Titanium foams for biomedical applications: a review

Singh, Randhir; Lee, Peter; Dashwood, R. J.; Lindley, T.C.

doi:10.1179/175355510x12744412709403

Cited by 147 publications

(75 citation statements)

References 91 publications

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“…Additionally, they should have stiffness close to that of natural bone, and good corrosion resistance and fatigue strength as well [1]. Titanium and its alloys have good corrosion resistance and fatigue strength under simulated bio-fluids and thus show excellent biocompatibility with bone scaffold [2]. Only stiffness of Ti (110 GPa) [3] does not match with that of human bones [4], which creates stress shielding at the interface between bone and bone scaffold, and as a consequence, the patient feels uncomfortable.…”

Section: Introductionmentioning

confidence: 99%

The effect of the particle shape and strain rate on microstructure and compressive deformation response of pure Ti-foam made using acrowax as space holder

Mondal

Patel

Jain

et al. 2015

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

The effect of the particle shape and strain rate on microstructure and compressive deformation response of pure Ti-foam made using acrowax as space holder

Mondal

Patel

Jain

et al. 2015

Materials Science and Engineering: A

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“…Several review articles on scaffold materials and fabrication technologies highlight the space holder method as one of the effective methods for the fabrication of metallic biomedical scaffolds, owing to its ability to produce a wide range of porosity levels and controllable pore geometry in scaffolds [43,10]. Type, size and morphology of the space-holding particles determine the porous structure and mechanical properties of the manufactured structure [3].…”

Section: Introductionmentioning

confidence: 99%

Development of tantalum scaffold for orthopedic applications produced by space-holder method

et al. 2015

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a b s t r a c tIn the present study, production of tantalum porous scaffolds using the space holder technique was performed. The effect of size and content of sodium chloride particles, used as space holder, as well as compacting pressure on foam structure and mechanical properties have been investigated. The morphological characterization was carried out by means of scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP) and micro-CT technique. The relationship between the elastic modulus and yield strength of the tantalum porous scaffold and the pore structure was evaluated. Space holder technique allows obtaining tantalum open-cell structure (70% of porosity) and modulus of elasticity similar to cancellous bone, with reproducible processability into three-dimensional structures and reasonable manufacturing costs.

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“…[1] Microporous titanium provides two additional advantages for implant applications: first, it reduces the stiffness of the material, thus reducing stress shielding, [2,3] and, second, it improves implant anchorage by allowing bone ingrowth. [4][5][6] To date, powder metallurgy approaches have been widely used to create porous Ti structures, through partial sintering, [7][8][9] inclusion of pore formers, [10][11][12][13] expansion of pores pressurized with argon or hydrogen gas, [14,15] or replication of cellular polymers. [16,17] Embrittlement often arises during processing due to the strong chemical affinity of titanium at elevated temperature with atmospheric oxygen, carbon, and nitrogen.…”

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confidence: 99%

Microstructure and Mechanical Properties of Reticulated Titanium Scrolls

et al. 2011

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Titanium and its alloys find widespread use in skeletal implants and biomedical devices (e.g., stents and orthodontic applications) owing to their excellent corrosion resistance, bio-compatibility, static and fatigue strength, and lack of magnetism (an important property for magnetic imaging). [1] Microporous titanium provides two additional advantages for implant applications: first, it reduces the stiffness of the material, thus reducing stress shielding, [2,3] and, second, it improves implant anchorage by allowing bone ingrowth. [4][5][6] To date, powder metallurgy approaches have been widely used to create porous Ti structures, through partial sintering, [7][8][9] inclusion of pore formers, [10][11][12][13] expansion of pores pressurized with argon or hydrogen gas, [14,15] or replication of cellular polymers. [16,17] Embrittlement often arises during processing due to the strong chemical affinity of titanium at elevated temperature with atmospheric oxygen, carbon, and nitrogen. Alternate efforts have focused on producing microarchitectured titanium, composed of lattice or truss structures with struts arranged periodically in space. These structures exhibit an outstanding combination of low density, high strength and stiffness, and good damage tolerance. [18] To date, production methods for microarchitectured titanium have focused on replication precision casting, [19,20] sintering of stacked wire arrays, [21] as well as selective electron beam, [22][23][24] or laser [25] sintering of Ti powders.Recently, we introduced a new method for creating 3D microarchitectured Ti structures that combines: [26] (i) direct ink writing (DIW) of planar lattices composed of two layers of orthogonally oriented, patterned TiH 2 filament arrays, followed by (ii) rolling of these pliable lattices into scrolls, or folding into complex three-dimensional shapes, and finally (iii) heat-treating to reduce the hydride to metallic titanium. This new method is characterized by its simplicity, high shape versatility, and ability to control local geometry, as well as scalability to larger structures. [26] Here, we use this novel COMMUNICATION[*] Prof.

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Titanium foams for biomedical applications: a review

Cited by 147 publications

References 91 publications

The effect of the particle shape and strain rate on microstructure and compressive deformation response of pure Ti-foam made using acrowax as space holder

The effect of the particle shape and strain rate on microstructure and compressive deformation response of pure Ti-foam made using acrowax as space holder

Development of tantalum scaffold for orthopedic applications produced by space-holder method

Microstructure and Mechanical Properties of Reticulated Titanium Scrolls

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