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Journal articles on the topic "Titanium plates"

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VLASKIN, M. S., A. V. GRIGORENKO, E. I. SHKOLNIKOV, and A. S. ILYUKHIN. "GOLD-PLATED TITANIUM VS CARBON-IMPLANTED TITANIUM AS MATERIAL FOR BIPOLAR PLATES IN PEM FUEL CELLS." Surface Review and Letters 26, no. 08 (September 5, 2019): 1950038. http://dx.doi.org/10.1142/s0218625x19500380.

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Three different types of current-collecting plates for air-hydrogen PEM fuel cell were manufactured and tested: unmodified titanium plates; gold-plated titanium plates and titanium plates treated by carbon ions implantation. It was shown that the applied surface modifications reduce contact resistance between titanium plate and carbon gas diffusion layer. Total ohmic resistance of fuel cell is reduced by 1.8 and 1.4 times in case of gold-plated titanium and carbon-implanted titanium, respectively, in comparison with uncoated titanium. Although gold plating turned out to be more profitable than carbon ion implantation in terms of electrical characteristics, in the last case, the performance enhancement was reached without using precious metals, which at mass production must play more important role. This technology promises to reduce the cost of bipolar plates manufacturing, while maintaining high electrical performance of PEM fuel cells.
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Bakhman, N. N., G. P. Kuznetsov, and V. M. Puchkov. "Combustion of titanium plates." Combustion, Explosion, and Shock Waves 36, no. 4 (July 2000): 470–75. http://dx.doi.org/10.1007/bf02699477.

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Hung, L.-W., C.-K. Chao, J.-R. Huang, and J. Lin. "Screw head plugs increase the fatigue strength of stainless steel, but not of titanium, locking plates." Bone & Joint Research 7, no. 12 (December 2018): 629–35. http://dx.doi.org/10.1302/2046-3758.712.bjr-2018-0083.r1.

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ObjectivesScrew plugs have been reported to increase the fatigue strength of stainless steel locking plates. The objective of this study was to examine and compare this effect between stainless steel and titanium locking plates.MethodsCustom-designed locking plates with identical structures were fabricated from stainless steel and a titanium alloy. Three types of plates were compared: type I unplugged plates; type II plugged plates with a 4 Nm torque; and type III plugged plates with a 12 Nm torque. The stiffness, yield strength, and fatigue strength of the plates were investigated through a four-point bending test. Failure analyses were performed subsequently.ResultsFor stainless steel, type II and type III plates had significantly higher fatigue strength than type I plates. For titanium, there were no significant differences between the fatigue strengths of the three types of plates. Failure analyses showed local plastic deformations at the threads of screw plugs in type II and type III stainless steel plates but not in titanium plates.ConclusionThe screw plugs could increase the fatigue strength of stainless steel plates but not of titanium plates. Therefore, leaving screw holes open around fracture sites is recommended in titanium plates. Cite this article: L-W. Hung, C-K. Chao, J-R. Huang, J. Lin. Screw head plugs increase the fatigue strength of stainless steel, but not of titanium, locking plates. Bone Joint Res 2018;7:629–635. DOI: 10.1302/2046-3758.712.BJR-2018-0083.R1.
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Shang, Guo Qiang, Li Ping Li, and Xin Nan Wang. "Experimental Study on Welding Process of TC4 Titanium Alloy with Different Welding Wires." Materials Science Forum 1035 (June 22, 2021): 57–62. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.57.

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In present study, the effects of different welding wires on the evolution of microstructure and mechanical properties of TC4 titanium alloy test plates were studied. The results show that the test plates welded by TA20 titanium alloy wire, TC3 titanium alloy wire and TC4 titanium alloy wire are well formed, no defects are found in the cross section of the weld. The microstructures of these test plates are similar, and needle-like martensite exists in the weld area. In comparison, this is little obvious difference in tensile strength among these test plates welded by different welding wires, while the plates welded by TC4 titanium alloy has better elongation, contraction of aera, impact toughness and better balance of strength and toughness.
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Yang, Xiu Dong, Li Zhao Teng, Jian Lu, Qing Rong Wei, Hui Wang, Ji Yong Chen, and Bang Cheng Yang. "Biomimetic Coating on Titanium Metal and Its Excellent Cell Proliferation." Key Engineering Materials 330-332 (February 2007): 613–16. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.613.

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Biomimetic coating on roughed titanium plates were prepared in this work by a cathode deposition method in calcium phosphate solution electrolyte. The coatings of plate-like apatite crystals were deposited on the titanium plates under a constant potential of 2.0V for 60 min at 37. The coating crystals were identified to be carbonate-containing apatite (bone-like apatite) by X-ray diffraction and scanning electronic microscopy. The cell proliferation and adhesion of L929 cells on the titanium metal plates with biomimetic coating and the titanium plates with roughed-only were tested. The results showed that biomimetic coating on titanium surface can enhance the materials bioactivity. The study indicated that cathode method is potential to prepare biomimetic coating on titanium implants with excellent bioactivity.
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Hudecki, Andrzej, Dorota Łyko-Morawska, Wirginia Likus, Magdalena Skonieczna, Jarosław Markowski, Renata Wilk, Aleksandra Kolano-Burian, Wojciech Maziarz, Jolanta Adamska, and Marek J. Łos. "Composite Nanofibers Containing Multiwall Carbon Nanotubes as Biodegradable Membranes in Reconstructive Medicine." Nanomaterials 9, no. 1 (January 4, 2019): 63. http://dx.doi.org/10.3390/nano9010063.

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We have tested titanium (Ti) plates that are used for bone reconstruction in maxillofacial surgery, in combination with five types of novel long-resorbable biomaterials: (i) PCL0—polycaprolactone without additives, (ii) PCLMWCNT—polycaprolactone with the addition of multiwall carbon nanotubes (MWCNT), (iii) PCLOH—polycaprolactone doped with multiwall carbon nanotubes (MWCNT) containing –OH hydroxyl groups, (iv) PCLCOOH—polycaprolactone with the addition of multiwall carbon nanotubes (MWCNT) containing carboxyl groups, and (v) PCLTI—polycaprolactone with the addition of Ti nanoparticles. The structure and properties of the obtained materials have been examined with the use of Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and/or X-ray powder diffraction (XRD). Titanium BR plates have been covered with: (i) PCL0 fibers (PCL0BR—connection plates), (ii) PCLMWCNT fibers (PCLMWCNTBR—plates), (iii) PCLOH fibers (PCLOHBR—plates), (iv) PCLCOOH (PCLCOOHBR—plates), (v) PCLTI fiber (PCLTIBR—connection plates). Such modified titanium plates were exposed to X-ray doses corresponding to those applied in head and neck tumor treatment. The potential leaching of toxic materials upon the irradiation of such modified titanium plates, and their effect on normal human dermal fibroblasts (NHDF) have been assessed by MTT assay. The presented results show variable biological responses depending on the modifications to titanium plates.
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Niedzielska, Iwona, Natalia Sitek-Ignac, Michał Bąk, and Damian Niedzielski. "Is Allergy to Titanium Bone Fixation Plates a Problem?" Coatings 12, no. 2 (February 7, 2022): 214. http://dx.doi.org/10.3390/coatings12020214.

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Open reduction and internal fixation (ORIF) with titanium fixation plates is the gold standard for maxillofacial fracture treatment. Titanium is considered a fully compatible material. However, reports of allergic reactions to titanium implants do occur. The aim of this work is to answer the question whether titanium devices used in the treatment of fractures in the craniofacial region can cause allergic reactions. The study comprised 50 subjects treated surgically for maxillofacial injuries with the use of titanium composite devices. Allergic tests were performed by the patch method. The control group consisted of 20 healthy people who did not have any titanium elements. There were no skin changes to titanium and its compounds in both the test and control groups. Only one patient had a positive skin test which showed an allergic reaction to silver nitrate. Titanium fixing elements, as well as titanium dental implants, according to our research, do not show allergic skin reactions.
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Khudyk, Anton, and Sergey Grigorov. "Results of using 3-D simulation methods in treatment of midfacial fractures." ScienceRise, no. 2 (April 30, 2021): 54–65. http://dx.doi.org/10.21303/2313-8416.2021.001727.

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The article publishes the results of treatment of 27 patients with fractures of the face middle area, of which 14 used standard titanium mini-plates to reposition the fragments, and 13 – individual 3D simulated titanium mini-plates / grids. Before and after treatment, its effectiveness was assessed by the values of the displacements of bone fragments and the index of the visual-analog scale, which allows determining the functional and cosmetic effect of the surgery. It was found that the use of individual 3D simulated titanium mini-plates / grids allowed obtaining in 85 % of patients displacements not exceeding 3 mm. In 72 % of patients in whom standard titanium mini-plates were used, the displacement after surgery was 3.1–6 mm, which is significantly greater than in the group with individual modeling of structures. On the 7th day after surgery in the first group (treatment with standard mini-plates), the index on the visual-analog scale was 11 (7; 13), which was significantly (p=0.00147) less than before surgery. In the second group (treatment using individual 3D simulated titanium mini-plates / grids) the index on the visual analog scale was 4 (6; 8) points, which was significantly (Z=3.3; p=0.00098) less than before surgery. Comparison of the visual-analog scale of the first and second groups on the 7th day after surgery revealed the presence of significant (U=2.47; p=0.013) differences. The obtained results testify to the greater efficiency of individual 3D modeled titanium mini-plates / grids in comparison with standard titanium mini-plates. The object of the research: fractures of the middle area of the face. Comparison of the visual-analog scale of the first and second groups on the 7th day after surgery revealed the presence of significant (U=2.47; p=0.013) differences. Investigated problem: the comparative evaluation of the effectiveness of the middle area of the face fractures treatment using individual 3D simulated titanium mini-plates / grids and standard titanium mini-plates. The main scientific results: Optimizing the treatment of fractures of the face middle area will help to achieve good cosmetic and functional results. The area of practical use of the research results: Department of Surgical Dentistry and Maxillofacial Surgery. Innovative technological product: The proposed technique using individual 3D-simulated titanium miniplates will help to optimize the treatment of patients with traumatic fractures of the face middle area. Scope of the innovative technological product: Clinical practice.
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Ashok, V., Bharanija Kalidasan Selvi, and N. Gopi Chander. "Denture marker with titanium number plates." Journal of Forensic Radiology and Imaging 5 (June 2016): 47–49. http://dx.doi.org/10.1016/j.jofri.2016.03.001.

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Chowdhary, S. "Mandibular osteosynthesis using 3D titanium plates." International Journal of Oral and Maxillofacial Surgery 36, no. 11 (November 2007): 1074. http://dx.doi.org/10.1016/j.ijom.2007.08.420.

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Dissertations / Theses on the topic "Titanium plates"

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Duddukuri, Ramesh. "SYNTHESIZING AND CHARACTERIZATION OF TITANIUM DIBORIDE FOR COMPOSITE BIPOLAR PLATES IN PEM FUEL CELL." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/862.

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This research deals with the synthesis and characterization of titanium diboride (TiB2) from novel carbon coated precursors. This work provides information on using different boron sources and their effect on the resulting powders of TiB2.The process has two steps in which the oxide powders were first coated with carbon by cracking of a hydrocarbon gas, propylene (C3H6) and then, mixed with boron carbide and boric acid powders in a stoichiometric ratio. These precursors were treated at temperatures in the range of 1200-1400° C for 2 h in flowing Argon atmosphere to synthesize TiB2.The process utilizes a carbothermic reduction reaction of novel carbon coated precursor that has potential of producing high-quality powders (sub-micrometer and high purity). Single phase TiB2 powders produced, were compared with commercially available titanium diboride using X-ray diffraction and Transmission electron microscopy obtained from boron carbide and boric acid containing carbon coated precursor.
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Mjali, Kadephi Vuyolwethu. "Laser bending of commercially pure grade 2 titanium alloy plates: mechanisms analysis and characterisation of mechanical properties." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/d1021147.

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The processing of materials has become a specialist field and the industry will continue to grow due to rising costs in labour and raw materials which has forced many automotive industry suppliers to invest heavily in this field. In order to be relevant and competitive in today’s industrial world, companies in South Africa are now forced to dedicate billions of rands in profits to research and development. Metals like titanium are finding favour with automotive and aviation companies in pursuit of savings in fuel consumption. This saving is achieved by reducing weight on aircraft and automobiles yet still meeting acceptable and improved structural integrity. In-depth research into the behaviour of various materials under varying loading conditions is therefore essential. The study on the processing of commercially pure grade 2 titanium alloy plates focuses on the development of process parameters for bending the material using a 4kW Nd: YAG laser to an approximate radius of curvature of 120mm. The resulting mechanical properties of laser formed plates are then compared to those obtained from mechanically formed samples. The titanium parent material was used to benchmark the performance of formed samples. The effect of process parameters on the mechanical properties and structural integrity also formed part of this study. To obtain the bending parameters for laser forming, various combinations of processing speeds and laser powers were used. The line energy is dependent on the power and scanning velocity parameters and these are shown in table 1. The laser power, line energy and scanning velocity were the main parameters controlled in this study and the beam diameter remained unchanged. Residual stress analysis, micro-hardness and fatigue life testing were carried out to analyse mechanical properties and the structural integrity of the plate samples. Microstructural analysis was also done to observe changes in the material as a result of the forming processes. From the results it is evident that laser forming is beneficial to the hardness of titanium but detrimental to the fatigue life at higher line energies. Residual stress analysis showed the amount of stress within the study samples increased with each forming operation. This information was vital in the analysis of the fatigue life of titanium. A fatigue life prediction model was developed from this study and it shed some light on the behaviour of titanium in fatigue testing. The model could be used to predict fatigue life when no fatigue data is available for commercially pure grade 2 titanium alloy plates. In conclusion, this study helped establish parameters that could be used to bend titanium while the analysis of mechanical properties showed the limits of working with this alloy.
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Mjali, Kadephi Vuyolwethu. "Mechanisms, analysis and characterisation of mechanical properties of laser formed commercially pure grade 2 titanium alloy plates." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/d1021083.

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The processing of materials has become a specialist field and the industry will continue to grow due to rising costs in labour and raw materials which has forced many automotive industry suppliers to invest heavily in this field. In order to be relevant and competitive in today’s industrial world, companies in South Africa are now forced to dedicate billions of rands in profits to research and development. Metals like titanium are finding favour with automotive and aviation companies in pursuit of savings in fuel consumption. This saving is achieved by reducing weight on aircraft and automobiles yet still meeting acceptable and improved structural integrity. In-depth research into the behaviour of various materials under varying loading conditions is therefore essential. The study on the processing of commercially pure grade 2 titanium alloy plates focuses on the development of process parameters for bending the material using a 4kW Nd: YAG laser to an approximate radius of curvature of 120mm. The resulting mechanical properties of laser formed plates are then compared to those obtained from mechanically formed samples. The titanium parent material was used to benchmark the performance of formed samples. The effect of process parameters on the mechanical properties and structural integrity also formed part of this study. To obtain the bending parameters for laser forming, various combinations of processing speeds and laser powers were used. The line energy is dependent on the power and scanning velocity parameters and these are shown in table 1. The laser power, line energy and scanning velocity were the main parameters controlled in this study and the beam diameter remained unchanged. Residual stress analysis, micro-hardness and fatigue life testing were carried out to analyse mechanical properties and the structural integrity of the plate samples. Microstructural analysis was also done to observe changes in the material as a result of the forming processes. From the results it is evident that laser forming is beneficial to the hardness of titanium but detrimental to the fatigue life at higher line energies. Residual stress analysis showed the amount of stress within the study samples increased with each forming operation. This information was vital in the analysis of the fatigue life of titanium. A fatigue life prediction model was developed from this study and it shed some light on the behaviour of titanium in fatigue testing. The model could be used to predict fatigue life when no fatigue data is available for commercially pure grade 2 titanium alloy plates. In conclusion, this study helped establish parameters that could be used to bend titanium while the analysis of mechanical properties showed the limits of working with this alloy.
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Faghihi, Shahabeddin. "Effects of crystal size and orientation of novel titanium-based substrates on cell adhesion : implication for medical implants." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111882.

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The high performance of bone implants depends on the positive response of osteoblasts to the surface of the materials manufactured for the implant. Cell response in turn strongly depends on the nature of the initial interaction of macromolecules involved in cell adhesion and proliferation with the atomic structure of the surface of the material used for the implant. The initial interaction between bone specific extracellular matrix proteins and the solid substrate influences cell response at the cell-implant interface. This interaction is crucial for implant stability, long-term durability, and osseointegration. Despite extensive research undertaken to develop high-quality material for implants in order to improve the cell-substrate interaction, little is known about the significance of the atomic structure of the substrate and the role of molecular machinery involved in cell-substrate interaction. Using a combined approach involving material sciences and cell and molecular biology, the objectives of this research are to evaluate the response of pre-osteoblast and fibroblast cell lines to novel bulk polycrystalline and single crystal titanium based material and assess the role of crystal size and orientation.
Novel bulk nano-structured titanium substrates were produced by the process of high-pressure torsion (HPT). These materials have a significant advantage compared to conventional titanium-based materials by having higher surface wettablity, mechanical properties as well as a distinct surface oxide layer and atomic structure. A co-culture system was adapted to investigate the differential response of pre-osteoblast and fibroblast cell lines to titanium and titanium dioxide single-crystal substrates.
The results of this study provide clear evidence that crystal size and specific crystallographic orientation can be used to improve cell adhesion and proliferation. The nanostructured titanium substrates show strong interaction with pre-osteoblast cells as evident by the higher expression of fibronectin and the formation of extensive focal adhesion. Differential cell behaviour of pre-osteoblasts and fibroblasts are observed in cultures grown on the substrates with specific crystallographic orientations. The degree of cell attachment of the pre-osteoblasts is considerably higher on Ti-(1120) crystal face compared with the fibroblasts. These findings have profound implications for the improved osseointegration and inhibition of fibrosis leading to long-term implant consolidation and stability.
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Trivellato, Alexandre Elias. "Resistencia a flexão de fixação em osteotomia de costela bovina, variando o numero, a localização e a extensão das placas." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289684.

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Orientador: Luis Augusto Passeri
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo deste estudo foi avaliar a estabilidade da fixação promovida por placas e parafusos de titânio do sistema de 2,0 mm, realizada em osteotomia de costela bovina submetidas ao teste de resistência à flexão variando o número, a extensão e a localização das placas. Do teste de resistência à flexão, foram obtidos valores de carga aplicada e de deslocamento na área da osteotomia. Os valores foram avaliados por meio do teste de Tukey em nível de significância de 5%. Na carga aplicada foi observado melhor comportamento quando da utilização de duas placas de seis furos ou duas placas sendo uma de seis furos na base e de quatro furos na região superior. Em seguida, de duas placas de quatro furos e, em ordem decrescente, mas sem variação quanto ao tamanho das placas, por uma na porção superior e finalmente por uma na base. Quanto ao deslocamento, não houve variação pela extensão da placa, onde o menor valor foi observado para uma placa na posição superior e o pior com uma placa em borda inferior, não havendo diferença com duas placas relacionadas ao maior ou ao menor deslocamento
Abstract: The aim of this study was to evaluate the stability fixation promoted by titanium plates and screws of 2.0mm system. It was done in vitro by using 2.0mm system in osteotomies carried out in bovine ribs thereafter submitted to bending test changing the number, the extension, and the location of the plates. From bending tests were obtained the load applied and the gap between the superior cortices of bone in the osteotomy area. The values were compared through Tukey test with 5% of significance. Considering the applied load, the best results were seen when either two 6-hole plates or a combination of 6 hole and 4-hole were used, the former in the basis and the later superiorly. Those were followed by the results obtained with using two 4-hole plates. Lower applied loads were obtained, despite of the size, using only one plate superiorly and only one in the basis. Related to gap between the superior cortices of bone there was no influence of the plate extension, and the lower value was obtained with one plate superiorly and the higher was obtained with one plate in the basis
Doutorado
Cirurgia e Traumatologia Buco-Maxilo-Faciais
Doutor em Clínica Odontológica
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Klištinec, Dávid. "Deformační a napěťová analýza lebečních fixátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382556.

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Zranenia hlavy si často vyžadujú lekársku starostlivosť, pri ktorej dochádza k stabilizácii alebo náhrade poškodeného tkaniva. Pre tento účel slúži kranioplastika, ktorá prinavracia pacientovi ochranný a kozmetický výsledok. Výber správneho materiálu kraniálneho implantátu je veľmi podstatný. Naviac potrebuje správny druh fixácie, ktorá ho udrží na mieste a predíde sa tak nedovolenému pohybu implantátu počas bežného života pacienta. Táto práca analyzuje deformačné a napäťové stavy dvoch druhov fixačných plátov prichytených na PMMA implantáte a ich mechanickej odozvy na rozličné záťažné podmienky spôsobené rôznymi stavmi kraniálnej hypertenzie a silou pôsobiacou na sústavu z exteriéru.
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Pinto, Clarice Maia Soares de Alcântara 1986. "Metallographic, gas and energy dispersive x-ray analyses of osteosynthesis plates and screws and dental implants removed from patients with clinical indication = Análise metalográfica, de gases e espectrometria por energia dispersiva de raios-x de placas e parafusos para osteossíntese e de implantes dentários removidos de pacientes com indicação clínica." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287888.

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Orientador: Márcio de Moraes
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo do presente trabalho foi avaliar a microestrutura e a composição química dos implantes dentários, placas e parafusos para osteossíntese removidos de pacientes em casos com indicação clínica. No trabalho 1, foram realizadas análises metalográfica, de gases e de espectrometria por energia dispersiva de raios-X de placas e parafusos de titânio utilizados para osteossíntese e removidos de 30 pacientes. Os prontuários destes pacientes foram avaliados para obtenção de dados referentes à idade, gênero, procedimento cirúrgico que havia motivado a inserção das placas e parafusos para osteossíntese, a razão clínica para remoção e o tempo de permanência destes dispositivos in situ. Quarenta e oito placas e 238 parafusos foram removidos no total. Infecção consistiu na principal causa para remoção destes dispositivos, correspondendo a 43.3% dos casos. O principal sítio do qual as placas e os parafusos foram removidos foi a mandíbula, equivalendo a 66.6% dos casos. Todas as placas e parafusos analisados estavam dentro das normas F67 e F136 da ASTM (American Society for Testing and Materials) de acordo com a análise metalográfica e a espectrometria por energia dispersiva de raios-X. Na análise de gases, cinco amostras apresentaram valores acima do regulamentado pela ASTM para os elementos Hidrogênio e/ou Oxigênio. A partir do estudo, pôde-se concluir que as propriedades físicas e químicas das amostras não estavam associadas à condição clínica que ocasionou a remoção destes dispositivos e que o tempo de permanência destes implantes in situ não determinou alterações em suas propriedades. No trabalho 2, foram realizadas análises metalográfica e de espectrometria por energia dispersiva de raios-X para avaliação de 38 implantes dentários de titânio removidos de 29 pacientes com indicação clínica. Os prontuários destes pacientes foram avaliados para obtenção de dados referentes à idade, gênero, razão clinica para remoção e tempo de permanência dos implantes. Falta de osseointegração sem sintomatologia ou sinais de infecção associados foi a principal causa para falha dos implantes, correspondendo a 55.1% dos casos. A maxila foi o sítio de falha dos implantes dentários em dezessete pacientes (58.6%) enquanto doze pacientes (41.4%) apresentaram falha de implantes instalados na mandíbula. Todos os implantes analisados eram constituídos de titânio comercialmente puro e apresentaram-se dentro da norma F67 da ASTM. A partir do estudo, pôde-se concluir que as propriedades físicas e químicas dos implantes dentários analisados não estavam associadas ao insucesso no tratamento e à falha destes dispositivos
Abstract: The aim of this study was to evaluate the microstructure and chemical composition of dental implants, bone plates and screws removed from patients in cases of clinical indication. In the first study, metallographic, gas and energy dispersive X-ray analyses were performed to evaluate osteosynthesis plates and screws retrieved from 30 patients. The medical records of these patients were evaluated to obtain data regarding age, gender, surgical procedure that had motivated the insertion of osteosynthesis plates and screws, the reason for removal and the period of time of these devices in situ. Forty-eight plates and 238 screws were removed in total. Infection was the main reason for these devices removal, representing 43.3% of cases. Mandible was the main site for plates and screws removal, corresponding to 66.6% of cases. All plates and screws analyzed were within the specifications F67 and F136 of ASTM (American Society for Testing and Materials) according metallographic and energy dispersive X-ray analyses. In gas analysis, five samples had hydrogen and/or oxygen values above the regulated by ASTM. From the study, it was concluded that the physical and chemical properties of the samples were not associated with the clinical condition that caused the removal of these devices, and retention time of these implants did not determine changes in their properties. In the second study, metallographic and energy dispersive X-ray analyses were performed for evaluation of 38 dental implants removed from 29 patients with clinical indication. Medical records of these patients were evaluated to obtain data regarding age, gender, reason for removal and period of time in situ. Lack of osseointegration without symptomatology or signs of infection was the main reason for dental implants failure, corresponding to 55.1% of cases. Maxilla was the site of implants failure in seventeen patients (58.6%) while twelve patients (41.4%) had failure of dental implants installed in mandible. All dental implants analyzed were manufactured of commercially pure titanium and were within the ASTM F67 specification. From the study, it was concluded that physical and chemical properties of dental implants analyzed were not associated with failure of these devices.
Mestrado
Cirurgia e Traumatologia Buco-Maxilo-Faciais
Mestra em Clínica Odontológica
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Гудименко, Олена Олександрівна, Елена Александровна Гудыменко, Olena Oleksandrivna Hudymenko, Євген Вікторович Кузенко, Евгений Викторович Кузенко, Yevhen Viktorovych Kuzenko, Анатолій Миколайович Романюк, Анатолий Николаевич Романюк, and Anatolii Mykolaiovych Romaniuk. "Розробка титанових пластин для металостеосинтеза нижньої щелепи з урахуванням функції м'язового апарату." Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/64481.

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Остеосинтез широко використовується в щелепно-лицевій хірургії та травматології для усунення деформацій скелета різного генезу, тому до цих пір не припиняються пошуки сучасних матеріалів і пристроїв для фіксації кісткових фрагментів, які були б позбавлені всіх притаманних їм недоліків. Літературний аналіз показав, що під час сучасного дослідження металостеосинтеза за допомогою комп'ютерного моделювання спрощуються вектори м'язової тяги і остеопоротичні зміни в кістковій тканині.
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Yoon, Hyungjin. "Effect of substrate bias and temperature on the structure of ion-plated titanium." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/19167.

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Lowe, Michael John Stuart. "Plate waves for the NDT of diffusion bonded titanium." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/8011.

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Books on the topic "Titanium plates"

1

Zhishou, Zhu, and Wang Honghong, eds. Xian jin hang kong tai he jin cai liao yu ying yong: Advanced aeronautical titanium alloys and applications. Beijing Shi: Guo fang gong ye chu ban she, 2012.

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Savko, A. D. Titan-t︠s︡irkonievye rossypi T︠S︡entralʹno-Chernozemnogo raĭona. Voronezh: Izd-vo Voronezhskogo universiteta, 1995.

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Bialy, Bialy Hosney Mohamed El. A metallurgical and machining study of the behaviour of ion plated titanium nitride coated high speedsteel cutting tools. Salford: University of Salford, 1986.

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Western Australia. Dept. of Resources Development. Laporte effluent disposal: Environmental review and management Programme : stage I, evaluation of options and recommendations for a preferred long term strategy. [Perth, W.A.]: The Department, 1985.

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Grosz, A. E. Titanium-zirconium-rare-earth placer resources potential of surficial sediments on the Atlantic Continental Shelf offshore of New York, Rhode Island, and southern Massachusetts. [Reston, VA]: U.S. Dept. of the Interior, Geological Survey, 1991.

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Grosz, A. E. Titanium-zirconium-rare-earth placer resources potential of surficial sediments on the Atlantic Continental Shelf offshore of New York, Rhode Island, and southern Massachusetts. [Reston, VA]: U.S. Dept. of the Interior, Geological Survey, 1991.

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Grosz, A. E. Titanium-zirconium-rare-earth placer resources potential of surficial sediments on the Atlantic Continental Shelf offshore of New York, Rhode Island, and southern Massachusetts. [Reston, VA]: U.S. Dept. of the Interior, Geological Survey, 1991.

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Grosz, A. E. Titanium-zirconium-rare-earth placer resources potential of surficial sediments on the Atlantic Continental Shelf offshore of New York, Rhode Island, and southern Massachusetts. [Reston, VA]: U.S. Dept. of the Interior, Geological Survey, 1991.

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Schulz, Paul. Materials research for high speed civil transport and generic hypersonics: Metals durability. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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Morris, Deborah L. Infrared microspectroscopy of natural dyes and isomeric aminophenols separated by high performance thin layer chromatographic plates made of titanium dioxide. 1990.

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Book chapters on the topic "Titanium plates"

1

Prados-Privado, M., H. Diederich, S. A. Gehrke, and J. C. Prados-Frutos. "Numerical analysis of titanium hybrid-plates in atrophic maxilla." In Biodental Engineering V, 1–4. London, UK; Boca Raton, FL: Taylor & Francis Group, [2019] |: CRC Press, 2019. http://dx.doi.org/10.1201/9780429265297-1.

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Sun, Qingjie, Junzhao Li, Yibo Liu, and Jicai Feng. "Narrow Gap Welding for Thick Titanium Plates: A Review." In Transactions on Intelligent Welding Manufacturing, 29–54. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8668-8_2.

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Violatos, I., M. Thomas, J. B. Castle, and B. P. Wynne. "Sub-Surface Plastic and Elastic Strain Fields and Fatigue Performance Of Drilled Titanium Plates." In Proceedings of the 13th World Conference on Titanium, 1035–40. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119296126.ch176.

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Kajzer, Anita, Sabina Niedźwiedź, Wojciech Kajzer, Jan Marciniak, Bożena Gzik-Zroska, Kamil Joszko, Marcin Kaczmarek, and Zbigniew Pilecki. "Study of Strength and Fatigue of Stainless Steel and Titanium Plates." In Innovations in Biomedical Engineering, 269–77. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52180-6_29.

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Forouzanmehr, Mohsen, Kazem Reza Kashyzadeh, Amirhossein Borjali, Mosayeb Jafarnode, and Mahmoud Chizari. "Effects of CrN/TiN Coatings on Interfacial Contact Resistance of Stainless Steel 410 Bipolar Plates in Fuel Cells." In Springer Proceedings in Energy, 133–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_17.

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AbstractChallenge on energy resources exists, especially when the fossil resources are limited. Fuel cells, as an alternative replacement, can be used. Fuel cells with coated bipolar plates are the interest of this paper. Current research is concerned with the effects of CrN/TiN coatings on interfacial contact resistance (ICR). Stainless steel 410 was selected as a base metal, and the coating process was performed using chromium nitride and titanium nitride by cathodic arc evaporation method. It was found that the surface roughness and ICR values of CrN-coated sample are lower than the TiN-coated sample. The concluded that the CrN layer could be replaced with the TiN layer for better performance of bipolar plates.
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Dmitriev, Sergey, Alexey Ishkov, Vladimir Malikov, and Anatoly Sagalakov. "Non-destructive Testing of Quality of Welded Joints of Titanium Plates of Superminiature Eddy-Current Probes." In VIII International Scientific Siberian Transport Forum, 980–89. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-37916-2_96.

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Li, Yan, R. Bruce Thompson, John H. Root, and Tom M. Holden. "Determination of Texture in Plates of HCP Metals Zirconium and Titanium by Ultrasound and Neutron Diffraction." In Nondestructive Characterization of Materials IV, 467–74. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4899-0670-0_56.

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Bobik, Grzegorz, Jarosław Żmudzki, and Tomasz Tański. "Simulation Investigation of Occlusal Loads Transfer in Personalized Titanium Plates in the Case of Jaw Osteotomy." In Innovations in Biomedical Engineering, 89–95. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52180-6_11.

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Manikandan, P., Kazuyuki Hokamoto, S. H. Ghaderi, and Naresh N. Thadhani. "Observation of High Velocity Oblique Collision of Titanium and Stainless Steel Plates by Using Gas Gun." In Explosion, Shock Wave and Hypervelocity Phenomena, 273–78. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-465-0.273.

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Martín, Castillo-Sánchez, Velázquez-Vázquez María, Vite-Torres Manuel, and Gallardo-Hernández Ezequiel. "Microabrasive Wear of Titanium Chrome Plated." In Proceedings of the 7th International Conference on Fracture Fatigue and Wear, 602–14. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0411-8_54.

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Conference papers on the topic "Titanium plates"

1

Tong, Kwok-On. "A numerical study on laser forming of titanium plates." In ICALEO® ‘98: Proceedings of the Laser Materials Processing Conference. Laser Institute of America, 1998. http://dx.doi.org/10.2351/1.5059140.

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Montanari, Mattia, Petros Siegkas, Antonio Pellegrino, and Nik Petrinic. "NURBS-BASED ISOGEOMETRIC ANALYSIS FOR BALLISTIC EVALUATION OF TITANIUM PLATES." In VII European Congress on Computational Methods in Applied Sciences and Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2016. http://dx.doi.org/10.7712/100016.2394.9281.

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Lu Chao and Cheng Jianjun. "Surface Roughness Measurements of Titanium Alloy Plates Using Improved Ultrasonic Spectroscopy." In 2007 8th International Conference on Electronic Measurement and Instruments. IEEE, 2007. http://dx.doi.org/10.1109/icemi.2007.4350427.

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Koshuro, Vladimir A., and Aleksandr A. Fomin. "Numerical simulation of induction vacuum deposition of titanium on steel plates." In Saratov Fall Meeting 2020: Optical and Nano-Technologies for Biology and Medicine, edited by Valery V. Tuchin and Elina A. Genina. SPIE, 2021. http://dx.doi.org/10.1117/12.2591773.

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Isaev, V. I., A. N. Cherepanov, and V. P. Shapeev. "Modeling of laser welding of steel and titanium plates with a composite insert." In PROCEEDINGS OF THE XXV CONFERENCE ON HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2017): Dedicated to the 60th anniversary of the Khristianovich Institute of Theoretical and Applied Mechanics SB RAS. Author(s), 2017. http://dx.doi.org/10.1063/1.5007566.

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Caiazzo, Fabrizia, Vittorio Alfieri, Gaetano Corrado, Francesco Cardaropoli, and Vincenzo Sergi. "Investigation and Optimization of Laser Welding of Ti-6Al-4V Titanium Alloy Plates." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1134.

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Titanium alloys are employed for several applications, ranging from aerospace to medicine. In particular, Ti-6Al-4V is the most common, thanks to an excellent combination of low density, high specific strength and corrosion resistance. Laser welding has been increasingly considered as an alternative to traditional techniques to join titanium alloys. An increase in penetration depth and a reduction of possible welding defects is achieved indeed; moreover a smaller grain size in the fused zone is benefited in comparison to either TIG and plasma arc welding, thus providing an increase in the tensile strength of the welded structures. The aim of this work is to develop the regression model for a number of responses which are crucial for the feature of the joint. The study was carried out on 3 mm thick Ti-6Al-4V plates; a square butt welding configuration was considered employing a disk-laser source. A 3-level factorial plan was hence arranged in a face-centred cubic scheme. The responses were analyzed referring to the governing parameters. Then, an optimization was carried out via statistical tools, in order to find the optimal welding set-up for the alloy under examination.
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Mjali, Kadephi V., Annelize Els-Botes, and Peter M. Mashinini. "The Effects of Laser and Mechanical Forming on the Hardness and Microstructural Layout of Commercially Pure Grade 2 Titanium Alloy Plates." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2603.

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This paper illustrates the effects of the laser and mechanical forming on the hardness and microstructural distribution in commercially pure grade 2 Titanium alloy plates. The two processes were used to bend commercially pure grade 2 Titanium alloy plates to a similar radius also investigate if the laser forming process could replace the mechanical forming process in the future. The results from both processes are discussed in relation to the mechanical properties of the material. Observations from hardness testing indicate that the laser forming process results in increased hardness in all the samples evaluated, and on the other hand, the mechanical forming process did not influence hardness on the samples evaluated. There was no change in microstructure as a result of the mechanical forming process while the laser forming process had a major influence on the overall microstructure in samples evaluated. The size of the grains became larger with increases in thermal gradient and heat flux, causing changes to the overall mechanical properties of the material. The thermal heat generated has a profound influence on the grain structure and the hardness of Titanium. It is evident that the higher the thermal energy the higher is the hardness, but this only applies up to a power of 2.5kW. Afterwards, there is a reduction in hardness and an increase in grain size. The cooling rate of the plates has been proved to play a significant role in the resulting microstructure of Titanium alloys. The scanning speed plays a role in maintaining the surface temperatures of laser formed Titanium plates resulting in changes to both hardness and the microstructure. An increase in heat results in grain growth affecting the hardness of Titanium.
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Andoh, Y., S. Tobe, H. Tahara, and T. Yoshikawa. "Nitriding of Titanium Plate and Atmospheric Plasma Sprayed Titanium Coating using Nitrogen Plasma Jets Under a Low Pressure Environment." In ITSC 1999, edited by E. Lugscheider and P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0234.

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Abstract In this paper, as a basic study of the plasma jet process under a low pressure, the nitriding of titanium plates and atmospheric plasma sprayed titanium coatings are carried out using nitrogen and hydrogen added nitrogen plasma jets at 30Pa. The plasma torch used in this paper is equipped with a supersonic expansion nozzle to improve the acceleration efficiency of plasma jets. The effects of ambient pressures and supersonic expansion nozzles on transformation of plasma particles are examined from gas-dynamical viewpoints. It was observed that from the results, the supersonic plasma jet process under a low pressure was proved to have a high potential for nitriding. Paper includes a German-language abstract.
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9

Mjali, Kadephi V., Annelize Els-Botes, and Peter M. Mashinini. "Residual Stress Distribution and the Concept of Total Fatigue Stress in Laser and Mechanically Formed Commercially Pure Grade 2 Titanium Alloy Plates." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2604.

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This paper discusses the investigation of residual stresses developed as a result of mechanical and laser forming processes in commercially pure grade 2 Titanium alloy plates as well as the concept of total fatigue stress. The intention of the study was to bend the plates using the respective processes to a final radius of 120mm using both processes. The hole drilling method was used to measure residual strains in all the plates. High stress gradients were witnessed in the current research and possible cases analyzed and investigated. The effects of processing speeds and powers used also played a significant role in the residual stress distribution in all the formed plates. A change in laser power resulted in changes to residual stress distribution in the plates evaluated. This study also dwells into how the loads that are not normally incorporated in fatigue testing influence fatigue life of commercially pure grade 2 Titanium alloy plates. Also, the parent material was used to benchmark the performance of the two forming processes in terms of stresses developed. Residual stresses developed from the two forming processes and those obtained from the parent material were used. The residual stress values were then added to the mean stress and the alternating stress from the fatigue machine to develop the concept of total fatigue stress. This exercise indicated the effect of these stresses on the fatigue life of the parent material, laser and mechanically formed plate samples. A strong link between these stresses was obtained and formulae explaining the relationship formulated. A comparison between theory and practical application shown by test results is found to be satisfactory in explaining concerns that may arise. The laser forming process is more influential in the development of residual stress, compared to the mechanical forming process. With each parameter change in laser forming there is a change in residual stress arrangement. Under the influence of laser forming the stress is more tensile in nature making the laser formed plate specimens more susceptible to early fatigue failure. The laser and mechanical forming processes involve bending of the plate samples and most of these samples experienced a two-dimensional defect which is a dislocation. The dislocation is the defect responsible for the phenomenon of slip by which most metals deform plastically. Also the high temperatures experienced in laser forming were one of the major driving factors in bending.
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Fukunaga, Kazuhiro, Rikio Chijiiwa, Yoshiyuki Watanabe, Akihiko Kojima, Yoshihide Nagai, Nobuhiko Mamada, Toshihiko Adachi, et al. "Advanced Titanium Oxide Steel With Excellent HAZ Toughness for Offshore Structures." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20319.

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The feature of titanium oxide steel (Ti-O steel) is that heat affected zone (HAZ) toughness is improved due to the refinement of HAZ microstructure through the formation of intragranular ferrite (IGF). This desirable microstructure, IGF, forms radially from titanium oxide particles. Recently, it has been clarified that manganese in Ti-O steel is an indispensable element for the formation of IGF. Therefore, manganese effects on Ti-O steel have been basically studied in this work, and then a new effect has been found. In Ti-O steel, manganese has the effect of suppressing the formation of ferrite side plates (FSP), which are undesirable due to their coarseness. Consequently, HAZ microstructure of Ti-O steel with high manganese content is so refined that HAZ toughness is remarkably improved. Based on the manganese effects, steel plates with excellent HAZ toughness for offshore structures have been developed and commercially mass-produced. The welded joints exhibit excellent toughness.
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Reports on the topic "Titanium plates"

1

Wells, Michael E., and Roy A. Lindauer. A Test Method for Dynamic Tear Testing of Titanium Plate Using a Nonstandard Specimen. Fort Belvoir, VA: Defense Technical Information Center, August 1998. http://dx.doi.org/10.21236/ada351981.

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