Integration of Gas-Permeable Structures in Laser Additive Manufactured Products

Srivatsan, T. S.; Sudarshan, T. S.

doi:10.1201/b19360-15

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…difficult to produce using conventional manufacturing technologies (Iqbal et al 2019). Additive technology is the ideal technique to produce these plates, not only due to the ability to produce very complex shapes, but also due to the fact that the use of additive manufacturing allows to reduce material waste, part fabrication without the use of complex tooling, being the ideal technology for mass personalisation (Parthasarathy 2015;Murr 2016). For metal fixation plates, the ideal additive manufacturing technologies are selective laser melting (SLM) and electron beam melting (EBM) (Calignano et al 2019;Yuan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Stress analysis in a bone fracture fixed with topology-optimised plates

Al-Tamimi

Quental

Folgado

et al. 2019

Biomech Model Mechanobiol

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The design of commercially available fixation plates and the materials used for their fabrication lead to the plates being stiffer than bone. Consequently, commercial plates are prone to induce bone stress shielding. In this study, three-dimensional fixation plates are designed using topology optimisation aiming to reduce the risk of bone stress shielding. Fixation plate designs were optimised by minimising the strain energy for three levels of volume reduction (i.e. 25%, 45% and 75%). To evaluate stress shielding, changes in bone stress due to the different fixation plate designs were determined on the fracture plane of an idealised shaft of a long bone under a four-point bending load considering the effect of a patient walking with crutches of a transverse fractured tibia. Topology optimisation is a viable approach to design less stiff plates with adequate mechanical strength considering high volume reductions, which consequently increased the stress transferred to the bone fracture plane minimising bone stress shielding. 4 Manchester University NHS Foundation Trust, Manchester, UK Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Introductionmentioning

confidence: 99%

Stress analysis in a bone fracture fixed with topology-optimised plates

Al-Tamimi

Quental

Folgado

et al. 2019

Biomech Model Mechanobiol

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Additively manufactured titanium alloys and effect of hydroxyapatite coating for biomedical applications: A review

Jaafar

Zainol

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Metallic implants are extensively used to treat a spectrum of orthopaedic related disorders. Among the metals, titanium and its alloys are considered most excellent and indispensable material for the production of orthopaedic implants regarding their sterling mechanical properties and exceptional biocompatibility. Recently, rapid progress in developing non-toxic titanium-based alloys with modulus similar to that of human bone has inspired researchers globally. Thus, many studies have focused on titanium alloys, their heat treatment processes and several processing technologies. Additive manufacturing has been designed to enhance their mechanical properties tailored towards biomedical applications. Inarguably, the need to further improve on the implant’s biocompatibility with bodily environment for optimum service life is of great importance. Hence, hydroxyapatite coating provides an improvement as demonstrated by in vitro as well as in vivo studies. The present article critically reviews, based on recent scientific literatures, the progress made thus far in the development of titanium-based alloys, additive manufacturing processes and their heat and surface treatments tailored towards biomedical applications.

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Additive manufacturing of titanium alloys in the biomedical field: processes, properties and applications

Trevisan

Calignano

Aversa

et al. 2017

Journal of Applied Biomaterials & Functional Materials

168

117

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The mechanical properties and biocompatibility of titanium alloy medical devices and implants produced by additive manufacturing (AM) technologies - in particular, selective laser melting (SLM), electron beam melting (EBM) and laser metal deposition (LMD) - have been investigated by several researchers demonstrating how these innovative processes are able to fulfil medical requirements for clinical applications. This work reviews the advantages given by these technologies, which include the possibility to create porous complex structures to improve osseointegration and mechanical properties (best match with the modulus of elasticity of local bone), to lower processing costs, to produce custom-made implants according to the data for the patient acquired via computed tomography and to reduce waste.

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Integration of Gas-Permeable Structures in Laser Additive Manufactured Products

Cited by 3 publications

References 15 publications

Stress analysis in a bone fracture fixed with topology-optimised plates

Stress analysis in a bone fracture fixed with topology-optimised plates

Additively manufactured titanium alloys and effect of hydroxyapatite coating for biomedical applications: A review

Additive manufacturing of titanium alloys in the biomedical field: processes, properties and applications

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