نتایج جستجو برای: porous titanium

تعداد نتایج: 84614  

2015
Julia Matena Svea Petersen Matthias Gieseke Andreas Kampmann Michael Teske Martin Beyerbach Hugo Murua Escobar Heinz Haferkamp Nils-Claudius Gellrich Ingo Nolte

To improve well-known titanium implants, pores can be used for increasing bone formation and close bone-implant interface. Selective Laser Melting (SLM) enables the production of any geometry and was used for implant production with 250-µm pore size. The used pore size supports vessel ingrowth, as bone formation is strongly dependent on fast vascularization. Additionally, proangiogenic factors ...

2017
Michael Grau Julia Matena Michael Teske Svea Petersen Pooyan Aliuos Laura Roland Niels Grabow Hugo Murua Escobar Nils-Claudius Gellrich Heinz Haferkamp Ingo Nolte

Titanium is widely used as a bone implant material due to its biocompatibility and high resilience. Since its Young's modulus differs from bone tissue, the resulting "stress shielding" could lead to scaffold loosening. However, by using a scaffold-shaped geometry, the Young's modulus can be adjusted. Also, a porous geometry enables vascularisation and bone ingrowth inside the implant itself. Ad...

2013
Xuan Zhang Chao Hu Hua Bai Yan Yan Junfang Li Haifeng Yang Xiaojing Lu Guangcheng Xi

The degradation of toxic gases and liquids using a catalyst and solar energy is an ideal method, compared with landfill and combustion methods. The search for active semiconductor photocatalysts that efficiently decompose contaminations under light irradiation remains one of the most challenging tasks for solar-energy utilization. In this work, free-supporting three-dimensional (3D) nanosheeted...

2010
Ziya ESEN Elif TARHAN BOR Şakir BOR

Porous titanium and Ti6Al4V alloy, biomedical candidate materials for use in orthopedic and dental implants, were manufactured by sintering the powders at various temperatures in loose condition. The characteristics of the corresponding powders and utilized sintering temperatures limited the final porosities in the range 30-37.5 vol. %. Similar to wrought alloys, compression stress-strain curve...

2005
Jaeyoung Lee Jinsub Choi Jaekwang Lee Sang Kyo Choi Hee Dong Chun

Titanium oxide (TiO2) nanowires were prepared for an electrolytic capacitor application by the automatic dipping technique using a porous alumina template. The automatic dipping technique allows us to exactly control the dipping rate so that we can obtain homogenous infiltration of nanowires in the porous alumina membrane, even though the solution is very acidic. From the TEM, SEM and XRD measu...

2009
G. Ahuja K. Pathak

Considerable research efforts have been directed in recent years towards the development of porous carriers as controlled drug delivery matrices because of possessing several features such as stable uniform porous structure, high surface area, tunable pore size and well-defined surface properties. Owing to wide range of useful properties porous carriers have been used in pharmaceuticals for man...

2007
S. Vasić L. Baumgartner

X-ray computed micro tomography (CT) is an alternative technique to the classical methods such as mercury intrusion (MIP) and gas pycnometry (HP) to obtain the porosity, pore-size distribution, and density of porous materials. Besides the advantage of being a nondestructive method, it gives not only bulk properties, but also spatially resolved information. In the present work, uniaxially presse...

Journal: :Ultrasonics sonochemistry 2013
Alberto Naldoni Claudia L Bianchi Carlo Pirola Kenneth S Suslick

The synthesis of highly-crystalline porous TiO(2) microspheres is reported using ultrasonic spray pyrolysis (USP) in the presence of colloidal silica as a template. We have exploited the interactions between hot SiO(2) template particles surface and TiO(2) precursor that occur during reaction inside the droplets, to control the physical and chemical properties of the resulting particles. Varyin...

Journal: :Chemistry, an Asian journal 2014
Guojun Du Zhaolin Liu Siok Wei Tay Xiaogang Liu Aishui Yu

Porous microspherical Li4Ti5O12 aggregates (LTO-PSA) can be successfully prepared by using porous spherical TiO2 as a titanium source and lithium acetate as a lithium source followed by calcinations. The synthesized LTO-PSA possess outstanding morphology, with nanosized, porous, and spherical distributions, that allow good electrochemical performances, including high reversible capacity, good c...

Journal: :The journal of contemporary dental practice 2015
Yuri Wanderley Cavalcanti Rodrigo Villamarim Soare Marina Araújo Leite Assis Elton Gonçalves Zenóbio Francisco Mauro da Silva Girundi

UNLABELLED Some surface treatments performed on titanium can alter the composition of salivary pellicle formed on this abiotic surface. Such treatments modify the titanium's surface properties and can promote higher adsorption of proteins, which allow better integration of titanium to the biotic system. PURPOSE This study aimed to evaluate the interactions between salivary proteins and titani...

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