High-Performance Self-Expanding NiTi Stents Manufactured by Laser Powder Bed Fusion

Li, Xiang; Hao, Shijie; Du, Baopeng; Bao, Feng; Li, Haohang; Qiu, Ping; Huang, Bingmin; Cui, Lishan; Yang, Ying

doi:10.1007/s12540-022-01317-2

Cited by 10 publications

(2 citation statements)

References 44 publications

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“…Recent investigations into metal biomaterials have progressively shifted their focus towards innovative reconstructive procedures for hard tissues and organs. Examples include the application of nickel-titanium (NiTi) shape memory alloy in vascular stents and [ [4] , [5] , [6] , [7] , [8] ], and the exploration of novel magnesium (Mg)-based alloys for advancements in bone tissue engineering and regeneration [ [9] , [10] , [11] , [12] , [13] , [14] ]. The design and selection of metallic implants depend on their specific medical applications.…”

Section: Introductionmentioning

confidence: 99%

Surface engineering of pure magnesium in medical implant applications

Gong,

Yang,

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Surface engineering of pure magnesium in medical implant applications

Gong,

Yang,

et al. 2024

Heliyon

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“…Li et al [21] applied electrochemical polishing in acid solution for as-printed NiTi stents with a reduction of surface roughness. These results demonstrated that a fundamental study of SLM and the posttreatment chain of NiTi stents is required.…”

Section: Introductionmentioning

confidence: 99%

Surface characteristics of NiTi cardiovascular stents by selective laser melting

Zhang,

Li,

et al. 2023

Preprint

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Selective laser melting (SLM) has gained great attention to manufacture cardiovascular stents given its potential of fabricating customized stents with complex shapes to satisfy clinical requirements. In this study, the surface characteristics of NiTi cardiovascular stents by SLM were explored. The effect of SLM machining parameters on surface morphology, geometry accuracy, phase composition, surface roughness and contact angle were analyzed. The results demonstrated that the surface morphology of stent became more irregular and the surface roughness was enhanced accompanied by the volume energy density (VED) increased. SLMed stents exhibited hydrophobic properties, and the rougher surface obtained a lower contact angle. The deviation of strut thickness was more than 200% than the nominal value under 194 J/mm3. The lowest VED displayed strong cubic B2 structure with less content loss of Ni, satisfying the self-expand NiTi stent requirements. Then electrochemical polishing (ECP) process distinctly improved the surface quality, providing smoother surfaces. The surface roughness reduced minimum to 0.45 µm from 6.64 µm for SLMed stent, and the average strut thickness was reduced to 230 µm at most. Finally, electrochemical test results revealed that SLM-ECPed stents showed a more obvious tendency to resist corrosion compared to SLMed stents.

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Surface characteristics of NiTi cardiovascular stents by selective laser melting and electrochemical polishing

Zhang,

Li,

et al. 2023

Int J Adv Manuf Technol

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High-Performance Self-Expanding NiTi Stents Manufactured by Laser Powder Bed Fusion

Cited by 10 publications

References 44 publications

Surface engineering of pure magnesium in medical implant applications

Surface engineering of pure magnesium in medical implant applications

Surface characteristics of NiTi cardiovascular stents by selective laser melting

Surface characteristics of NiTi cardiovascular stents by selective laser melting and electrochemical polishing

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