A. Costa e Silva

A. Costa e Silva

Universidade Federal Fluminense

H-index: 18

Latin America-Brazil

About A. Costa e Silva

A. Costa e Silva, With an exceptional h-index of 18 and a recent h-index of 11 (since 2020), a distinguished researcher at Universidade Federal Fluminense, specializes in the field of metallurgy, steelmaking, steel, materials.

His recent articles reflect a diverse array of research interests and contributions to the field:

DERMATITE DE CONTACTO POR DIFENCIPRONA EM ENFERMEIRO: RELATO DE CASO

CARACTERIZAÇÃO DAS DOENÇAS PROFISSIONAIS NOTIFICADAS NUM HOSPITAL TERCIÁRIO PORTUGUÊS ENTRE 2011 E 2022

Isolation of Biologically Active Extracellular Vesicles-Associated AAVs for Gene Delivery to the Brain by Size Exclusion Chromatography

Development of a computational thermodynamics EERZ model for the improvement of hot rolled light steel profiles steel refining

CALPHAD Description of the Super-cooled Liquid from the Mo-Nb-B System with the 2-State Model

Thermally sprayed multi-principal element Cr40Co40Ni20 coatings–Oxidation upon coatings' build-up and electrochemical corrosion

Síndrome Doloroso do Grande Trocânter em Trabalhadora da Indústria Têxtil-Caso Clínico

Seleção in vitro de bactérias probióticas do peixe ornamental Amazônico Nannostomus beckfordi

A. Costa e Silva Information

University

Universidade Federal Fluminense

Position

Professor EEIMVR-

Citations(all)

2692

Citations(since 2020)

1125

Cited By

2291

hIndex(all)

18

hIndex(since 2020)

11

i10Index(all)

37

i10Index(since 2020)

14

Email

University Profile Page

Universidade Federal Fluminense

A. Costa e Silva Skills & Research Interests

metallurgy

steelmaking

steel

materials

Top articles of A. Costa e Silva

DERMATITE DE CONTACTO POR DIFENCIPRONA EM ENFERMEIRO: RELATO DE CASO

Authors

G Miranda,A Pereira,A Ribeiro,P Silva,A Silva,L Cruz,J Soares

Journal

Revista Portuguesa de Saúde Ocupacional online

Published Date

2024/6

A dermatite de contacto é a causa mais frequente de doença cutânea ocupacional, representando mais de 90% da totalidade destas patologias. Esta resulta da exposição cutânea a uma substância, irritante ou alergénica, que induz uma reação inflamatória. Subdivide-se em dermatite de contacto alérgica (DCA) e em irritativa (DCI)(1)(2). A primeira resulta de uma reação imunológica de hipersensibilidade do tipo IV, após a exposição repetida a um alergénio, tipicamente manifestando-se um a três dias após a exposição. Após a sensibilização, a reação inflamatória pode surgir com exposição a quantidades muito reduzidas ao alergénio em causa. Já a DCI é causada pela agressão direta da pele por uma substância nociva quando aplicada por tempo e concentrações suficientes. Qualquer indivíduo pode desenvolver esta patologia, desde que exposto a uma quantidade mínima necessária de agente irritante durante um determinado período de tempo, tornando-se assim a dermatite de contacto ocupacional (DCO) mais comum e a mais prevalente em indivíduos sem atopia (2).Para confirmação de DCA é necessário a realização de testes epicutâneos (TE) com objetivação do alergénio responsável. Nos TE a primeira leitura é efetuada 48 horas após a sua aplicação, estando recomendado que a segunda leitura seja efetuada às 72 horas e/ou 96 horas desde a sua aplicação. Cerca de 30% das leituras negativas às 48 horas tornam-se positivas às 96 horas, pelo que grande parte dos autores refere que esta é a altura ideal para a segunda leitura. Este aspeto revela-se ainda importante porque auxilia a determinar se a reação é irritativa …

CARACTERIZAÇÃO DAS DOENÇAS PROFISSIONAIS NOTIFICADAS NUM HOSPITAL TERCIÁRIO PORTUGUÊS ENTRE 2011 E 2022

Authors

A Pereira,A Ribeiro,G Miranda,P Silva,A Silva,J Soares,L Cruz

Published Date

2023/12

Introdução: O setor da Saúde representa um grande desafio em Saúde Ocupacional, nomeadamente na prevenção e gestão das doenças profissionais. As patologias infeciosa, dermatológica, respiratória e musculosquelética representam a grande maioria das doenças profissionais na área da Saúde, sendo este último grupo o que se tem apresentado como mais prevalente em contexto hospitalar. Para além de consequências para a saúde dos trabalhadores, as doenças profissionais apresentam também elevados custos para as empresas e sociedade em geral. Objetivos: Análise das doenças profissionais participadas num Serviço de Saúde Ocupacional de um hospital terciário português. Métodos: Estudo observacional retrospetivo entre janeiro de 2011 e dezembro de 2022. Os dados foram obtidos do software do Serviço de Saúde Ocupacional. Resultados: Verificou-se a participação de 203 doenças profissionais, entre 2011 e 2022, sendo que a idade média foi de 47, 1 anos. O ano 2020, foi o que obteve o maior número de notificações, num total de 71, assim como de confirmações das mesmas. 83, 7% das suspeitas foram em indivíduos do sexo feminino, sendo igualmente mais prevalentes nestas (5, 9%). Destes, 62, 6% correspondem a trabalhadores com horário por turnos. Os assistentes operacionais contabilizam o maior número absoluto (36, 9%), no entanto são os técnicos superiores de diagnostico de terapêutica que apresentam maior prevalência de participações (9, 9%). As doenças mais participadas e certificadas foram as infeciosas, seguidas das musculosqueléticas, sendo estas as que mais geraram incapacidade (9 …

Isolation of Biologically Active Extracellular Vesicles-Associated AAVs for Gene Delivery to the Brain by Size Exclusion Chromatography

Authors

Luis Pereira de Almeida,Carina Henriques,Miguel Lopes,Patrícia Albuquerque,David Rufino Ramos,Laetitia Gaspar,Diana Lobo,Kevin Leandro,Ana Silva,Rafael Baganha,Sónia Duarte,Casey Maguire,Magda Santana,Rui Nobre

Published Date

2023/9/6

Extracellular vesicles-associated adeno-associated viral vectors (EV-AAVs) emerged as a new opportunity for non-invasive gene therapy targeting the central nervous system (CNS). However, in previous reports, only AAV serotypes with known ability to cross the blood-brain barrier (BBB) have been used for EV-AAV production and testing through non-invasive strategies. In this work, we aimed at optimizing a size exclusion chromatography (SEC) protocol for the production and isolation of natural and biologically active brain-targeting EV-AAVs, that could be applied to any AAV serotype and further used for non-invasive gene delivery to the CNS. We performed a comparison between SEC and differential ultracentrifugation (UC) isolation protocols in terms of yield, contaminants, and transgene expression efficiency. We found that SEC allows a higher recovery of EV-AAVs, free of cell contaminating proteins and with less solo AAVs than UC. Remarkably, SEC-purified EV-AAVs also showed to be more potent at transgene expression than solo AAVs in neuronal cell lines. Brain-targeting EV-AAVs exhibited the ability to reach be brain upon intravenous administration. In conclusion, SEC-purified brain-targeting EV-AAVs show to be a promising gene delivery vector for therapy of brain disorders.

Development of a computational thermodynamics EERZ model for the improvement of hot rolled light steel profiles steel refining

Authors

Livia Lopes de Oliveira Goulart,José Adilson de Castro,André Costa e Silva

Journal

Calphad

Published Date

2023/6/1

Light steel profiles are steels with medium C, Mn and Si contents. In these steels internal cleanness is important for mechanical properties and surface quality, both during hot rolling and during the coating of the final product. Production costs of these steels are defined by the total heat time, from charging the Electric Arc Furnace (EAF) to starting continuous casting. Ladle furnace (LF) processing has a large influence on heat time and costs related to deoxidation, meeting composition requirements with a high yield of oxidizing alloying additions and proper rinsing to promote homogenization and cleanness. Thermodynamics and kinetics control how slag and steel oxidation levels evolve, as well as the evolution of the non-metallic inclusion population since at this stage primary oxides are the main inclusions. A model based on solid thermodynamic and kinetics fundamentals would be extremely useful for the …

CALPHAD Description of the Super-cooled Liquid from the Mo-Nb-B System with the 2-State Model

Authors

THIAGO TAKAMURA YANAGUISSAVA,André Costa e Silva,Walter José Botta

Published Date

2023/5/18

In the present work, we assessed with the CALPHAD method via Thermo-Calc the super-cooled liquid (SCL) that leads to the formation of metallic vitreous materials. This research aimed to improve the database for thermodynamic calculations of SCLs in the computational study of materials, specifically some subsystems of the Fe-Mo-Cr-Nb-B system, since its application as a metallic glass coating combines exceptionally hardness, corrosion resistance and wear resistance. Thus, continuing the work of our group that assessed the Fe-Nb-B system with the same methods and models, we described the liquid Mo with the two-state phenomenological model as well as the binary liquids Mo-Nb and Mo-B.

Thermally sprayed multi-principal element Cr40Co40Ni20 coatings–Oxidation upon coatings' build-up and electrochemical corrosion

Authors

GY Koga,ARC Nascimento,FB Ettouil,LCM Rodrigues,G Zepon,C Bolfarini,CS Kiminami,WJ Botta,R Schulz,A Costa e Silva,C Moreau,FG Coury

Journal

Surface and Coatings Technology

Published Date

2023/2/15

Thermally sprayed Cr40Co40Ni20 coatings were produced by high-velocity oxygen fuel (HVOF) and high-velocity air fuel (HVAF). The phases formed upon coatings' build-up were sensitive to oxidation at high temperatures, leading to the formation of various oxygen-rich compounds such as chromia and spinel. Chromia tended to be formed at the inner layer, in contact with the metal, and the spinel forming the outer layer. HVAF coatings suffered much less oxidation compared to the HVOF coatings. The pronounced Cr-depletion at the metallic and oxygen compounds caused by formation of spinel and oxide upon deposition of coatings created regions susceptible to readily corrode in chloride-rich electrolyte.

Síndrome Doloroso do Grande Trocânter em Trabalhadora da Indústria Têxtil-Caso Clínico

Authors

A Pereira,A Ribeiro,G Miranda,P Silva,A Silva,J Soares,L Cruz

Journal

Revista Portuguesa de Saúde Ocupacional online

Published Date

2023/12

As lesões musculoesqueléticas relacionadas com o trabalho (LMERTs) representam uma grande parte da área de atuação da Saúde Ocupacional, representando cerca de 62% das doenças profissionais (DP) certificadas em Portugal, segundo os últimos dados disponíveis (1). Este tipo de lesão afeta os trabalhadores e, consequentemente as empresas e a economia em geral. Estas apresentam consequências como o absentismo, o presentismo e a reforma antecipada ou compulsiva (2). Em 2015, mais de metade (53%) dos trabalhadores com lesões musculoesqueléticas (LME) indicaram ter estado ausentes do trabalho durante o ano anterior. Dados desse mesmo ano, mostram-nos que um terço dos trabalhadores com LME equacionam que não conseguirão continuar a fazer o seu trabalho até terem 60 anos (2).O síndrome doloroso do grande trocânter, que afeta uma grande variedade de trabalhadores, inclui não só a bursite trocantérica, como também a tendinopatia glútea, sendo esta a tendinopatia do membro inferior mais prevalente. Esta afeta mais as mulheres (quociente 4: 1) e é mais frequente entre os 40 e os 60 anos de idade. Alguns autores reportam prevalências de até 23, 5% no género feminino e 8, 5% no masculino, entre os 50 e 79 anos (3)(4).

Seleção in vitro de bactérias probióticas do peixe ornamental Amazônico Nannostomus beckfordi

Authors

EM Lopes,AV Silva,FAL Barros,AFL Santos,CAM Cordeiro,MVS Couto,PEG Paixão,RY Fujimoto,NC Sousa

Journal

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

Published Date

2022/4/22

This study aimed to isolate and select in vitro bacteria with probiotic potential for the Amazon ornamental fish Nannostomus beckfordi. For isolate, twelve fish underwent surgery procedure to remove their intestinal tract, macerate and then inoculate in the plate petri containing de Man Rugosa Sharped Agar (MRS). After bacterial growth (48 hours at 35ºC), selected strains were inoculated in MRS broth and submitted to resistance test with NaCl (0.5, 1.0, 1.5, 2.0, 2.5 and 3.0%), pH (4, 5, 6, 8 and 9) and bile salts (5% w/v). Inhibition test against pathogenic bacteria Aeromonas hydrophila, Pseudomonas aeroginosa, Streptococcus agalactiae and Aeromonas Jandaei was also performed. Within the isolated strains group (23 strains), only six (S1, S2, S3, S4, S5 and S6) showed probiotic potential. Strains S1 and S6 showed the greater resistance for NaCl (0.5% and 1%) and pH (5 and 6), but only S1 obtained better results to resist the bile salts. Even against pathogenic bacteria, the S1 showed the best results with inhibition halos greater than 9 mm. In the end, this bacterial strain (S1) was identified as Enterococcus faecium 11037CHB. Thus, this is the first report regarding isolated autochthonous bacterium E. faecium with probiotic potential of N. beckfordi.

In vitro bacterial probiotic selection from Nannostomus beckfordi, an Amazon ornamental fish

Authors

EM Lopes,AV Silva,FAL Barros,AFL Santos,CAM Cordeiro,MVS Couto,PEG Paixão,RY Fujimoto,NC Sousa

Journal

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

Published Date

2022/4/22

This study aimed to isolate and select in vitro bacteria with probiotic potential for the Amazon ornamental fish Nannostomus beckfordi. For isolate, twelve fish underwent surgery procedure to remove their intestinal tract, macerate and then inoculate in the plate petri containing de Man Rugosa Sharped Agar (MRS). After bacterial growth (48 hours at 35ºC), selected strains were inoculated in MRS broth and submitted to resistance test with NaCl (0.5, 1.0, 1.5, 2.0, 2.5 and 3.0%), pH (4, 5, 6, 8 and 9) and bile salts (5% w/v). Inhibition test against pathogenic bacteria Aeromonas hydrophila, Pseudomonas aeroginosa, Streptococcus agalactiae and Aeromonas Jandaei was also performed. Within the isolated strains group (23 strains), only six (S1, S2, S3, S4, S5 and S6) showed probiotic potential. Strains S1 and S6 showed the greater resistance for NaCl (0.5% and 1%) and pH (5 and 6), but only S1 obtained better results to resist the bile salts. Even against pathogenic bacteria, the S1 showed the best results with inhibition halos greater than 9 mm. In the end, this bacterial strain (S1) was identified as Enterococcus faecium 11037CHB. Thus, this is the first report regarding isolated autochthonous bacterium E. faecium with probiotic potential of N. beckfordi.

Assessment of thermodynamic functions in the MgO–Al2O3–SiO2 system

Authors

O Fabrichnaya,A Costa e Silva,F Aldinger

Journal

International Journal of Materials Research

Published Date

2022/2/8

The Kapoor-Frohberg cell model and two-sublattice ionic liquid model were used to describe liquid phase in the system MgO–Al2O3–SiO2. Solid solution phases were described by the compound energy formalism. Two data sets have been created based on the same description of solid phases and different models of liquid. It is shown that both models of liquid reproduce experimental data in binary systems very well. Thermodynamic parameters of ternary compounds cordierite and sapphirine were assessed from subsolidus reactions. The liquidus surface for the MgO–Al2O3–SiO2 system is calculated for both models of liquid. The comparison of calculated phase diagrams with experimental data shows that the Kapoor-Frohberg cell model reproduces experimental data better than the ionic sublattice model.

Thermodynamic modelling of oxide and oxynitride phases

Authors

Sergey A Degterov,Archur D Pelton,H-J Seifert,Olga Fabrichnaya,Jnan P Hajra,Alexandra Navrotsky,Katheryn Helean,Varghese Swamy,AV da Costa e Silva,Philip Spencer

Journal

International Journal of Materials Research

Published Date

2022/1/8

A summary of the discussions of the group concerned with the modelling of oxide and oxynitride phases during the “Workshop on Thermodynamic Modelling and Applications” held at Schloss Ringberg, November 14 –20, 1999, is presented. The group focussed its efforts on thermodynamic modelling with a view to creating databases for practical applications. Particular attention was paid to techniques of estimation of entropies, to the proper choice of model parameters and their sequence of optimization in the compound energy formalism (CEF), to the description of magnetic and volumetric properties of solutions within the CEF, to the treatment of short-range ordering and long-range ordering, and to the distribution of ions on different crystallographic sites (i.e. different sublattices) in oxides and silicates.

The Application of Thermodynamics to the In-situ Processing of Aluminum-modified MoSi2 Composites

Authors

André Costa e Silva,Michael J Kaufman

Journal

International Journal of Materials Research

Published Date

2021/12/7

Compositions relevant to the processing of aluminum-modified MoSi2 composites were investigated by electron microscopy and wavelength dispersive spectroscopy (WDS) after equilibrating at 1000 and 1400 °C. The results of these experiments together with literature data were used to determine a set of analytical descriptions of the Gibbs energy of the stable phases in the Al–Mo–Si system relevant to the processing of MoSi2 composites. These results were then used to explain the thermodynamic aspects of three schemes of in-situ processing of MoSi2 composites: (a) silica elimination through aluminum additions, (b) the generation of reinforcements using silica precursors and (c) the formation of coatings on niobium reinforcements. The importance of the application of thermodynamics to the analysis of in-situ reactions is highlighted.

Hybrid organic semiconductors from P3HT and cellulose nanocrystals modified with 3-thiopheneacetic acid

Authors

ACD Silva,F Moura Filho,MRA Alves,AJ de Menezes,MC Silva

Published Date

2021/8/1

Nanocrystals cellulose (CNC) has been used in studies as biotemplate to improve the electronic properties of conjugated polymers (CP) increasing their molecular orientation. This study demonstrates the in situ grafting of the CNC surface esterified with 3-thiophenetic acid (3TAA) during the oxidative polymerization of 3-hexylthiophene. The surface modification of the CNC was evidenced by the presence of the band with an absorption peak at 1737 cm−1 in the infrared region and the chemical displacement at 157 ppm of the 13C NMR, assigned to ester group carbon. The influence of cellulose nanocrystals in the molecular organization of the CP was studied by Ultraviolet-visible Spectroscopy (UV–vis) and Cyclic Voltammetry (CV). The lower band gap energy and anodic peak potential observed for the nanocomposite elaborated with 10 wt% CNC3TAA suggest the influence of nanocrystals on the increase in …

On the Use of the Concept of Match Quality of Settlements to Correlate Static and Dynamic Load Test in Franki piles

Authors

Daniel Kina Murakami,Fabian Corgnier,André Silva,Dirney Cury Filho

Journal

XX Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica, Campinas

Published Date

2020

This paper displays the usage of the concept of Match Quality of Settlement to correlate static and dynamic load tests in Franki piles. The High Strain Dynamic Pile Test (HSDPT) was operated according to the Dynamic Increasing Energy Test (DIET) proposed by Aoki (1989, 1997). The signal-matching analysis was implemented according to the new procedure through which the CAPWAP analysis may be performed in the DIET (Murakami, 2015). The initial studies observed that this procedure had shown positive correlations for precast concrete piles (Murakami, 2015). Murakami (2018) proposes using the littlest achievable shaft quake to access the best traditional match quality calculated on the Wave Up Curve. In this case, the HSDPT matches the Static Load Test’s slope of the pile-top load versus the settlement curve at early loads. The dynamic test was carried out before the static test, and the CAPWAP analysis was done independently of the outcome of the static test. After the static test had performed, its results were compared with the dynamic test. The tests exhibited positive arrangement established on the graphical solution of the match quality of settlements (Murakami, 2018).

Adaptive middleware in go-a software architecture-based approach

Authors

Nelson Rosa,David Cavalcanti,Gláucia Campos,André Silva

Journal

Journal of Internet Services and Applications

Published Date

2020/12

Adaptive middleware is essential for developing distributed systems in several applications domains. The design and implementation of this kind of middleware, however, it is still a challenge due to general adaptation issues, such as When to adapt? Where to include the adaptation code? What to adapt?, and How to guarantee safe adaptations?. Current solutions commonly face these challenges at the implementation level and do not focus on the safety aspects of the adaptation. This paper proposes a holistic solution implemented in Go programming language for developing adaptive middleware centred on the adoption of software architecture principles combined with lightweight use of formalisms. Software architecture concepts work as an enabling approach for structuring and adapting the middleware. Meanwhile, the formalisation helps in providing some guarantees before and during the middleware …

Using computational thermodynamics to understand the evolution of solidification segregation during steel processing

Authors

A Costa e Silva

Journal

Journal of Phase Equilibria and Diffusion

Published Date

2020/8

Steelmaking processes have reached a level of composition control in which variations of composition lower than 0.01% mass are easily achieved for most alloying elements in liquid ladles as large as 350 t. However, solidification processing in industrial conditions introduces inevitable segregation of solutes resulting in product heterogeneity. To mitigate this problem, alloy composition and steel processing steps are carefully evaluated and designed. The understanding of phase equilibria and diffusion processes is essential to understanding solidification segregation, in special in the micro segregation range. Computational thermodynamics (the CALPHAD approach) is very useful for that purpose. Macrosegregation is, furthermore, influenced by fluid flow during solidification. While external causes of fluid flow must be understood and controlled using other analytical tools, the current information about density …

A Comparison between the Measured Load through a Load Cell and a Manometer on the Static Load Test in Piles

Authors

Daniel Kina Murakami,Fabian Corgnier,André Silva,Gabriel Bozan

Journal

XX Congresso Brasileiro de Mecânica dos Solos e Engenharia Geotécnica, Campinas, SP, Brasil (paper approved)

Published Date

2020

The static load test (SLT) in piles may provide the axial force applied at the top of the pile and its corresponding displacement. According to the ABNT NBR 12131, the measured load may be done through a calibrated manometer or a load cell installed in series with the hydraulic jack. However, according to the ASTM D1143, if the maximum test load will exceed 900 kN, place a properly constructed load cell or equivalent device in series with each hydraulic jack. The same load test can be represented by three different load vs. displacement curves (Load cell, manometer, theoretical SLT). The analysis of the results will be different depending on the corresponding curve that is used on the analysis, for example, the use of extrapolation methods to predict the ultimate load. The results revealed that static load tests performed in different project sites might present different over predicted manometer error rates when the hydraulic jack is loading and different under predicted manometer error rates when the hydraulic jack is unloading. The manometer error depends on numerous factors: eccentric and inclined load, the inclination of the reaction beams and the pile cap, manometer accuracy, possible influence of the residual force at the pile toe.

Challenges and opportunities in thermodynamic and kinetic modeling microalloyed HSLA steels using computational thermodynamics

Authors

A Costa e Silva

Journal

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY

Published Date

2020/3/1

Most High Strength Low-Alloy (HSLA) steels rely on the control of the carbonitrides of Ti, Nb and V to achieve their properties. To properly control the distribution and size of precipitates the knowledge of the thermodynamics of the Fe-C-N-(Ti,Nb,V) systems is essential. Furthermore, understanding the kinetics of dissolution and precipitation of the carbonitrides is fundamental to properly design these steels and their processing. In this work, we emphasize Ti and Nb behavior in HSLA steels. First, the thermodynamic information concerning the stability of their carbonitrides in steel is reviewed, highlighting the difficulties associated with the variable C/N ratio of the carbonitrides and with the fact that there is also miscibility between Ti, Nb and V in the carbonitrides of the "NaCl" structure. These difficulties make the use of the compound energy formalism (CEF) and of computational thermodynamics extremely …

An assessment of Fe-Nb-B melts using the two-state liquid model

Authors

ED Alvares,WJ Botta,John Ågren,A Costa e Silva

Journal

Calphad

Published Date

2020/3/1

Amorphous alloys of the (Fe-Co-Ni)-(Cr-Mo-Nb)-B system are promising materials to supply the demands for higher wear resistance components in the petrochemical industry. Since the development of the CALPHAD method, the development of new metallic alloys has been accompanied by thermodynamic modelling and calculations. The prediction of the formation of amorphous alloys requires special care with the modeling of the liquid and or an amorphous phase. As a initial stage in the more complex system, the basic Fe-Nb-B ternary system was selected. In order to predict the stability and tendencies of transformations of these amorphous alloys, the Fe-Nb-B system was reassessed using Ågren's two-state model to describe the liquid phase. The results of the present assessment show very good agreement with the recently reported stable phase diagram. Furthermore, the use of the two-state model for the …

Does ultraconservative access affect the efficacy of root canal treatment and the fracture resistance of two‐rooted maxillary premolars?

Authors

AA Silva,FG Belladonna,G Rover,RT Lopes,EJL Moreira,G De‐Deus,EJNL Silva

Journal

International Endodontic Journal

Published Date

2020/2

Aim To evaluate the influence of ultraconservative endodontic cavities (UEC) on canal shaping and filling ability, cleaning of the pulp chamber, time required to perform root canal treatment and fracture resistance of 2‐rooted maxillary premolars in comparison with traditional endodontic access cavities (TEC) in extracted teeth placed in a phantom head to simulate clinical conditions. Methodology Twenty extracted intact 2‐rooted maxillary premolars were scanned in a micro‐computed tomographic device, matched based on similar anatomical features of the canals and assigned to UEC or TEC groups (n = 10). Then, teeth were mounted on a mannequin head and their pulp chamber accessed. After canal preparation, filling and cavity restoration, the time required to perform root canal treatment was recorded and the specimens were loaded to fracture in a universal testing machine. The maximum load at fracture …

See List of Professors in A. Costa e Silva University(Universidade Federal Fluminense)

A. Costa e Silva FAQs

What is A. Costa e Silva's h-index at Universidade Federal Fluminense?

The h-index of A. Costa e Silva has been 11 since 2020 and 18 in total.

What are A. Costa e Silva's top articles?

The articles with the titles of

DERMATITE DE CONTACTO POR DIFENCIPRONA EM ENFERMEIRO: RELATO DE CASO

CARACTERIZAÇÃO DAS DOENÇAS PROFISSIONAIS NOTIFICADAS NUM HOSPITAL TERCIÁRIO PORTUGUÊS ENTRE 2011 E 2022

Isolation of Biologically Active Extracellular Vesicles-Associated AAVs for Gene Delivery to the Brain by Size Exclusion Chromatography

Development of a computational thermodynamics EERZ model for the improvement of hot rolled light steel profiles steel refining

CALPHAD Description of the Super-cooled Liquid from the Mo-Nb-B System with the 2-State Model

Thermally sprayed multi-principal element Cr40Co40Ni20 coatings–Oxidation upon coatings' build-up and electrochemical corrosion

Síndrome Doloroso do Grande Trocânter em Trabalhadora da Indústria Têxtil-Caso Clínico

Seleção in vitro de bactérias probióticas do peixe ornamental Amazônico Nannostomus beckfordi

...

are the top articles of A. Costa e Silva at Universidade Federal Fluminense.

What are A. Costa e Silva's research interests?

The research interests of A. Costa e Silva are: metallurgy, steelmaking, steel, materials

What is A. Costa e Silva's total number of citations?

A. Costa e Silva has 2,692 citations in total.

What are the co-authors of A. Costa e Silva?

The co-authors of A. Costa e Silva are Zi-Kui Liu, Dorothy Pate Enright Professor, Byeong-Joo Lee, John Ågren, Marcos Flavio De Campos, Paulo Roberto Mei, Tomás Gómez-Acebo Temes.

    Co-Authors

    H-index: 90
    Zi-Kui Liu, Dorothy Pate Enright Professor

    Zi-Kui Liu, Dorothy Pate Enright Professor

    Penn State University

    H-index: 66
    Byeong-Joo Lee

    Byeong-Joo Lee

    Pohang University of Science and Technology

    H-index: 62
    John Ågren

    John Ågren

    Kungliga Tekniska högskolan

    H-index: 28
    Marcos Flavio De Campos

    Marcos Flavio De Campos

    Universidade Federal Fluminense

    H-index: 27
    Paulo Roberto Mei

    Paulo Roberto Mei

    Universidade Estadual de Campinas

    H-index: 18
    Tomás Gómez-Acebo Temes

    Tomás Gómez-Acebo Temes

    Universidad de Navarra

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