Base de dados : MEDLINE
Pesquisa : D01.200 [Categoria DeCS]
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[PMID]:28511647
[Au] Autor:Thakur M; Boudewijns EA; Babu GR; Winkens B; de Witte LP; Gruiskens J; Sushama P; Ghergu CT; van Schayck OCP
[Ad] Endereço:Department of Family Medicine, Care and Public Health Research Institute (CAPHRI), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, the Netherlands. meghathakur@iiphh.org.
[Ti] Título:Low-smoke chulha in Indian slums: study protocol for a randomised controlled trial.
[So] Source:BMC Public Health;17(1):454, 2017 May 16.
[Is] ISSN:1471-2458
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Biomass fuel is used as a primary cooking source by more than half of the world's population, contributing to a high burden of disease. Although cleaner fuels are available, some households continue using solid fuels because of financial constraints and absence of infrastructure, especially in non-notified slums. The present study documents a randomised controlled study investigating the efficacy of improved cookstove on the personal exposure to air pollution and the respiratory health of women and children in an Indian slum. The improved cookstove was based on co-creation of a low-smoke chulha with local communities in order to support adaption and sustained uptake. METHODS: The study will be conducted in a non-notified slum called Ashrayanagar in Bangalore, India. The study design will be a 1:1 randomised controlled intervention trial, including 250 households. The intervention group will receive an improved cookstove (low-smoke chulha) and the control group will continue using either the traditional cookstove (chulha) or a combination of the traditional stove and the kerosene/diesel stove. Follow-up time is 1 year. Outcomes include change in lung function (FEV FVC), incidence of pneumonia, change in personal PM and CO exposure, incidence of respiratory symptoms (cough, phlegm, wheeze and shortness of breath), prevalence of other related symptoms (headache and burning eyes), change in behaviour and adoption of the stove. Ethical clearance was obtained from the Institutional Ethics Committee of the Indian Institute of Public Health Hyderabad- Bengaluru Campus. DISCUSSION: The findings from this study aim to provide insight into the effects of improved cookstoves in urban slums. Results can give evidence for the decrease of indoor air pollution and the improvement of respiratory health for children and women. TRIAL REGISTRATION: The trial was registered with clinicaltrials.gov on 21 June 2016 with the identifier NCT02821650 ; A Study to Test the Impact of an Improved Chulha on the Respiratory Health of Women and Children in Indian Slums.
[Mh] Termos MeSH primário: Poluição do Ar em Ambientes Fechados/análise
Poluição do Ar em Ambientes Fechados/prevenção & controle
Culinária/métodos
Áreas de Pobreza
Fumaça/análise
Fumaça/prevenção & controle
[Mh] Termos MeSH secundário: Adulto
Compostos Inorgânicos de Carbono/análise
Criança
Feminino
Seres Humanos
Índia
Material Particulado/análise
Pneumonia/epidemiologia
Projetos de Pesquisa
Testes de Função Respiratória
Sulfetos/análise
População Urbana
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Particulate Matter); 0 (Smoke); 0 (Sulfides); 2944-05-0 (carbon sulfide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170518
[St] Status:MEDLINE
[do] DOI:10.1186/s12889-017-4369-6


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[PMID]:28371425
[Au] Autor:Lin H; Zhang W; Shi Z; Che M; Yu X; Tang Y; Gao Q
[Ad] Endereço:Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P.R. China.
[Ti] Título:Electrospinning Hetero-Nanofibers of Fe C-Mo C/Nitrogen-Doped-Carbon as Efficient Electrocatalysts for Hydrogen Evolution.
[So] Source:ChemSusChem;10(12):2597-2604, 2017 Jun 22.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Heterostructured electrocatalysts with multiple active components are expected to synchronously address the two elementary steps in the hydrogen evolution reaction (HER), which require varied hydrogen-binding strength on the catalyst surface. Herein, electrospinning followed by a pyrolysis is introduced to design Fe C-Mo C/nitrogen-doped carbon (Fe C-Mo C/NC) hetero-nanofibers (HNFs) with tunable composition, leading to abundant Fe C-Mo C hetero-interfaces for synergy in electrocatalysis. Owing to the strong hydrogen binding on Mo C and the relatively weak one on Fe C, the hetero-interfaces of Fe C-Mo C remarkably promote HER kinetics and intrinsic activity. Additionally, the loose and porous N-doped carbon matrix, as a result of Fe-catalyzed carbonization, ensures the fast transport of electrolytes and electrons, thus minimizing diffusion limitation. As expected, the optimized Fe C-Mo C/NC HNFs afforded a low overpotential of 116 mV at a current density of -10 mA cm and striking kinetics metrics (onset overpotential: 42 mV, Tafel slope: 43 mV dec ) in 0.5 m H SO , outperforming most recently reported noble-metal-free electrocatalysts.
[Mh] Termos MeSH primário: Compostos Inorgânicos de Carbono/química
Carbono/química
Hidrogênio/química
Compostos de Ferro/química
Molibdênio/química
Nanofibras/química
Nanotecnologia/métodos
Nitrogênio/química
[Mh] Termos MeSH secundário: Catálise
Eletricidade
Eletroquímica
Porosidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Iron Compounds); 0 (iron carbide); 0 (molybdenum carbide); 7440-44-0 (Carbon); 7YNJ3PO35Z (Hydrogen); 81AH48963U (Molybdenum); N762921K75 (Nitrogen)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170726
[Lr] Data última revisão:
170726
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170404
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700207


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[PMID]:28343056
[Au] Autor:Ma R; Yuan N; Sun S; Zhang P; Fang L; Zhang X; Zhao X
[Ad] Endereço:College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
[Ti] Título:Preliminary investigation of the microwave pyrolysis mechanism of sludge based on high frequency structure simulator simulation of the electromagnetic field distribution.
[So] Source:Bioresour Technol;234:370-379, 2017 Jun.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Under microwave irradiation, raw sludge was pyrolyzed mainly by evaporation of water, with a weight loss ratio of 84.8% and a maximum temperature not exceeding 200°C. High-temperature pyrolysis of SiC sludge could be realized, with a weight loss ratio of 93.4% and a final pyrolysis temperature of 1131.7°C. Variations between the electric field intensity distribution are the main reason for the differences of pyrolysis efficiencies. HFSS simulation showed that the electric field intensity of the raw sludge gradually decreased from 2.94×10 V/m to 0.88×10 V/m when pyrolysis ends, while that of SiC sludge decreased from 3.73×10 V/m at the beginning to 1.28×10 V/m, then increased to 4.03×10 V/m. The electromagnetic effect is the main factor (r≥0.91) influencing the temperature increase and weight loss of raw sludge. Both the electromagnetic effect and heat conduction effect influenced temperature rise and weight loss of SiC sludge, but the former's influence was comparatively larger.
[Mh] Termos MeSH primário: Esgotos/química
[Mh] Termos MeSH secundário: Compostos Inorgânicos de Carbono/química
Dessecação
Campos Eletromagnéticos
Temperatura Alta
Micro-Ondas
Compostos de Silício/química
Gerenciamento de Resíduos/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Sewage); 0 (Silicon Compounds); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170515
[Lr] Data última revisão:
170515
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170327
[St] Status:MEDLINE


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[PMID]:28276732
[Au] Autor:Barth JAC; Mader M; Nenning F; van Geldern R; Friese K
[Ad] Endereço:a Department of Geography and Geosciences, GeoZentrum Nordbayern , Friedrich-Alexander University Erlangen-Nuremberg (FAU) , Erlangen , Germany.
[Ti] Título:Stable isotope mass balances versus concentration differences of dissolved inorganic carbon - implications for tracing carbon turnover in reservoirs.
[So] Source:Isotopes Environ Health Stud;53(4):413-426, 2017 Aug.
[Is] ISSN:1477-2639
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to identify sources of carbon turnover using stable isotope mass balances. For this purpose, two pre-reservoirs in the Harz Mountains (Germany) were investigated for their dissolved and particulate carbon contents (dissolved inorganic carbon (DIC), dissolved organic carbon, particulate organic carbon) together with their stable carbon isotope ratios. DIC concentration depth profiles from March 2012 had an average of 0.33 mmol L . Increases in DIC concentrations later on in the year often corresponded with decreases in its carbon isotope composition (δ C ) with the most negative value of -18.4 ‰ in September. This led to a carbon isotope mass balance with carbon isotope inputs of -28.5 ‰ from DOC and -23.4, -31.8 and -30.7 ‰ from algae, terrestrial and sedimentary matter, respectively. Best matches between calculated and measured DIC gains were achieved when using the isotope composition of algae. This shows that this type of organic material is most likely responsible for carbon additions to the DIC pool when its concentrations and δ C values correlate negatively. The presented isotope mass balance is transferable to other surface water and groundwater systems for quantification of organic matter turnover.
[Mh] Termos MeSH primário: Compostos Inorgânicos de Carbono/análise
Isótopos de Carbono/análise
Monitoramento Ambiental
Água Doce/química
Sedimentos Geológicos/análise
[Mh] Termos MeSH secundário: Altitude
Compostos Inorgânicos de Carbono/química
Precipitação Química
Alemanha
Água Subterrânea/análise
Água Subterrânea/química
Chuvas/química
Solubilidade
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Carbon Isotopes)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170808
[Lr] Data última revisão:
170808
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170310
[St] Status:MEDLINE
[do] DOI:10.1080/10256016.2017.1282478


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[PMID]:28116827
[Au] Autor:Zhao G; Fan S; Pan X; Chen P; Liu Y; Lu Y
[Ad] Endereço:Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P.R. China.
[Ti] Título:Reaction-Induced Self-Assembly of CoO@Cu O Nanocomposites In Situ onto SiC-Foam for Gas-Phase Oxidation of Bioethanol to Acetaldehyde.
[So] Source:ChemSusChem;10(7):1380-1384, 2017 Apr 10.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A high-performance SiC-foam-structured nanocomposite catalyst of CoO@Cu O (i.e., 50-100 nm CoO partially covered with ca. 10 nm Cu O) was engineered from nano- to macro-scales in one step for the high-throughput gas-phase aerobic oxidation of bioethanol to acetaldehyde. This special CoO@Cu O nanostructure shows much higher activity/selectivity than other binary metal-oxide assemblies such as CuO &CoO nano-mixtures or inverse Cu O@CoO nanostructures. The catalyst was facilely but exclusively obtainable by in situ reaction-induced transformation of the respective metal nitrates supported on SiC-foam into the CoO@Cu O nanostructure in the reaction stream. It achieved 95 % conversion with 98 % selectivity under mild conditions and was stable for at least 150 h for a feed of 20 vol % ethanol (much higher than in the literature: 1-6 vol %) at a high EtOH weight hourly space velocity of 8.5 h . Abundant Cu O-CoO interfaces and high stability of the CoO@Cu O nanostructure were responsible for the high activity/selectivity and promising stability in this reaction.
[Mh] Termos MeSH primário: Acetaldeído/química
Compostos Inorgânicos de Carbono/química
Cobalto/química
Cobre/química
Etanol/química
Gases/química
Nanoestruturas/química
Óxidos/química
Compostos de Silício/química
[Mh] Termos MeSH secundário: Oxirredução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Gases); 0 (Oxides); 0 (Silicon Compounds); 3G0H8C9362 (Cobalt); 3K9958V90M (Ethanol); 789U1901C5 (Copper); GO1N1ZPR3B (Acetaldehyde); T8BEA5064F (cuprous oxide); USK772NS56 (cobalt oxide); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170606
[Lr] Data última revisão:
170606
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170125
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201601848


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[PMID]:27997868
[Au] Autor:Chen Y; Wang F; Jia Y; Yang N; Zhang X
[Ad] Endereço:School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China. Electronic address: yg_chen80@sina.com.
[Ti] Título:One-step ethanolysis of lignin into small-molecular aromatic hydrocarbons over nano-SiC catalyst.
[So] Source:Bioresour Technol;226:145-149, 2017 Feb.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Catalytic depolymerization of lignin for preparation of aromatic hydrocarbons without external hydrogen was first carried out over nano-SiC catalyst in supercritical ethanol. Mixture of the catalyst and lignin was innovatively suspended in a closed reactor and small-molecular aromatic hydrocarbons were successfully achieved at 500°C. Results revealed that not only did conversion of lignin increase sharply under the nano-SiC catalyst, but also phenols were not detected. The increase of residence time under the Fe-SiC catalyst did not change distribution of the liquid products besides the yield improvement, suggesting that the catalyst was suitable and selective towards formation of small-molecular benzenes, especially C -C benzenes. Preliminary studies found that lignin depolymerization and deoxygenation were successfully fulfilled during the reactions, which provided a very effective route to conversion of lignin into high added-value molecules as transportation fuel additives.
[Mh] Termos MeSH primário: Compostos Inorgânicos de Carbono/química
Hidrocarbonetos Aromáticos/química
Lignina/química
Nanoestruturas/química
Compostos de Silício/química
[Mh] Termos MeSH secundário: Catálise
Etanol/química
Hidrogênio/química
Fenóis/análise
Fenóis/química
Polimerização
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Hydrocarbons, Aromatic); 0 (Phenols); 0 (Silicon Compounds); 3K9958V90M (Ethanol); 7YNJ3PO35Z (Hydrogen); 9005-53-2 (Lignin); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161221
[St] Status:MEDLINE


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[PMID]:27987666
[Au] Autor:Roushani M; Nezhadali A; Jalilian Z; Azadbakht A
[Ad] Endereço:Department of Chemistry, Ilam University, Ilam, Iran. Electronic address: mahmoudroushani@yahoo.com.
[Ti] Título:Development of novel electrochemical sensor on the base of molecular imprinted polymer decorated on SiC nanoparticles modified glassy carbon electrode for selective determination of loratadine.
[So] Source:Mater Sci Eng C Mater Biol Appl;71:1106-1114, 2017 Feb 01.
[Is] ISSN:1873-0191
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A novel and selective electrochemical sensor was successfully developed for the determination of loratadine by drop coating of synthesized loratadine molecularly imprinted polymers on the surface of glassy carbon electrode modified with silicon carbide nanoparticles. The performance of the constructed sensor was evaluated by cyclic voltammetry, scanning electron microscopy, and electrochemical impedance spectroscopy techniques. Under optimized conditions, the resulting calibration curve exhibited a linear response within a concentration range of 1-33µM with a low detection limit (S/N=3) of 0.15µM. Finally, the proposed method was successfully applied as a selective, stabile, sensitive, simple, reproducibility electrochemical sensor with good repeatability for the determination of loratadine in real samples and satisfactory results were obtained.
[Mh] Termos MeSH primário: Compostos Inorgânicos de Carbono/química
Espectroscopia Dielétrica
Loratadina/análise
Impressão Molecular
Nanopartículas/química
Compostos de Silício/química
[Mh] Termos MeSH secundário: Eletrodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Silicon Compounds); 7AJO3BO7QN (Loratadine); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170926
[Lr] Data última revisão:
170926
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161219
[St] Status:MEDLINE


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[PMID]:27628329
[Au] Autor:Boffetta P; Hashim D
[Ad] Endereço:Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA. paolo.boffetta@gmail.com.
[Ti] Título:Exposure to silicon carbide and cancer risk: a systematic review.
[So] Source:Int Arch Occup Environ Health;90(1):1-12, 2017 Jan.
[Is] ISSN:1432-1246
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:PURPOSE: To conduct a systematic review of epidemiologic studies on risk of cancer from exposure to silicon carbide (SiC). METHODS: We followed established guidelines to search electronic databases for studies on populations exposed to SiC. We conducted meta-analyses when the data justified it. RESULTS: We identified two studies of SiC production workers and several studies of users. The studies of production workers indicated an increased risk of lung cancer. The increased risk was restricted to workers with elevated dust exposure and, in the most informative study from Norway, was linked to estimated cristobalite exposure, a form of crystalline silica. Increased risk was not linked to SiC particles, once cristobalite exposure was controlled for. Studies of SiC users in various industries did not reveal an increased risk of lung cancer. CONCLUSIONS: The increased risk of lung cancer detected in the SiC production industry appears to be associated with high exposure levels to total dust, including crystalline silica and cristobalite which occurred in this industry in the past decades. It may not persist under current exposure circumstances, characterized by lower levels and use of personal protection equipment. Commercial users of SiC-based products were not affected.
[Mh] Termos MeSH primário: Compostos Inorgânicos de Carbono/toxicidade
Neoplasias Pulmonares/induzido quimicamente
Indústria Manufatureira
Doenças Profissionais/induzido quimicamente
Exposição Ocupacional/efeitos adversos
Compostos de Silício/toxicidade
[Mh] Termos MeSH secundário: Poeira
Seres Humanos
Fatores de Risco
Dióxido de Silício/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; REVIEW
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Dust); 0 (Silicon Compounds); 7631-86-9 (Silicon Dioxide); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171005
[Lr] Data última revisão:
171005
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160916
[St] Status:MEDLINE
[do] DOI:10.1007/s00420-016-1169-8


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[PMID]:28517917
[Au] Autor:Borkowski A; Owczarek F; Szala M; Selwet M
[Ti] Título:Interaction of Gram-Positive and Gram-Negative Bacteria with Ceramic Nanomaterials Obtained by Combustion Synthesis ­ Adsorption and Cytotoxicity Studies.
[So] Source:Pol J Microbiol;65(2):161-70, 2016.
[Is] ISSN:1733-1331
[Cp] País de publicação:Poland
[La] Idioma:eng
[Ab] Resumo:This paper presents the interactions of Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas putida) bacteria with ceramic materials obtained by combustion synthesis. These studies were conducted based on an analysis of the adsorption of bacteria onto aggregates of ceramic materials in an aqueous suspension. The materials used in the studies were of a nanostructured nature and consisted mainly of carbides: silicon carbide (SiC) in the form of nanofibers (NFs) and nanorods (NRs), titanium carbide, and graphite, which can also be formed by combustion synthesis. Micrometric SiC was used as a reference material. Gram-positive bacteria adsorbed more strongly to these materials. It seems that both the point of zero charge value and the texture of the ceramic material affected the bacterial adsorption process. Additionally, the viability of bacteria adsorbed onto aggregates of the materials decreased. Generally, P. putida cells were more sensitive to the nanomaterials than S. aureus cells. The maximum loss of viability was noted in the case of bacteria adsorbed onto NRSiC and NFSiC aggregates.
[Mh] Termos MeSH primário: Cerâmica
Nanoestruturas
Pseudomonas putida/fisiologia
Staphylococcus aureus/fisiologia
[Mh] Termos MeSH secundário: Adsorção
Aderência Bacteriana
Compostos Inorgânicos de Carbono
Viabilidade Microbiana
Microscopia Eletrônica de Varredura
Compostos de Silício
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Silicon Compounds); WXQ6E537EW (silicon carbide)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170619
[Lr] Data última revisão:
170619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170519
[St] Status:MEDLINE


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[PMID]:27752178
[Au] Autor:Chen H; Zhao T; Wang Y; Sun YC
[Ad] Endereço:Center for Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health &a
[Ti] Título:[Computer aided design and 3-dimensional printing for the production of custom trays of maxillary edentulous jaws based on 3-dimensional scan of primary impression].
[So] Source:Beijing Da Xue Xue Bao Yi Xue Ban;48(5):900-904, 2016 10 18.
[Is] ISSN:1671-167X
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:OBJECTIVE: To establish a digital method for production of custom trays for edentulous jaws using fused deposition modeling (FDM) based on three-dimensional (3D) scans of primary jaw impressions, and to quantitatively evaluate the accuracy. METHODS: A red modeling compound was used to make a primary impression of a standard maxillary edentulous plaster model. The plaster model data and the primary impression tissue surface data were obtained using a 3D scanner. In the Gemomagic 2012 software, several commands were used, such as interactive drawing curves, partial filling holes, local offset, bodily offset, bodily shell, to imitate clinical procedures of drawing tray boundary, filling undercut, buffer, and generating the tray body. A standard shape of tray handle was designed and attached to the tray body and the data saved as stereolithography (STL) format. The data were imported into a computer system connected to a 3D FDM printing device, and the custom tray for the edentulous jaw model was printed layer upon layer at 0.2 mm/layer, using polylactic acid (PLA) filament, the tissue surface of the tray was then scanned with a 3D scanner. The registration functions of Geomagic 2012 was used to register the 3-dimentional surface data, and the point-cloud deviation analysis function of the Imageware 13.0 system was used to analyze the error. The CAD data of the custom tray was registered to the scan data, and the error between them was analyzed. The scanned plaster model surface was registered to the scanned impression surface and the scanned tray data to the CAD data, then the distance between the surface of plaster model and the scanned tissue surface of the custom tray was measured in Imageware 13.0. RESULTS: The deviation between the computer aided design data and the scanned data of the custom tray was (0.17±0.20) mm, with (0.19±0.18) mm in the primary stress-bearing area, (0.17±0.22) mm in the secondary stress-bearing area, (0.30±0.29) mm in the border seal area, (0.08±0.06) mm in the buffer area; the space between the tissue faces of the plaster model and the scanned tissue surface of custom tray was (1.98±0.40) mm, with (1.85±0.24) mm in the primary stress-bearing area, (1.86±0.26) mm in the secondary stress-bearing area, (1.77±0.36) mm in the border seal area, (2.90±0.26) mm in the buffer area. CONCLUSION: With 3D scanning, computer aided design and FDM technology, an efficient means of custom tray production was established.
[Mh] Termos MeSH primário: Projeto Auxiliado por Computador
Técnica de Moldagem Odontológica/instrumentação
Impressão Tridimensional
[Mh] Termos MeSH secundário: Compostos Inorgânicos de Carbono
Seres Humanos
Imagem Tridimensional/instrumentação
Imagem Tridimensional/métodos
Arcada Edêntula
Ácido Láctico
Maxila
Polímeros
Impressão Tridimensional/instrumentação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Carbon Compounds, Inorganic); 0 (Polymers); 0 (carbon-polylactic acid polymer); 33X04XA5AT (Lactic Acid)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161019
[St] Status:MEDLINE



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