Anisotropic Ti-6Al-4V gyroid scaffolds manufactured by electron beam melting (EBM) for bone implant applications

Ataee, Arash; Li, Yuncang; Fraser, Darren; Song, Guowen; Wen, Cuié

doi:10.1016/j.matdes.2017.10.040

Cited by 289 publications

(122 citation statements)

References 64 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…A possible explanation for this result may be the lower degree of isotropy in this structure, being particularly mechanically efficient along the axial direction tested. Recent research has shown that additively manufactured structures exhibit anisotropic behaviour [33], but that this difference becomes insignificant for larger unit cells, and derives from the smaller samples in that work not accurately replicating the CAD model shape -the anisotropy in property comes from differences in the porous structure, not inherent directionality in the properties of the metal from which it is made.…”

Section: Discussionmentioning

confidence: 99%

Selective laser melting processed Ti6Al4V lattices with graded porosities for dental applications

Wally

Haque

Feteira

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

106

View full text Add to dashboard Cite

Dental implants need to support good osseointegration into the surrounding bone for full functionality. Interconnected porous structures have a lower stiffness and larger surface area compared with bulk structures, and therefore are likely to enable better bone-implant fixation. In addition, grading of the porosity may enable large pores for ingrowth on the periphery of an implant and a denser core to maintain mechanical properties. However, given the small diameter of dental implants it is very challenging to achieve gradations in porosity. This paper investigates the use of Selective Laser Melting (SLM) to produce a range of titanium structures with regular and graded porosity using various CAD models. This includes a novel 'Spider Web' design and lattices built on a diamond unit cell. Well-formed interconnecting porous structures were successfully developed in a one-step process. Mechanical testing indicated that the compression stiffness of the samples was within the range for cancellous bone tissue. Characterization by scanning electron microscopy (SEM) and X-ray micro-computed tomography (μCT) indicated the designed porosities were well-replicated. The structures supported bone cell growth and deposition of bone extracellular matrix.Graphical abstract:

show abstract

Section: Discussionmentioning

confidence: 99%

Selective laser melting processed Ti6Al4V lattices with graded porosities for dental applications

Wally

Haque

Feteira

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

106

View full text Add to dashboard Cite

show abstract

“…However, dimensional inaccuracies can be better understood via a local analysis of specific lattice features, such as struts, nodes, designed pores and wall thicknesses. Struts have been observed to deviate from circular cross-sections to ellipsoidal in references [59][60][61][62]. Ataee et al [61] particularly note the effect to be strongest at the ends of the struts.…”

Section: Dimensional Inaccuraciesmentioning

confidence: 99%

“…Struts have been observed to deviate from circular cross-sections to ellipsoidal in references [59][60][61][62]. Ataee et al [61] particularly note the effect to be strongest at the ends of the struts. Arabnejad et al [59] observe ellipsoidal deviations to a greater degree in horizontal struts, due to overmelting.…”

Section: Dimensional Inaccuraciesmentioning

confidence: 99%

Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

148

View full text Add to dashboard Cite

Additively manufactured lattice structures are popular due to their desirable properties, such as high specific stiffness and high surface area, and are being explored for several applications including aerospace components, heat exchangers and biomedical implants. The complexity of lattices challenges the fabrication limits of additive manufacturing processes and thus, lattices are particularly prone to manufacturing defects. This paper presents a review of defects in lattice structures produced by powder bed fusion processes. The review focuses on the effects of lattice design on dimensional inaccuracies, surface texture and porosity. The design constraints on lattice structures are also reviewed, as these can help to discourage defect formation. Appropriate process parameters, post-processing techniques and measurement methods are also discussed. The information presented in this paper contributes towards a deeper understanding of defects in lattice structures, aiming to improve the quality and performance of future designs.

show abstract

“…(2) Lattice structure based on the implicit function surface This kind of lattice structure is usually designed by the triply periodic minimal surfaces (TPMS), which have many advantages such as unique topological shape, smooth surface, high specific surface area, low stiffness and high strength of the structure, high permeability, and is similar to the microstructure of the trabecular bone. Thus, it is introduced as an attractive candidate for the topology configuration of orthopedic implants [109][110][111]. Yoo et al [112] successfully filled minimal surface structures into clinical implants, but it was limited to structural design, without further exploration of its biological functionality.…”

Section: Lattice Structure Designmentioning

confidence: 99%

“…These works extend the minimal surface structure from modeling. The 64% porosity Ti-6Al-4V primitive lattice structures manufactured by SLM has similar mechanical properties to the cortical bone [110]. Other related researches have focused on exploring the mechanical response of the minimal structure with different porosity, especially for gyroid surfaces [110,111,115].…”

Section: Lattice Structure Designmentioning

confidence: 99%

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Bai

Cheng

Chen

et al. 2019

Metals

120

View full text Add to dashboard Cite

Metals have been used for orthopedic implants for a long time due to their excellent mechanical properties. With the rapid development of additive manufacturing (AM) technology, studying customized implants with complex microstructures for patients has become a trend of various bone defect repair. A superior customized implant should have good biocompatibility and mechanical properties matching the defect bone. To meet the performance requirements of implants, this paper introduces the biomedical metallic materials currently applied to orthopedic implants from the design to manufacture, elaborates the structure design and surface modification of the orthopedic implant. By selecting the appropriate implant material and processing method, optimizing the implant structure and modifying the surface can ensure the performance requirements of the implant. Finally, this paper discusses the future development trend of the orthopedic implant.

show abstract

Anisotropic Ti-6Al-4V gyroid scaffolds manufactured by electron beam melting (EBM) for bone implant applications

Cited by 289 publications

References 64 publications

Selective laser melting processed Ti6Al4V lattices with graded porosities for dental applications

Selective laser melting processed Ti6Al4V lattices with graded porosities for dental applications

Review of defects in lattice structures manufactured by powder bed fusion

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Contact Info

Product

Resources

About