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Publication
Desenvolvimento de dispositivos em aço inoxidável por fabrico aditivo, para aplicação ortopédica
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Abstract(s)
Com o crescente interesse na tecnologia de fabrico aditivo, a avaliação da biocompatibilidade e das propriedades mecânicas dos materiais para aplicações médicas tornou-se crucial. Este estudo teve como objetivo investigar as propriedades mecânicas e a citotoxicidade de estruturas porosas giroide, honeycomb e triangular concebidas para potenciais aplicações ortopédicas. As estruturas foram fabricadas utilizando a tecnologia de fabrico por filamento fundido de metal (FFF) a partir de um filamento BASF Ultrafuse 316L. Este estudo demonstrou a importância e o impacto do design e da densidade das peças nas propriedades mecânicas das estruturas e na sua viabilidade celular. As estruturas que combinaram as melhores propriedades mecânicas e de biocompatibilidade foram as de preenchimento baixo e sem paredes, como a giroide 35% e a honeycomb 35%. Estas estruturas apresentaram tensões de cedência e módulos de elasticidade próximos dos requisitos mecânicos para o osso cortical e mantiveram boa viabilidade celular, com menor formação de resíduos.
Abstract With the growing interest in additive manufacturing technology, assessing the biocompatibility and mechanical properties of materials for medical applications has become crucial. This study aimed to investigate the mechanical properties and cytotoxicity of gyroid, honeycomb and triangular porous structures designed for potential orthopaedic applications. The structures were manufactured using metal fused filament fabrication (FFF) technology from BASF Ultrafuse 316L filament. This study demonstrated the importance and impact of the design and density of the parts on the mechanical properties of the structures and their cell viability. The structures that combined the best mechanical properties and biocompatibility were those with low filling and no walls, such as giroid 35% without a wall and honeycomb 35% without a wall. These structures showed yield strengths and moduli of elasticity close to the mechanical requirements for cortical bone and maintained good cell viability, with less residue formation.
Abstract With the growing interest in additive manufacturing technology, assessing the biocompatibility and mechanical properties of materials for medical applications has become crucial. This study aimed to investigate the mechanical properties and cytotoxicity of gyroid, honeycomb and triangular porous structures designed for potential orthopaedic applications. The structures were manufactured using metal fused filament fabrication (FFF) technology from BASF Ultrafuse 316L filament. This study demonstrated the importance and impact of the design and density of the parts on the mechanical properties of the structures and their cell viability. The structures that combined the best mechanical properties and biocompatibility were those with low filling and no walls, such as giroid 35% without a wall and honeycomb 35% without a wall. These structures showed yield strengths and moduli of elasticity close to the mechanical requirements for cortical bone and maintained good cell viability, with less residue formation.
Description
Keywords
Fabrico aditivo Metal fff Ensaios de compressão Estruturas porosas Citotoxicidade Biocompatibilidade Implantes ortopédicos Aço inoxidável Additive manufacturing Compression tests Porous structures Cytotoxicity Biocompatibility Orthopedic implants Stainless steel