The utility of additively manufactured β-Ti latticed hip implants in reducing femoral stress shielding: A finite element study

IF 3.3 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-04-05 DOI:10.1016/j.jmbbm.2025.106999

Peter Ibrahim , Piyapat Jameekornkul , Ajit Panesar , Moataz M. Attallah

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Abstract

Total or partial hip replacement procedures have become one of the most frequently performed surgical procedures worldwide. However, a significant and increasing percentage of these patients return for revision surgeries due to stress shielding phenomena and the following implications such as aseptic implant loosening. Various strategies are under investigation to reduce the mechanical properties gap between the implant and the femur tissues. In this study, different development aspects have been merged to improve the design of hip implants and minimise the stress shielding. A low elastic modulus β-Ti TNTZO alloy has been used as the implant material. An actively optimised lattice structure has been embedded into the implant to tune its mechanical properties according to the bone properties of the patient. The study showed that using TNTZO reduced the average stress shielding of the implant by 31 % compared to commercial CoCr implants. Moreover, with two-step TNTZO lattice optimisation, the stress shielding was fully eliminated in all the femur sections, which accelerates the healing process of the bone and extends its long-term life. The study presented a scope for further optimisation to address other objectives, such as implant stiffness and eliminating stress concentration zones.

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增材制造β-钛晶格髋关节植入物在减少股骨应力屏蔽中的应用：一项有限元研究

全髋关节或部分髋关节置换术已成为世界范围内最常用的外科手术之一。然而，由于应力屏蔽现象和以下影响，如无菌植入物松动，这些患者返回翻修手术的比例显著增加。目前正在研究各种策略，以减少植入物与股骨组织之间的机械性能差距。在这项研究中，不同的发展方面已经合并，以改善髋关节植入物的设计，并尽量减少应力屏蔽。采用低弹性模量β-Ti TNTZO合金作为植入材料。主动优化的晶格结构已嵌入到植入物中，以根据患者的骨骼特性调整其机械性能。研究表明，与商用CoCr种植体相比，使用TNTZO可将种植体的平均应力屏蔽降低31%。此外，通过两步TNTZO晶格优化，在所有股骨部分完全消除了应力屏蔽，从而加速了骨骼的愈合过程，延长了其长期寿命。该研究提出了进一步优化的范围，以解决其他目标，如植入物刚度和消除应力集中区。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.