Compressive behavior of SLA open-cell lattices: A comparison between triply periodic minimal surface gyroid and stochastic structures for artificial bone

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Miguel Araya , Josué Murillo , Rafael Vindas , Teodolito Guillén
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Abstract

This study evaluates the compressive properties of stereolithography (SLA) fabricated open-cell lattices, specifically triply periodic minimal surface (TPMS) gyroid and stochastic structures, for artificial bone applications. Two resins, Standard White and BioMed Amber, were tested across four relative densities (0.2, 0.3, 0.4, 0.5). Mechanical characterization of horse tuber coxae trabecular bone used as a biological comparator showed an average elastic modulus of 0.05 GPa and a yield strength of 3.369 MPa. Gyroid structures exhibited higher elastic modulus and yield strengths, with BioMed Amber gyroid at a density of 0.5, achieving an elastic modulus of 0.623 GPa and yield strength of 14.149 MPa. Stochastic structures showed lower and more variable mechanical properties. The highest yield strength for stochastic structures was observed in BioMed Amber at a density of 0.5 (14.199 MPa). Comparative analysis indicated that high-performing synthetic structures approach the lower bounds of natural bone properties. Using a field-driven design approach, variable relative density structures were developed to emulate the mechanical properties of natural bone. SEM analysis provided insights into failure mechanisms, highlighting the impact of relative density on structural integrity and material ductility. This research supports the development of 3D-printed bone-like structures as viable substitutes for cadaveric specimens in preclinical tests, with implications for material science and orthopedic applications.

Abstract Image

SLA 开孔晶格的压缩行为:用于人工骨骼的三周期性最小表面陀螺结构与随机结构的比较
本研究评估了立体光刻(SLA)制造的开孔晶格的抗压性能,特别是三重周期性最小表面(TPMS)陀螺和随机结构在人工骨应用中的抗压性能。在四种相对密度(0.2、0.3、0.4、0.5)下对两种树脂(标准白树脂和 BioMed Amber 树脂)进行了测试。作为生物参照物的马块茎骨小梁的力学特征显示,其平均弹性模量为 0.05 GPa,屈服强度为 3.369 MPa。陀螺结构显示出更高的弹性模量和屈服强度,密度为 0.5 的 BioMed Amber 陀螺结构的弹性模量为 0.623 GPa,屈服强度为 14.149 MPa。随机结构显示出更低和更多变的机械性能。随机结构的最高屈服强度出现在密度为 0.5 的 BioMed Amber 中(14.199 兆帕)。对比分析表明,高性能合成结构接近天然骨骼性能的下限。利用现场驱动的设计方法,开发出了可变相对密度结构,以模拟天然骨骼的机械性能。扫描电子显微镜分析深入揭示了失效机制,突出了相对密度对结构完整性和材料延展性的影响。这项研究支持开发三维打印类骨结构,作为临床前测试中尸体标本的可行替代品,对材料科学和整形外科应用具有重要意义。
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来源期刊
Materialia
Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
6.40
自引率
2.90%
发文量
345
审稿时长
36 days
期刊介绍: Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).
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