Printing of Titanium implant prototype

Wiria, Florencia Edith; Shyan, John Yong Ming; Lim, Poon Nian; Goh, C. W.; Yeo, Jin-Fei; Cao, Tong

doi:10.1016/j.matdes.2009.12.050

Cited by 91 publications

(66 citation statements)

References 16 publications

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“…A 3DP-fabricated, porous Ti implant by Wiria et al 4) had compressive strength of 167-455 MPa and elastic modulus of 4.8-13.2 GPa -which was compatible with the elastic modulus of the natural bone. In the present study, the mechanical properties of sintered porous Ti implant increased significantly with increase of sintering temperature.…”

Section: Discussionmentioning

confidence: 81%

“…Across the cross-sections of porous Ti implants, SEM micrographs showed well-defined porous structures with uniformly distributed pores of 50-70 μm as well as sparsely scattered large pores of 120-150 μm. It has been shown that sintered density increased, but porosity decreased, with increase of sintering temperature 4) . Results of this study showed that porosity indeed decreased significantly with increase of sintering temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Porous Ti reportedly had bonelike mechanical properties which could resist continuous loading comparable to the loading conditions imposed on the human jaw 3) . Cell culture study showed that porous Ti had good biocompatibility and was conducive to bone cell attachment and proliferation 4) . Bone tissue could grow inside the porous Ti structure and maintain a long and stable connection between the implant and the human bone 3) .…”

Section: Introductionmentioning

confidence: 99%

“…Bone tissue could grow inside the porous Ti structure and maintain a long and stable connection between the implant and the human bone 3) . Therefore, porous Ti seemed to be a viable candidate for use in dental and biomedical applications, such as implants and tissue-engineering scaffolds [3][4][5][6][7] . Methods used to produce porous bulk Ti included loose powder sintering, gelcasting, and slurry foaming 6,8,9) .…”

Section: Introductionmentioning

confidence: 99%

“…In the fabrication of customized implants, geometric precision is one of the most important considerations 10) because precisely correct implant shape and size would ensure that the implant fit nicely to the patient 4) . Threedimensional printing (3DP) is a solid freeform fabrication (SFF) technology.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of porous titanium implants by three-dimensional printing and sintering at different temperatures

2012

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This study evaluated the feasibility of using three-dimensional printing (3DP) to fabricate porous titanium implants. Titanium powder was blended with a water-soluble binder material. Green, porous, titanium implants fabricated by 3DP were sintered under protective argon atmosphere at 1,200, 1,300, or 1,400°C. Sintered implant prototypes had uniform shrinkage and no obvious shape distortion after sintering. Evaluation of their mechanical properties revealed that titanium prototypes sintered at different temperatures had elastic modulus of 5.9-34.8 GPa, porosity of 41.06-65.01%, hardness of 115.2-182.8 VHN, and compressive strength of 81.3-218.6 MPa. There were significant differences in each type of these data among the different sintering temperatures (p<0.01). Results of this study confirmed the feasibility of fabricating porous titanium implants by 3DP: pore size and pore interconnectivity were conducive to bone cell ingrowth for implant stabilization, and the mechanical properties matched well with those of the human bone.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of porous titanium implants by three-dimensional printing and sintering at different temperatures

2012

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A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

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Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

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Characterizations of additive manufactured porous titanium implants

et al. 2012

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This article describes physical, chemical, and mechanical characterizations of porous titanium implants made by an additive manufacturing method to gain insight into the correlation of process parameters and final physical properties of implants used in orthopedics. For the manufacturing chain, the powder metallurgy technology was combined with the additive manufacturing to fabricate the porous structure from the pure tanium powder. A 3D printing machine was employed in this study to produce porous bar samples. A number of physical parameters such as titanium powder size, polyvinyl alcohol (PVA) amount, sintering temperature and time were investigated to control the mechanical properties and porosity of the structures. The produced samples were characterized through porosity and shrinkage measurements, mechanical compression test and scanning electron microscopy (SEM). The results showed a level of porosity in the samples in the range of 31-43%, which is within the range of the porosity of the cancelluous bone and approaches the range of the porosity of the cortical bone. The results of the mechanical test showed that the compressive strength is in the wide range of 56-509 MPa implying the effect of the process parameters on the mechanical strengths. This technique of manufacturing of Ti porous structures demonstrated a low level of shrinkage with the shrinkage percentage ranging from 1.5 to 5%.

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Printing of Titanium implant prototype

Cited by 91 publications

References 16 publications

Fabrication of porous titanium implants by three-dimensional printing and sintering at different temperatures

Fabrication of porous titanium implants by three-dimensional printing and sintering at different temperatures

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

Characterizations of additive manufactured porous titanium implants

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