Mechanical testing of hydroxyapatite filaments for tissue scaffolds preparation by fused deposition of ceramics

Janek, M.; Žilinská, Veronika; Kovář, Vladimír; Hajdúchová, Zora; Tomanová, Katarína; Peciar, Peter; Veteška, Peter; Gabošová, Tatiana; Fialka, Roman; Feranc, Jozef; Omaníková, Leona; Plavec, Roderik; Bača, Ľuboš

doi:10.1016/j.jeurceramsoc.2020.01.061

Cited by 25 publications

(18 citation statements)

References 21 publications

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“…Foi observado que o ácido esteárico foi fundamental para o processamento, pois além de permitir e remoção do veículo orgânico (debinding). Finalmente, a etapa de sinterização sempre pode ser otimizada de acordo com sua composição química, presença de veículos orgânicos, temperatura utilizada e tempo de permanência, viabilizando um processo de obtenção de peças cada vez mais eficiente, com propriedades adequadas para cada aplicação [44].…”

Section: Resultsunclassified

Efeito do ácido esteárico em scaffolds de alumina obtidos por manufatura aditiva usando o método de fabricação por filamento fundido

et al. 2021

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Resumo As cerâmicas porosas podem ser utilizadas nas mais diversas aplicações, como na indústria petroquímica e na área da saúde. No entanto, é difícil produzir cerâmicas com formas complexas usando processos convencionais. Neste trabalho, diferentes termoplásticos (PEBD, ABS e PLA) foram utilizados para a extrusão de filamentos com alumina submicrométrica. Estes filamentos foram extrudados com e sem ácido esteárico que, posteriormente, foram utilizados na manufatura aditiva para a impressão de estruturas porosas (scaffolds) pelo método de fabricação por filamento fundido. Foram obtidas imagens por microscopia eletrônica de varredura das amostras com e sem o ácido esteárico, antes e após a sinterização. Estas imagens mostraram que a presença do ácido esteárico reduziu a formação de defeitos, pois além de atuar como dispersante também facilitou a posterior remoção do veículo orgânico do scaffold, antes da sinterização final.

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Section: Resultsunclassified

Efeito do ácido esteárico em scaffolds de alumina obtidos por manufatura aditiva usando o método de fabricação por filamento fundido

et al. 2021

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“…[184] Another important variable in buckling phenomena is the slenderness ratio, which, for a given filament diameter, is defined by the unsupported length of the sample, that is, by the distance of the sample grips in compression tests. [184] In this regard, Janek et al [188] recently compared the compressive behavior of several filaments as measured under varying test conditions. It was demonstrated that, regardless of the composition of the filament (including two different polyvinyl alcohol (PVA) filaments loaded with 50 wt% of hydroxyapatite and a commercial PLA filament loaded with about 27 wt% of gypsum), the compressive strength drastically decreased when the nominal distance of the sample grips was increased from 16 to 36 mm and then up to 76 mm.…”

Section: From the Feeding Mechanism To The Liquefier Entrancementioning

confidence: 99%

“…With the filament diameter being constant, the increasing gripping distance resulted in a longer unsupported length and, ultimately, in a higher slenderness ratio, which induced a stronger tendency to Euler buckling. [ 188 ]…”

Section: Feeding and Flowing Through The Hot‐endmentioning

confidence: 99%

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Materials Requirements in Fused Filament Fabrication: A Framework for the Design of Next‐Generation 3D Printable Thermoplastics and Composites

Sola

2022

Macro Materials & Eng

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Fused filament fabrication (FFF), also known as fused deposition modeling, is the leading technology for polymer-based additive manufacturing. The simplicity, along with the cleanness, the affordability, and the multi-material capability, are some of the main advantages that have prompted this success. Nonetheless, the uptake of FFF in industry is hampered by the limited functionality of commercial filaments, that are often based on plain thermoplastics. The future growth of FFF into new markets needs a significant improvement of available materials. However, materials requirements in FFF are complicated and often mutually conflicting. Whereas heuristic approaches to materials design imply significant costs in terms of time, energy, and materials, a critical survey of the main requirements that a new material should fulfill in order to be printable and suitable for commercial adoption is still missing. In order to bridge this gap, the present paper analyzes the workflow from filament production to end-of-life disposal of printed objects, and, for each step, brings to light the governing materials properties. Wherever possible, practical guidelines are given on acceptable values. Existing lacks of knowledge are identified to direct future studies. The ultimate goal is to provide a road map to making materials development in FFF more efficient.

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“…FDM requires materials that can be processed into polymer filaments with a high enough viscosity to build and a low enough viscosity to extrude . FDM also has an indirect printing method for ceramics, namely, fused deposition of ceramics (FDC) . Indirect printing increases the types of materials that can be used for SLA/DLP/FDM to a certain extent, but the current applications in dental implants are still relatively limited and need to be supported by more clinical experiments.…”

Section: Am Technologiesmentioning

confidence: 99%

Success Factors of Additive Manufactured Root Analogue Implants

Liu

Wang

Wei

et al. 2022

ACS Biomater. Sci. Eng.

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Dental implantation is an effective method for the treatment of loose teeth, but the threaded dental implants used in the clinic cannot match with the tooth extraction socket. A root analogue implant (RAI) has the congruence shape, which reduces the damage to bone and soft tissue. Additive manufacturing (AM) technologies have the advantages of high precision, flexibility, and easy operation, becoming the main manufacturing method of RAI in basic research. The purpose of this systematic review is to summarize AM technologies used for RAI manufacturing as well as the factors affecting successful implantation. First, it introduces the AM technologies according to different operating principles and summarizes the advantages and disadvantages of each method. Then the influences of materials, structure design, surface characteristics, implant site, and positioning are discussed, providing reference for designers and dentists. Finally, it addresses the gap between basic research and clinical application for additive manufactured RAIs and discusses the current challenges and future research directions for this field.

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Mechanical testing of hydroxyapatite filaments for tissue scaffolds preparation by fused deposition of ceramics

Cited by 25 publications

References 21 publications

Efeito do ácido esteárico em scaffolds de alumina obtidos por manufatura aditiva usando o método de fabricação por filamento fundido

Efeito do ácido esteárico em scaffolds de alumina obtidos por manufatura aditiva usando o método de fabricação por filamento fundido

Materials Requirements in Fused Filament Fabrication: A Framework for the Design of Next‐Generation 3D Printable Thermoplastics and Composites

Success Factors of Additive Manufactured Root Analogue Implants

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