增材制造医用骨螺钉:一项初步研究格状Voronoi结构对种植体初级稳定性的影响

IF 3.4 4区 工程技术 Q1 ENGINEERING, MECHANICAL
Chiara Bregoli, Jacopo Fiocchi, Carlo Alberto Biffi, Ausonio Tuissi
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引用次数: 1

摘要

目的研究激光粉末床融合(LPBF)工艺制备的三种Ti6Al4V ELI骨螺钉的力学性能:一种全螺纹螺钉和两组由晶格型Voronoi (LBV)结构组成的不同排列扇区分别在纵向和横向位置。本研究旨在探讨引入LBV结构的可能性,并评估其对种植体初级稳定性和力学性能的影响。设计/方法/方法采用LPBF工艺实现了优化的骨螺钉设计。通过扫描电子显微镜和显微计算机断层扫描评估标本的质量和完整性。通过在标准聚氨酯泡沫块中插入和取出螺钉,实验验证了初级稳定性。最后,进行了扭转试验,比较和评价了不同设计的机械强度。LBV结构的引入降低了种植体的弹性模量。与全螺纹螺钉相比,纵向LBV型螺钉具有最低的插入扭矩(与较低的骨损伤相关),同时仍具有良好的扭转强度和拆除力。LBV结构的使用可以提高参考线程的功能性能,使晶格结构能够在生物医学领域使用。原创性/价值该论文满足了设计定制植入物的确定兴趣,该植入物具有改进的初级稳定性和有希望的次级稳定性特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Additively manufactured medical bone screws: an initial study to investigate the impact of lattice-based Voronoi structure on implant primary stability
Purpose The present study investigates the mechanical properties of three types of Ti6Al4V ELI bone screws realized using the laser powder bed fusion (LPBF) process: a fully threaded screw and two groups containing differently arranged sectors made of lattice-based Voronoi (LBV) structure in a longitudinal and transversal position, respectively. This study aims to explore the potentialities related to the introduction of LBV structure and assess its impact on the implant’s primary stability and mechanical performance. Design/methodology/approach The optimized bone screw designs were realized using the LPBF process. The quality and integrity of the specimens were assessed by scanning electron microscopy and micro-computed tomography. Primary stability was experimentally verified by the insertion and removal of the screws in standard polyurethane foam blocks. Finally, torsional tests were carried out to compare and assess the mechanical strength of the different designs. Findings The introduction of the LBV structure decreases the elastic modulus of the implant. Longitudinal LBV type screws demonstrated the lowest insertion torque (associated with lower bone damage) while still displaying promising torsional strength and removal force compared with full-thread screws. The use of LBV structure can promote improved functional performances with respect to the reference thread, enabling the use of lattice structures in the biomedical sector. Originality/value The paper fulfils an identified interest in designing customized implants with improved primary stability and promising features for secondary stability.
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来源期刊
Rapid Prototyping Journal
Rapid Prototyping Journal 工程技术-材料科学:综合
CiteScore
8.30
自引率
10.30%
发文量
137
审稿时长
4.6 months
期刊介绍: Rapid Prototyping Journal concentrates on development in a manufacturing environment but covers applications in other areas, such as medicine and construction. All papers published in this field are scattered over a wide range of international publications, none of which actually specializes in this particular discipline, this journal is a vital resource for anyone involved in additive manufacturing. It draws together important refereed papers on all aspects of AM from distinguished sources all over the world, to give a truly international perspective on this dynamic and exciting area. -Benchmarking – certification and qualification in AM- Mass customisation in AM- Design for AM- Materials aspects- Reviews of processes/applications- CAD and other software aspects- Enhancement of existing processes- Integration with design process- Management implications- New AM processes- Novel applications of AM parts- AM for tooling- Medical applications- Reverse engineering in relation to AM- Additive & Subtractive hybrid manufacturing- Industrialisation
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