Gyroid porous titanium structures: A versatile solution to be used as scaffolds in bone defect reconstruction

Yáñez, Alejandro J.; Cuadrado, Alberto; Fuentes, Óscar Martel; Afonso, H.; Monopoli, Donato

doi:10.1016/j.matdes.2017.11.050

Cited by 175 publications

(77 citation statements)

References 44 publications

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“…[ 111 ]:

where the x, y, and z are in the Cartesian Coordinates [ 113 ]. The α variant is the offset value, which can be used to determinate the designed solid fraction [ 31 ]. The offset value can be both positive and negative.…”

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

“…Previous studies investigated the mechanical properties of TPMS architectures [ 20 , 31 , 106 , 123 , 125 ] in which powder bed fusion fabrication methods (SLS, SLM and EBM) were employed to build up metallic TPMS structures, especially for Ti and its alloys (see Table 3 ). These AM methods address the challenges of conventional manufacturing processes, allowing the fabrication of complex, open-cellular TPMS architectures.…”

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

“…Both gyroid structures have shown a good strength-to-weight ratio for a certain angle of strut orientation and specific strength and stiffness [ 135 , 136 ]. Yanez et al [ 31 , 135 ] investigated the mechanical properties of a normal gyroid scaffold and a severally deformed gyroid scaffold with different angels (19°, 21.5°, 26°, 35°, 55°, 64° and 68.5°) in terms of compression tests, torsion tests and finite element analysis and reported that both the elastic modulus and compressive strength of the gyroid structures were reversely proportional to the strut angle at the axial direction. As the pores of normal gyroid exhibit a spherical shape, the structure possesses higher homogeneity in mechanical performance than that of the deformed gyroid.…”

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

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Additive manufacturing technology for porous metal implant applications and triple minimal surface structures: A review

Ding

Wen

2019

Bioactive Materials

425

200

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Recently, the fabrication methods of orthopedic implants and devices have been greatly developed. Additive manufacturing technology allows the production of complex structures with bio-mimicry features, and has the potential to overcome the limitations of conventional fabrication methods. This review explores open-cellular structural design for porous metal implant applications, in relation to the mechanical properties, biocompatibility, and biodegradability. Several types of additive manufacturing techniques including selective laser sintering, selective laser melting, and electron beam melting, are discussed for different applications. Additive manufacturing through powder bed fusion shows great potential for the fabrication of high-quality porous metal implants. However, the powder bed fusion technique still faces two major challenges: it is high cost and time-consuming. In addition, triply periodic minimal surface (TPMS) structures are also analyzed in this paper, targeting the design of metal implants with an enhanced biomorphic environment.

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“…[ 111 ]:

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

Section: Triply Periodic Minimal Surface (Tpms) Structuresmentioning

confidence: 99%

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Additive manufacturing technology for porous metal implant applications and triple minimal surface structures: A review

Ding

Wen

2019

Bioactive Materials

425

200

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“…It allows the description of scaffold architectures using a single mathematical equation, with the capability to introduce different pore shapes and architectural features, including pore size gradients [10].This method was used to model scaffolds based on the class of surfaces known as triply periodic minimal surfaces (TPMS). These surfaces, frequently occurring in nature, are considered very attractive for these kind of applications [11,12]. They are, mathematically, defined as surfaces with zero mean curvature at every point and periodicity in three directions mutually perpendicular [13].…”

mentioning

confidence: 99%

“…This method was used to model scaffolds based on the class of surfaces known as triply periodic minimal surfaces (TPMS). These surfaces, frequently occurring in nature, are considered very attractive for these kind of applications [11,12]. They are, mathematically, defined as surfaces with zero mean curvature at every point and periodicity in three directions mutually perpendicular [13].…”

mentioning

confidence: 99%

Porous Scaffold Design Based on Minimal Surfaces: Development and Assessment of Variable Architectures

Ambu

Morabito

2018

Symmetry

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In tissue engineering, biocompatible porous scaffolds that try to mimic the features and function of the bone are of great relevance. In this paper, an effective method for the design of 3D porous scaffolds is applied to the modelling of structures with variable architectures. These structures are of interest since they are more similar to the stochastic configuration of real bone with respect to architectures made of a unit cell replicated in three orthogonal directions, which are usually considered for this kind of applications. This property configures them as, potentially, more suitable to satisfy simultaneously the biological requirements and those relative to the mechanical strength. The procedure implemented is based on the implicit surface modelling method and the use of a triply periodic minimal surface (TPMS), specifically, the Schwarz's Primitive (P) minimal surface, whose geometry was considered for the development of scaffolds with different configurations. The representative structures modelled were numerically analysed by means of finite element analysis (FEA), considering them made of a biocompatible titanium alloy. The architectures considered were thus assessed in terms of the relationship between the geometrical configuration and the mechanical response to compression loading. taken into account. Biodegradable polymeric materials have been considered [3] to facilitate cell ingrowth due to material resorption over time along with the adequate mechanical environment provided by the structure of the scaffold. For load bearing applications investigated in this study, biocompatible metallic scaffolds are expected to fulfill the required mechanical strength. In particular, the use of titanium and its alloys, such as Ti-6Al-4V, is well reported in literature [4-6] since they have an excellent strength-to-weight ratio, toughness, and most importantly, the biocompatibility and corrosion resistance of their naturally forming surface oxide [7], making them particularly suitable for these applications.The advent of new manufacturing technologies, such as additive manufacturing (AM), has expanded the potentiality in the design of these structures since with these techniques, tailored design specification implants and highly complex and custom-fitting medical devices can be provided [8].The modelling of these structures can be conducted with different approaches. The simpler approach uses parametric Computer-Aided Design (CAD) modelling in which a unit cell is generated from solid features that are combined together. A three-dimensional (3D) periodic array of the unit cell can be carried out along three mutually perpendicular directions to obtain the final architecture. Usually, lattice-based geometries [5,6,9] such as cubic, diamond lattice, rhombic dodecahedron, or similar, are generated with this method since more complex geometries are difficult to model.Another approach, which was used in this paper, is the method of implicit surface modelling (ISM). ISM is a highly flexible approach for the generation ...

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The Properties of Parts Produced by Additive Manufacturing

CHARKALUK

2023

Additive Manufacturing of Metal Alloys 2

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Gyroid porous titanium structures: A versatile solution to be used as scaffolds in bone defect reconstruction

Cited by 175 publications

References 44 publications

Additive manufacturing technology for porous metal implant applications and triple minimal surface structures: A review

Additive manufacturing technology for porous metal implant applications and triple minimal surface structures: A review

Porous Scaffold Design Based on Minimal Surfaces: Development and Assessment of Variable Architectures

The Properties of Parts Produced by Additive Manufacturing

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