An investigation into the flexural characteristics of functionally graded cobalt chrome femoral stems manufactured using selective laser melting

Hazlehurst, Kevin Brian; Wang, Changjiang; Stanford, Mark

doi:10.1016/j.matdes.2014.03.068

Cited by 91 publications

(48 citation statements)

References 15 publications

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“…Likewise, Arabnejad et al have conducted an in vitro analysis of a fully porous three‐dimensional (3D) printed stem to fulfill the requirement of bone ingrowth and offer reduced stress shielding on the femur. Hazlehurst et al studied a fully porous CoCr stem and its dense replica. The study has shown that functionally graded porous stems have reduced the weight by 48% and stiffness by 60%.…”

Section: Introductionmentioning

confidence: 99%

Finite element study of functionally graded porous femoral stems incorporating body‐centered cubic structure

et al. 2019

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The mismatch between stiffness of the femoral dense stem and host bone causes complications to patients, such as aseptic loosening and bone resorption. Three‐dimensional finite‐element models of homogeneous porous (HGP) and functionally graded porous (FGP) stems incorporating body‐centered cubic (BCC) structures are proposed in this article as an alternative to the dense stems. The relationship between the porosity and strut thickness of the BCC structure was developed to construct the finite‐element models. Three levels of porosities (20%, 50%, and 80%) were modeled in HGP and FGP stems. The porosity of the stems was decreased distally according to the sigmoid function (n = 0.1, n = 1 and n = 10) with 3 grading exponents. The results showed that FGP stems transferred 120%‐170% higher stresses to the femur (Gruen zone 7) as compared to the solid stem. Conversely, the stresses in HGP and FGP stems were 12%‐34% lower than the dense stem. The highest micromotions (105‐147 µm) were observed for stems of 80% overall porosity, and the lowest (42‐46 µm) was for stems of 20% overall porosity. Finally, FGP stems with a grading exponent of n = 10 resulted in an 11%‐28% reduction in micromotions.

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Section: Introductionmentioning

confidence: 99%

Finite element study of functionally graded porous femoral stems incorporating body‐centered cubic structure

et al. 2019

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“…By repeating this process a number of times a solid 3D object of intended shape could be fabricated [4]. Previous works in recent years have demonstrated the feasibility of using this method to build 3D part from a range of metal powders, including pure iron [5], stainless steel [6][7][8], hard tool steel [9,10], titanium alloys [11][12][13][14][15], nickel-base superalloys [4,[16][17][18], cobalt-chromium alloys [19][20][21], copper compounds [22][23][24], aluminum alloys [15,[25][26][27], refractory metals [28][29][30][31], metal matrix composites (MMCs) [2,[32][33][34][35], and even dissimilar metals (functionally gradient materials) [36,37]. Glass [38,39] and metal glass [40][41][42], quasicrystals [43] are also reported as potential SLM materials in this year.…”

Section: Introductionmentioning

confidence: 99%

Textures formed in a CoCrMo alloy by selective laser melting

Zhou

Zhang

et al. 2015

Journal of Alloys and Compounds

252

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“…The mechanical properties of scaffolds with various porosities [102] and even some functionally graded implants have been studied [137,138]. However, a universal methodology for the design of functionally graded BTE scaffolds and automated optimization procedures have not yet been developed.…”

Section: Priority Areas Of Further Researchmentioning

confidence: 99%

Additively Manufactured Scaffolds for Bone Tissue Engineering and the Prediction of their Mechanical Behavior: A Review

2017

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Additive manufacturing (AM), nowadays commonly known as 3D printing, is a revolutionary materials processing technology, particularly suitable for the production of low-volume parts with high shape complexities and often with multiple functions. As such, it holds great promise for the fabrication of patient-specific implants. In recent years, remarkable progress has been made in implementing AM in the bio-fabrication field. This paper presents an overview on the state-of-the-art AM technology for bone tissue engineering (BTE) scaffolds, with a particular focus on the AM scaffolds made of metallic biomaterials. It starts with a brief description of architecture design strategies to meet the biological and mechanical property requirements of scaffolds. Then, it summarizes the working principles, advantages and limitations of each of AM methods suitable for creating porous structures and manufacturing scaffolds from powdered materials. It elaborates on the finite-element (FE) analysis applied to predict the mechanical behavior of AM scaffolds, as well as the effect of the architectural design of porous structure on its mechanical properties. The review ends up with the authors’ view on the current challenges and further research directions.

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An investigation into the flexural characteristics of functionally graded cobalt chrome femoral stems manufactured using selective laser melting

Cited by 91 publications

References 15 publications

Finite element study of functionally graded porous femoral stems incorporating body‐centered cubic structure

Finite element study of functionally graded porous femoral stems incorporating body‐centered cubic structure

Textures formed in a CoCrMo alloy by selective laser melting

Additively Manufactured Scaffolds for Bone Tissue Engineering and the Prediction of their Mechanical Behavior: A Review

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