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  1 / 1627 MEDLINE  
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[PMID]:29342150
[Au] Autor:Takematsu E; Noguchi K; Kuroda K; Ikoma T; Niinomi M; Matsushita N
[Ad] Endereço:Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, United States of America.
[Ti] Título:In vivo osteoconductivity of surface modified Ti-29Nb-13Ta-4.6Zr alloy with low dissolution of toxic trace elements.
[So] Source:PLoS One;13(1):e0189967, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Simulated Body Fluid (SBF) has served as a useful standard to check the bioactivity of implant materials for years. However, it is not perfectly able to imitate human serum; sometimes disparities between the SBF test and animal test were confirmed. Therefore, to ensure the reliability of the results of the SBF test obtained from our previous study, an animal study was performed to check osteoconductivity of surface modified implant materials. Three types of solution processes, hydrothermal (H), electrochemical (E), and hydrothermal-electrochemical (HE), were performed on the Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) to improve its bioactivity, and their bioactivities were measured in vivo using bone-implant contacts (BICs). BICs of the HE- and H-treated samples were significantly higher than that of the control. Metal ion diffusion towards the bone was also evaluated to examine the adverse effect of metal ions. No metal ion diffusion was observed, indicating the safety of our solution processed implant materials.
[Mh] Termos MeSH primário: Regeneração Óssea
Nióbio/química
Tantálio/química
Titânio/química
Oligoelementos/farmacocinética
Zircônio/química
[Mh] Termos MeSH secundário: Animais
Ratos
Ratos Sprague-Dawley
Solubilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Ti-29Nb-13Ta-4.6Zr alloy); 0 (Trace Elements); 05175J654G (Niobium); 6424HBN274 (Tantalum); C6V6S92N3C (Zirconium); D1JT611TNE (Titanium)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180118
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189967


  2 / 1627 MEDLINE  
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[PMID]:27776898
[Au] Autor:Hu B; Chen Y; Zhu H; Wu H; Yan S
[Ad] Endereço:Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
[Ti] Título:Cementless Porous Tantalum Monoblock Tibia vs Cemented Modular Tibia in Primary Total Knee Arthroplasty: A Meta-Analysis.
[So] Source:J Arthroplasty;32(2):666-674, 2017 02.
[Is] ISSN:1532-8406
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: With the introduction of new fixation systems and designs, there has been a recent reemergence of interest in cementless fixation of the tibial component in total knee arthroplasty. However, little is known regarding the clinical features and survivorship of the cementless porous tantalum monoblock tibial component compared to the conventional cemented modular tibial component. METHODS: We conducted a literature search of multiple databases for comparative studies published before June 2015 that investigated the outcomes of cementless porous tantalum monoblock tibia vs conventional cemented modular tibia. A pooled analysis was performed. The outcomes of interest were postoperative functional score, range of motion, Western Ontario and McMaster University Osteoarthritis Index, total complications, reoperation, radiolucent lines, loosening of the tibial component, and length of operation. RESULTS: Six studies involving 977 patients were eligible for the meta-analysis. The use of a cementless porous tantalum monoblock tibial component may associate with a slightly higher functional score, fewer radiolucent lines, and shorter operation. No significant difference was seen in regard to the range of motion, Western Ontario and McMaster University Osteoarthritis Index, total complications, reoperation, and loosening of the component between the 2 groups. CONCLUSION: However, due to variation among the included studies, the use of cementless porous tantalum monoblock tibia seems to achieve no substantial superiority over that of the conventional cemented modular tibia at 5-year follow-up. Data concerning the long-term prognosis of this novel implant should continue to be collected and analyzed.
[Mh] Termos MeSH primário: Artroplastia do Joelho/instrumentação
Articulação do Joelho/cirurgia
Prótese do Joelho
Desenho de Prótese
Tíbia/cirurgia
[Mh] Termos MeSH secundário: Cimentos para Ossos
Seres Humanos
Porosidade
Amplitude de Movimento Articular
Reoperação
Tantálio
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; REVIEW; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Bone Cements); 6424HBN274 (Tantalum)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171225
[Lr] Data última revisão:
171225
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE


  3 / 1627 MEDLINE  
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[PMID]:28860394
[Au] Autor:Harrison PL; Harrison T; Stockley I; Smith TJ
[Ad] Endereço:Sheffield Hallam University, Howard Street, Sheffield S1 1WB, UK.
[Ti] Título:Does tantalum exhibit any intrinsic antimicrobial or antibiofilm properties?
[So] Source:Bone Joint J;99-B(9):1153-1156, 2017 Sep.
[Is] ISSN:2049-4408
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:AIMS: Tantalum (Ta) trabecular metal components are increasingly used to reconstruct major bone defects in revision arthroplasty surgery. It is known that some metals such as silver have antibacterial properties. Recent reports have raised the question regarding whether Ta components are protective against infection in revision surgery. This laboratory study aimed to establish whether Ta has intrinsic antibacterial properties against planktonic bacteria, or the ability to inhibit biofilm formation. MATERIALS AND METHODS: Equal-sized pieces of Ta and titanium (Ti) acetabular components were sterilised and incubated with a low dose inoculum of either or for 24 hours. After serial dilution, colony forming units (cfu) were quantified on Mueller-Hinton agar plates. In order to establish whether biofilms formed to a greater extent on one material than the other, these Ta and Ti pieces were then washed twice, sonicated and washed again to remove loosely adhered planktonic bacteria. They were then re-incubated for 24 hours prior to quantifying the number of cfu. All experiments were performed in triplicate. RESULTS: More than 1x10 cfu/ml were observed in both the Ta and Ti experiments. After washing and sonication, more than 2x10 cfu/ml were observed for both Ta and Ti groups. The results were the same for both and . CONCLUSION: Compared with Ti controls, Ta did not demonstrate any intrinsic antibacterial activity or ability to inhibit biofilm formation. Hence, intrinsic antimicrobial properties of Ta do not account for the previously observed reduction in the frequency of subsequent infections when Ta was used in revision procedures. Cite this article: 2017;99-B:1153-6.
[Mh] Termos MeSH primário: Artroplastia de Quadril
Biofilmes/efeitos dos fármacos
Prótese de Quadril/microbiologia
Infecções Relacionadas à Prótese/microbiologia
Infecções Relacionadas à Prótese/prevenção & controle
Tantálio/farmacologia
Titânio/farmacologia
[Mh] Termos MeSH secundário: Aderência Bacteriana
Reoperação
Sonicação
Staphylococcus aureus/efeitos dos fármacos
Staphylococcus epidermidis/efeitos dos fármacos
Células-Tronco
Esterilização
Propriedades de Superfície
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
6424HBN274 (Tantalum); D1JT611TNE (Titanium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170902
[St] Status:MEDLINE
[do] DOI:10.1302/0301-620X.99B9.BJJ-2016-1309.R1


  4 / 1627 MEDLINE  
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[PMID]:28759448
[Au] Autor:Gao J; Yan J; Liu Y; Zhang J; Guo Z
[Ad] Endereço:Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan 030051, Shanxi Province, China E-mail: zbgaojing@163.com.
[Ti] Título:A novel electro-catalytic degradation method of phenol wastewater with Ti/IrO -Ta O anodes in high-gravity fields.
[So] Source:Water Sci Technol;76(3-4):662-670, 2017 Jul.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In the electro-catalytic degradation process of phenol wastewater, bubbles and mass transfer limitation will result in the decrease in wastewater degradation efficiency, a long electrolysis time and a high energy consumption. Self-made Ti/IrO -Ta O anodes and a high-gravity electro-catalytic reactor were used to improve them. The Ti/IrO -Ta O anode was prepared with a thermal decomposition method and characterized by scanning electron microscopy (SEM). Under optimum conditions, the removal efficiencies of phenol, total organic carbon (TOC) and chemical oxygen demand (COD) respectively reached 94.77%, 50.96% and 41.2% after 2 h electrolysis in the high-gravity field, which were respectively 10.93%, 16.72% and 24.84% higher than those in the normal gravity field. For about the same removal efficiencies, the electrolysis time and energy consumed in the high-gravity field were 33.3% and 15.4% lower than those consumed in the normal gravity field, respectively. The degradation pathway of phenol detected by high performance liquid chromatography (HPLC) was unchanged in the high-gravity field, but the degradation rate of phenol increased. The Ti/IrO -Ta O anode provided good stability because the removal efficiencies of phenol and TOC decreased slightly and the surface morphology of the coating was almost unchanged when it had been used in electrolysis for 11 months, about 1,200 h, in the high-gravity field. Results indicated that the phenol wastewater degradation efficiency was improved, the time was shortened, and the energy consumption was reduced in the high-gravity field.
[Mh] Termos MeSH primário: Eletroquímica/métodos
Óxidos/química
Fenol/química
Tantálio/química
Titânio/química
Águas Residuais
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Catálise
Eletroquímica/instrumentação
Eletrodos
Eletrólise
Irídio/química
Fenóis
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Oxides); 0 (Phenols); 0 (Waste Water); 0 (Water Pollutants, Chemical); 12030-49-8 (iridium oxide); 339NCG44TV (Phenol); 44448S9773 (Iridium); 6424HBN274 (Tantalum); D1JT611TNE (Titanium); OEZ64Z53M4 (tantalum oxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170801
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2017.262


  5 / 1627 MEDLINE  
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[PMID]:28675345
[Au] Autor:Lv X; Song C; He H; Jiang C; Li Y
[Ad] Endereço:1 Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Capital Medical University, People's Republic of China.
[Ti] Título:Transvenous retrograde AVM embolization: Indications, techniques, complications and outcomes.
[So] Source:Interv Neuroradiol;23(5):504-509, 2017 Oct.
[Is] ISSN:2385-2011
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Objective Transvenous retrograde arteriovenous malformation (AVM) embolization (TRAE) has been proposed. The present study was to review the techniques, their conjunctions and effectiveness. Methods Eligible related articles were identified by searching the PubMed and Web of Science databases using "transvenous" and "arteriovenous malformation." Results A total of 16 eligible studies, with 60 cases of AVM treated with TRAE, were analyzed. Prior to TRAE procedure, transarterial Onyx 18 was performed in 23 (38.3%), cyanoacrylate in three (5%) and coiling in two (3.3%), neurosurgery in one (1.7%) and radiosurgery in three (5%). These prior treatments were used to reduce the size of the nidus to <3 cm and TRAE was performed. One anterior choroidal artery aneurysm was coiled before TRAE. Systemic hypotension (blood pressure<100 mmHg) occurred in six (10%) patients and local hypotension (proximal arterial temporary balloon protection) in five (8.3%) patients. Complete obliteration was achieved in 56 (93.3%) AVMs, four (6.7%) with residual, of which one was supplemented with radiosurgery. During mean one-year follow-up (1 month to 3.2 years), there were five cases (8.3%) of permanent disability and one (1.7%) mortality resulting from initial hemorrhage. Fifty-four (90%) patients were independent (mRS ≤ 2) at follow-up. Ruptured AVMs and Spetzler-Martin I-III were associated with a high cure rate. Conclusion According to previous reports, selected AVMs could undergo TRAE. TRAE is safe and curative with Onyx after the nidus size is reduced sufficiently by transarterial embolization, neurosurgery or radiosurgery, with or without the aid of proximal arterial temporary balloon protection.
[Mh] Termos MeSH primário: Embolização Terapêutica/métodos
Malformações Arteriovenosas Intracranianas/terapia
[Mh] Termos MeSH secundário: Cianoacrilatos/uso terapêutico
Combinação de Medicamentos
Embolização Terapêutica/efeitos adversos
Embolização Terapêutica/instrumentação
Seres Humanos
Procedimentos Neurocirúrgicos
Avaliação de Resultados (Cuidados de Saúde)
Polivinil/uso terapêutico
Radiocirurgia
Tantálio/uso terapêutico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cyanoacrylates); 0 (Drug Combinations); 0 (Onyx 18); 0 (Polyvinyls); 6424HBN274 (Tantalum)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171108
[Lr] Data última revisão:
171108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170705
[St] Status:MEDLINE
[do] DOI:10.1177/1591019917716817


  6 / 1627 MEDLINE  
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[PMID]:28652735
[Au] Autor:Kang C; Wei L; Song B; Chen L; Liu J; Deng B; Pan X; Shao L
[Ad] Endereço:Department of Stomatology, Nanfang Hospital, Southern Medical University.
[Ti] Título:Involvement of autophagy in tantalum nanoparticle-induced osteoblast proliferation.
[So] Source:Int J Nanomedicine;12:4323-4333, 2017.
[Is] ISSN:1178-2013
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:Porous tantalum (Ta) implants are highly corrosion resistant and biocompatible, and they possess significantly better initial stability than that of conventional titanium (Ti) implants. During loading wear, Ta nanoparticles (Ta-NPs) that were deposited on the surface of a porous Ta implant are inevitably released and come into direct contact with peri-implant osteoblasts. The wear debris may influence cell behavior and implant stabilization. However, the interaction of Ta-NPs with osteoblasts has not been clearly investigated. This study aimed to investigate the effect of Ta-NPs on cell proliferation and their underlying mechanism. The Cell Counting Kit-8 (CCK-8) assay was used to measure the cell viability of MC3T3-E1 mouse osteoblasts and showed that Ta-NP treatment could increase cell viability. Then, confocal microscopy, Western blotting, and transmission electron microscopy were used to confirm the autophagy induced by Ta-NPs, and evidence of autophagy induction was observed as positive LC3 puncta, high-LC3-II expression, and autophagic vesicle ultrastructures. The CCK-8 assay revealed that the cell viability was further increased and decreased by the application of an autophagy inducer and inhibitor, respectively. In addition, pre-treatment with autophagy inhibitor 3-methyladenine (3-MA) inhibited the Ta-NP-induced autophagy. These results indicate that the Ta-NPs can promote cell proliferation, that an autophagy inducer can further strengthen this effect and that an autophagy inhibitor can weaken this effect. In conclusion, autophagy was involved in Ta-NP-induced cell proliferation and had a promoting effect.
[Mh] Termos MeSH primário: Autofagia/efeitos dos fármacos
Nanopartículas/química
Osteoblastos/efeitos dos fármacos
Tantálio/farmacologia
[Mh] Termos MeSH secundário: Adenina/análogos & derivados
Adenina/farmacologia
Animais
Linhagem Celular
Proliferação Celular/efeitos dos fármacos
Sobrevivência Celular/efeitos dos fármacos
Camundongos
Osteoblastos/citologia
Porosidade
Próteses e Implantes
Tantálio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
5142-23-4 (3-methyladenine); 6424HBN274 (Tantalum); JAC85A2161 (Adenine)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171002
[Lr] Data última revisão:
171002
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE
[do] DOI:10.2147/IJN.S136281


  7 / 1627 MEDLINE  
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[PMID]:28646360
[Au] Autor:Laaksonen I; Lorimer M; Gromov K; Rolfson O; Mäkelä KT; Graves SE; Malchau H; Mohaddes M
[Ad] Endereço:Harris Orthopaedic Laboratory, Massachusetts General Hospital, Boston, MA, USA.
[Ti] Título:Does the Risk of Rerevision Vary Between Porous Tantalum Cups and Other Cementless Designs After Revision Hip Arthroplasty?
[So] Source:Clin Orthop Relat Res;475(12):3015-3022, 2017 Dec.
[Is] ISSN:1528-1132
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Earlier results with porous tantalum acetabular cups in revision THA generally have been favorable. Recently there has been some evidence presented that porous tantalum cups might decrease the risk of rerevision in the setting of revision hip surgery performed owing to prosthetic joint infection (PJI). As the data supporting this assertion come from a study with a limited study population, examining this issue with a large registry approach may be enlightening. QUESTIONS/PURPOSES: By combining results from two large, national registries, we asked: (1) Do porous tantalum cups show improved survival after revision THA compared with other cementless designs? (2) Does the use of porous tantalum cups influence survivorship when rerevision for PJI is the endpoint? METHODS: A total of 2442 first-time THA revisions with porous tantalum cups and 4401 first-time revisions with other uncemented cups were included in this collaborative study between the Australian and Swedish national joint registries. The mean age of the patients was 69 years (range, 19-97 years), 3754 (55%) of the patients were women, and the mean followup for the porous tantalum and uncemented control groups were 3.0 years (SD, ± 2.1 years) and 3.4 years (SD, ± 2.3 years), respectively. Concomitant stem revision was more common in the porous tantalum group (43% versus 36%). The use of porous tantalum augments also was analyzed as a proxy for more complex acetabular reconstructions. In an attempt to further reduce selection bias, we performed subgroup analysis for primary operations attributable to osteoarthritis and first revision attributable to aseptic loosening. RESULTS: Kaplan-Meier survivorship with rerevisison for any reason up to 7 years was comparable between the porous tantalum cup group and the uncemented cup control group (86% [95% CI, 85%-89%] and 87% [95% CI, 85%-89%], respectively; p = 0.85) and the overall survivorship up to 7 years with a second revision for PJI as the endpoint (97% [95% CI, 95%-98%] and 97% [95% CI, 96%-98%], respectively; p = 0.64). Excluding procedures where augments had been used or studying primary osteoarthritis and first revision owing to aseptic loosening subgroups did not change this result. CONCLUSIONS: Implant survival for a porous tantalum cup in first-time THA revision was similar to the survival of the uncemented cup control group. With the numbers available, no benefit in survival with rerevision for infection as the endpoint could be ascribed to the porous tantalum cup group, as has been suggested by earlier work. Further studies with acetabular bone deficiency data, greater insight into host comorbidity factors, and a longer followup are needed to corroborate or refute these results. LEVEL OF EVIDENCE: Level III, therapeutic study.
[Mh] Termos MeSH primário: Artroplastia de Quadril/instrumentação
Articulação do Quadril/cirurgia
Prótese de Quadril
Falha de Prótese
Tantálio/química
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Artroplastia de Quadril/efeitos adversos
Austrália
Feminino
Articulação do Quadril/diagnóstico por imagem
Articulação do Quadril/fisiopatologia
Prótese de Quadril/efeitos adversos
Seres Humanos
Estimativa de Kaplan-Meier
Masculino
Meia-Idade
Porosidade
Modelos de Riscos Proporcionais
Desenho de Prótese
Infecções Relacionadas à Prótese/microbiologia
Infecções Relacionadas à Prótese/cirurgia
Sistema de Registros
Reoperação
Fatores de Risco
Suécia
Fatores de Tempo
Resultado do Tratamento
Adulto Jovem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; MULTICENTER STUDY
[Nm] Nome de substância:
6424HBN274 (Tantalum)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171117
[Lr] Data última revisão:
171117
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170625
[St] Status:MEDLINE
[do] DOI:10.1007/s11999-017-5417-3


  8 / 1627 MEDLINE  
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[PMID]:28592072
[Au] Autor:Du YQ; Zhou YG; Piao S; Wu WM; Ma HY; Gao ZS; Sun JY; Zheng C; Wang S
[Ad] Endereço:Department of Orthopedics Surgery, General Hospital of Chinese People's Liberation Army, Beijing 100853, China.
[Ti] Título:[Effects of trabecular metal augments for the reconstruction of Paprosky type â…¢ acetabulum bone defects].
[So] Source:Zhonghua Wai Ke Za Zhi;55(6):410-415, 2017 Jun 01.
[Is] ISSN:0529-5815
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:To investigate the methods and short-time clinical results of reconstruction of Paprosky type â…¢ acetabulum bone defects by using tantalum augments. A total of 17 patients (17 hips) with Paprosky type â…¢ acetabulum bone defects, treated with tantalum augments in revision of total hip arthroplasty at Department of Orthopedics Surgery in General Hospital of Chinese People's Liberation Army were retrospectively analyzed from March 2014 to May 2016.There were 6 males and 11 females aged from 23 to 74 years with an average of (50.2±16.3) years. Tantalum augments or TM-Cup augment (the cup-on-cup technique) were used to reconstruct the defects.The TM-Cup augment was the tantalum revision cup which was removed titanium ring. The cup-on-cup technique combined TM-Cup augment and biological acetabulum cup. Augments were served as the nonresorptive structural allograft in revision of total hip arthroplasty. Harris hip score was used to evaluate clinical effects. The vertical position of the rotation center was measured and analyzed. Radiographic assessments of the acetabular components were performed by DeLee-Charnley and the Anderson criteria and recorded postoperative complications. All the patients were followed up from 3 to 29 months with an average of (16.2±5.4) months, tantalum augments and biological acetabulum cup were used in 13 patients, the TM-Cup augment and biological acetabulum cup were used in 4 patients. At the time of the latest follow-up, the mean Harris hip score increased compared to preoperatively (86.8±8.3 . 30.0±12.0) ( =12.78, <0.01), the average vertical location of the center of rotation was decreased ((25.3±9.8) mm .(47.6±10.5)) mm ( =4.95, <0.01). All the tantalum augments and biological acetabulum cups were stable, there were no infection, dislocation and other complications. The use of tantalum augments could be considered as an effective management of Paprosky type â…¢ defects providing good clinical and radiographic outcomes in the short term.The cup-on-cup technique which was used in reconstruction of severe superior-invagination acetabular bone defects and restoration relatively normal center of rotation had special application value.
[Mh] Termos MeSH primário: Acetábulo/cirurgia
Artroplastia de Quadril
Prótese de Quadril
[Mh] Termos MeSH secundário: Adulto
Idoso
Feminino
Seres Humanos
Luxações Articulares
Masculino
Metais
Meia-Idade
Complicações Pós-Operatórias
Falha de Prótese
Reoperação
Estudos Retrospectivos
Rotação
Tantálio
Transplante Homólogo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals); 6424HBN274 (Tantalum)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170807
[Lr] Data última revisão:
170807
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170609
[St] Status:MEDLINE
[do] DOI:10.3760/cma.j.issn.0529-5815.2017.06.003


  9 / 1627 MEDLINE  
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[PMID]:28554024
[Au] Autor:Folens K; Du Laing G
[Ad] Endereço:Laboratory of Analytical Chemistry and Applied Ecochemistry, Department of Applied Analytical and Physical Chemistry, Ghent University, Coupure Links 653, 9000 Gent, Belgium. Electronic address: Karel.Folens@UGent.be.
[Ti] Título:Dispersion and solubility of In, Tl, Ta and Nb in the aquatic environment and intertidal sediments of the Scheldt estuary (Flanders, Belgium).
[So] Source:Chemosphere;183:401-409, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Certain specialty elements are indispensable in modern technologies for their particular properties. Yet, potential risks associated to the release of these elements at any stage, remains unknown. Therefore, the dispersion of indium (In), thallium (Tl), tantalum (Ta) and niobium (Nb) in the aquatic environment of the Scheldt estuary (Flanders, Belgium) was studied. Maximum concentrations in intertidal sediments of 101 ± 15 µg kg for In, 481 ± 37 µg kg for Tl, 88 ± 19 µg kg for Ta and 1162 ± 4 µg kg for Nb appeared on the sampling location closest to the river mouth, i.e. 57.5 km upstream. Their distribution in the intertidal sediments depends on the physicochemical sediment characteristics along the flow of the river Scheldt. The same was the case for most other metals and aluminum as their occurrence also correlated (p < 0.05) with the occurrence of In, Tl and Nb. While in general, studied elements correlate to the OM content and sulfur and phosphorus herein included, a relative enrichment of In, Tl and Nb was seen at Rupelmonde (92.0 km from the river mouth). Mainly the intertidal sediment silt fraction is capable of retaining the elements by exchanging with other ions in the mineral interlayer. Increasing salinity towards the river mouth can furthermore induce the formation of insoluble chloride species. Overall, the solubility of In, Tl, Ta and Nb appeared extremely low upon extraction of pore water from intertidal sediments saturated to 100% field capacity.
[Mh] Termos MeSH primário: Estuários
Sedimentos Geológicos/análise
Poluentes Químicos da Água
[Mh] Termos MeSH secundário: Bélgica
Monitoramento Ambiental
Sedimentos Geológicos/química
Índio/análise
Nióbio/análise
Rios/química
Solubilidade
Tantálio/análise
Tálio/análise
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 045A6V3VFX (Indium); 05175J654G (Niobium); 6424HBN274 (Tantalum); AD84R52XLF (Thallium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170929
[Lr] Data última revisão:
170929
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170530
[St] Status:MEDLINE


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[PMID]:28525874
[Au] Autor:Filella M; Rodríguez-Murillo JC
[Ad] Endereço:Institute F.-A. Forel, University of Geneva, Boulevard Carl-Vogt 66, CH-1205 Geneva, Switzerland. Electronic address: montserrat.filella@unige.ch.
[Ti] Título:Less-studied TCE: are their environmental concentrations increasing due to their use in new technologies?
[So] Source:Chemosphere;182:605-616, 2017 Sep.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The possible environmental impact of the recent increase in use of a group of technology-critical elements (Nb, Ta, Ga, In, Ge and Te) is analysed by reviewing published concentration profiles in environmental archives (ice cores, ombrotrophic peat bogs, freshwater sediments and moss surveys) and evaluating temporal trends in surface waters. No increase has so far been recorded. The low potential direct emissions of these elements, resulting from their absolute low production levels, make it unlikely that the increasing use of these elements in modern technology has any noticeable effect on their environmental concentrations on a global scale. This holds particularly true for those of these elements that are probably emitted in relatively high amounts from other human activities (i.e., coal combustion and non-ferrous smelting), such as In, the most studied element of the group.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Poluentes Ambientais/análise
Desenvolvimento Industrial/tendências
Metais Pesados/análise
[Mh] Termos MeSH secundário: Gálio
Germânio
Seres Humanos
Índio
Nióbio
Tantálio
Tecnécio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Metals, Heavy); 00072J7XWS (Germanium); 045A6V3VFX (Indium); 05175J654G (Niobium); 6424HBN274 (Tantalum); 7440-26-8 (Technetium); CH46OC8YV4 (Gallium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170520
[St] Status:MEDLINE



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