Mechanical Properties of Porous Ti-Mo and Ti-Nb Alloys for Biomedical Application by Gelcasting

Yang, Di; Guo, Zhimeng; Shao, Huiping; Liu, Xiaoting; Ye, Ji

doi:10.1016/j.proeng.2012.03.025

Cited by 47 publications

(42 citation statements)

References 15 publications

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“…A large number of studies on the effects of porosity and pore size on the biological properties of the hard tissue implant materials have been reported [20,[48][49][50]. The porosities of the Ti-15Mo alloys are in the optimal range of 20%-50% for load-bearing bone implant materials [23], which should be beneficial to the initiation of bone formation, providing enough space for bone tissue reconstruction and ingrowth [51]. Moreover, the pore sizes of the porous Ti-15Mo alloys with adding NH 4 HCO 3 ranging from 120 to 220 μm are beneficial to the new bone growth, since the optimal pore size is considered to be 100-400 μm [20,52].…”

Section: Resultsmentioning

confidence: 99%

“…Recently, there are some reports about the porous TiMo alloys prepared by different methods, such as vacuum sintering [9,10], gelcasting [23], selective laser sintering [24,25] and atmosphere protection conventional sintering [21,26]. Microwave sintering is a new powder metallurgy sintering method to prepare the porous metallic materials, such as porous NiTi alloys [27,28], porous Ti6Al4V/ TiC/HA composites [29] and porous Ti/CaP composites [30].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

Zhang

Bao

et al. 2017

Sci. China Mater.

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Biomedical porous Ti-15Mo alloys were prepared by microwave sintering using ammonium hydrogen carbonate (NH 4 HCO 3 ) as the space holder agent to adjust the porosity and mechanical properties. The porous Ti-15Mo alloys are dominated by β-Ti phase with a little α-Ti phase, and the proportion of α and β phase has no significant difference as the NH 4 HCO 3 content increases. The porosities and the average pore sizes of the porous Ti-15Mo alloys increase with increase of the contents of NH 4 HCO 3 , while all of the compressive strength, elastic modulus and bending strength decrease. However, the compressive strength, bending strength and the elastic modulus are higher or close to those of natural bone. The surface of the porous Ti-15Mo alloy was further modified by hydrothermal treatment, after which Na 2 Ti 6 O 13 layers with needle and flake-like clusters were formed on the outer and inner surface of the porous Ti-15Mo alloy. The hydrothermally treated porous Ti-15Mo alloy is completely covered by the Ca-deficient apatite layers after immersed in SBF solution for 14 d, indicating that it possesses high apatiteforming ability and bioactivity. These results demonstrate that the hydrothermally treated microwave sintered porous Ti15Mo alloys could be a promising candidate as the bone implant.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

Zhang

Bao

et al. 2017

Sci. China Mater.

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“…In both cases, the osseointegration process would be stimulated with the pores' presence in the produced materials. However, other technologies allow limiting these materials' modulus even further, such as the gel casting technique, which should be the object of further studies [56]. Figure 5.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Composite and Surface Functionalization of Ultrafine-Grained Ti23Zr25Nb Alloy for Medical Applications

et al. 2020

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In this study, the ultrafine-grained Ti23Zr25Nb-based composites with 45S5 Bioglass and Ag, Cu, or Zn additions were produced by application of the mechanical alloying technique. Additionally, the base Ti23Zr25Nb alloy was electrochemically modified in the two stages of processing: electrochemical etching in the solution of H3PO4 and HF followed by electrochemical deposition in Ca(NO3)2, (NH4)2HPO4, and HCl. The in vitro cytocompatibility studies were also done with comparison to the commercially pure titanium. The established cell lines of Normal Human Osteoblasts (NHost, CC-2538) and Human Periodontal Ligament Fibroblasts (HPdLF, CC-7049) were used. The culture was conducted among the tested materials. Ultrafine-grained titanium-based composites modified with 45S5 Bioglass and Ag, Cu, or Zn metals have higher biocompatibility than the reference material in the form of a microcrystalline Ti. Proliferation activity was at a stable level with contact with studied materials. In vitro evaluation research showed that the ultrafine-grained Ti23Zr25Nb-based composites with 45S5 Bioglass and Ag, Cu, or Zn additions, with a Young modulus below 50 GPa, can be further used in the biomedical field.

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“…After demolding, drying, binder removal and sintering, the products are available. Average pore size of 102 to 110 lm of porous Ti-(12.5 -17.5) Mo alloys with porosity ranging from 40.15 to 46.32 % prepared by gelcasting would allow bone tissue to grow inside the foam [26,27].…”

Section: Gelcastingmentioning

confidence: 99%

“…The latter is relevant to biochemical compatibility. The Young's moduli of the aforementioned metals ranging from 120 to 232 GPa are substantially larger than those of cancellous (1 -2 GPa) and cortical (20)(21)(22)(23)(24)(25)(26)(27) bones [5]. Therefore, stress shielding, a critical issue in hard tissue replacement, which originates from the mismatch of Young's modulus, may cause osteoporosis of the surrounding bone tissue.…”

Section: Introductionmentioning

confidence: 99%

Current developments of biomedical porous Ti–Mo alloys

Wang

2017

International Journal of Materials Research

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Current developments of biomedical porous Ti-Mo alloysAs a biomedical hard tissue implant candidate, porous Ti-Mo alloy has received considerable attention because of its special porous structure, appropriate Young's modulus and compressive strength as well as good corrosion resistance. As a bioactive coating, hydroxyapatite is commonly used to cover the surface of bioinert metallic prostheses due to its excellent biocompatibility, bone-like structure and composition. This article reviews the current developments and the relationships between the fabrication methods, porous structure, mechanical properties, bioactive surface modification and corrosion behavior of porous Ti-Mo alloy used for hard tissue implant application. Furthermore, the future research directions are discussed to optimize the porous structure and improve the properties of porous Ti-Mo alloys.

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Mechanical Properties of Porous Ti-Mo and Ti-Nb Alloys for Biomedical Application by Gelcasting

Cited by 47 publications

References 15 publications

Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

Preparation and bioactive surface modification of the microwave sintered porous Ti-15Mo alloys for biomedical application

Composite and Surface Functionalization of Ultrafine-Grained Ti23Zr25Nb Alloy for Medical Applications

Current developments of biomedical porous Ti–Mo alloys

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