of micropores and mesopores toward capacitance...
September 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27663677/implant-prosthetic-rehabilitation-of-hemimaxillectomy-defects-with-cad-cam-suprastructures
#13
Christian Mertens, Jose de San Jose Gonzalez, Christian Freudlsperger, Jens Bodem, Johannes Krisam, Jürgen Hoffmann, Michael Engel
BACKGROUND: Patients with hemimaxillectomy defects after tumor surgery can alternatively be rehabilitated with dental obturators or microvascular flaps. When general medical or oncologic conditions do not permit microvascular surgery, dental obturators are the only solution, yet retention for edentulous patients is often poor. The aim of this study was to evaluate whether CAD/CAM suprastructures supported by implants placed in both residual alveolar ridges and contralateral zygomatic bone could enhance obturator stability and improve functional outcomes...
November 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27629986/building-better-lithium-sulfur-batteries-from-lino3-to-solid-oxide-catalyst
#14
Ning Ding, Lan Zhou, Changwei Zhou, Dongsheng Geng, Jin Yang, Sheau Wei Chien, Zhaolin Liu, Man-Fai Ng, Aishui Yu, T S Andy Hor, Michael B Sullivan, Yun Zong
Lithium nitrate (LiNO3) is known as an important electrolyte additive in lithium-sulfur (Li-S) batteries. The prevailing understanding is that LiNO3 reacts with metallic lithium anode to form a passivation layer which suppresses redox shuttles of lithium polysulfides, enabling good rechargeability of Li-S batteries. However, this view is seeing more challenges in the recent studies, and above all, the inability of inhibiting polysulfide reduction on Li anode. A closely related issue is the progressive reduction of LiNO3 on Li anode which elevates internal resistance of the cell and compromises its cycling stability...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27610456/evaluation-and-stability-of-pedot-polymer-electrodes-for-li-o2-batteries
#15
Chibueze V Amanchukwu, Magali Gauthier, Thomas P Batcho, Chanez Symister, Yang Shao-Horn, Julio M D'Arcy, Paula T Hammond
Lithium-air (O2) batteries have shown great promise because of their high gravimetric energy density-an order of magnitude greater than Li-ion-but challenges such as electrolyte and electrode instability have led to poor capacity retention and low cycle life. Positive electrodes such as carbon and inorganic metal oxides have been heavily explored, but the degradation of carbon and the limited surface area of the metal oxides limit their practical use. In this work, we study the electron-conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) and show it can support oxygen reduction to form Li2O2 in a nonaqueous environment...
October 6, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27591838/an-assessment-of-the-long-term-persistence-of-prion-infectivity-in-aquatic-environments
#16
Alba Marín-Moreno, Juan-Carlos Espinosa, Natalia Fernández-Borges, Juan Píquer, Rosina Girones, Olivier Andreoletti, Juan-María Torres
The environment plays a key role in horizontal transmission of prion diseases, since prions are extremely resistant to classical inactivation procedures. In prior work, we observed the high stability of bovine spongiform encephalopathy (BSE) infectivity when these prions were incubated in aqueous media such as phosphate-buffered saline (PBS) or wastewater for nearly nine months. As a continuation of this experiment, the same samples were maintained in PBS or wastewater for five additional years and residual BSE infectivity was assessed in bovine PrP(C) transgenic mice...
November 2016: Environmental Research
https://www.readbyqxmd.com/read/27585782/a-22-year-follow-up-of-the-nonsurgical-expansion-of-maxillary-and-mandibular-arches-in-a-young-adult-are-the-outcomes-stable-relapsed-or-unstable-with-aging
#17
José Valladares-Neto, Karine Evangelista, Hianne Miranda de Torres, Matheus Melo Pithon, Maria Alves Garcia Santos Silva
Adult maxillary and mandible arch expansion without a surgical approach can be uncertain when long-term stability is considered. This case report describes the treatment of a 19-year-old woman with an Angle Class I malocclusion with constricted maxillary and mandibular arches. The patient's main complaint was mandibular anterior crowding. The treatment plan included expansion of the mandibular arch concurrent with semirapid maxillary expansion. An edgewise appliance was used to adjust the final occlusion. Smile esthetics and dental alignment were improved without straightening the profile...
September 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27554984/determination-of-mln0128-an-investigational-antineoplastic-agent-in-human-plasma-by-lc-ms-ms
#18
Sandeep R Kunati, Yan Xu
MLN0128, an mTOR kinase inhibitor, is currently undergoing clinical investigation for treatment of a variety of cancers. To support this work, an LC-MS/MS method has been developed for determination of MLN0128 in human plasma. A structural analog STK040263 was used as the internal standard. Both MLN0128 and the IS were first extracted from plasma using methyl tert-butyl ether; then separated on a Waters XTerra® MS C18 column using a mobile phase consisting of methanol/acetonitrile/10.0 mM ammonium formate (34:6:60, v/v/v) at a flow rate of 0...
August 24, 2016: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/27518834/representations-of-temporal-information-in-short-term-memory-are-they-modality-specific
#19
Daniel Bratzke, Katrina R Quinn, Rolf Ulrich, Karin M Bausenhart
Rattat and Picard (2012) reported that the coding of temporal information in short-term memory is modality-specific, that is, temporal information received via the visual (auditory) modality is stored as a visual (auditory) code. This conclusion was supported by modality-specific interference effects on visual and auditory duration discrimination, which were induced by secondary tasks (visual tracking or articulatory suppression), presented during a retention interval. The present study assessed the stability of these modality-specific interference effects...
October 2016: Acta Psychologica
https://www.readbyqxmd.com/read/27488853/supercapacitors-based-on-reduced-graphene-oxide-nanofibers-supported-ni-oh-2-nanoplates-with-enhanced-electrochemical-performance
#20
Chaoqi Zhang, Qidi Chen, Hongbing Zhan
Pseudocapacitive materials are critical to the development of supercapacitors but usually suffer from poor conductivity and bad cycling property. Here, we describe the production of novel graphene oxide nanofibers (GONFs) via a partial oxidization and exfoliation method and concurrently report that highly crystallized Ni(OH)2 nanoplates uniformly grow on reduced GONFs' outer graphene nanosheets through the hydrothermal method. Because of their unique structure with high electric conductivity, the rGONF/Ni(OH)2 composite exhibits superior specific capacitance (SC), favorable rate capability and enhanced cycling stability relative to other composites or hybrids, e...
September 7, 2016: ACS Applied Materials & Interfaces
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