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Publication
Comparação da produção de uma ortótese através de processos de Estereolitografia (SLA), Processamento de Luz Digital (DLP) e MultiJet Printing (MJP)
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Authors
Abstract(s)
O fabrico aditivo, atualmente, encontra-se bastante presente na área médica, utilizado para produzir dispositivos médicos como implantes, próteses e ortóteses. No âmbito das ortóteses, a produção personalizada é promissora pois poderá melhorar a qualidade de vida das pessoas e reduzir desconforto, para além de que as tecnologias de impressão 3D a baixo custo permitem melhorar a estética e a forma de utilização. Estas tecnologias são utilizadas na fase do processo de criação das ortóteses. Numa primeira fase é utilizada o processo de engenharia inversa de forma a digitalizar o segmento corporal, o antebraço e utilizam-se softwares de modelação 3D para processar a superfície. Por fim, o modelo é impresso através das tecnologias pretendidas.
Este trabalho baseia-se na comparação de três tecnologias de impressão para o fabrico de uma ortótese de pulso, Estereolitografia, Processamento de Luz Digital e Multijet Printing. Para tal, foi desenvolvido um modelo 3D de referência e selecionados diferentes materiais de impressão, avaliados quanto a parâmetros técnicos e práticos como custos de produção, propriedades mecânicas, disponibilidade e adequação a aplicações médicas.
Os resultados obtidos pela ferramenta multicritério AHP mostram que a tecnologia vencedora é o DLP, por apresentar melhor equilíbrio entre qualidade de impressão e desempenho mecânico. O PRO-BLK 10 destacou-se no cenário sem necessidade de biocompatibilidade, o Rigid White adequou-se no cenário com biocompatibilidade, garantindo segurança clínica. Por simulações estruturais no SolidWorks Simulation, a espessura de 3.25mm revelou-se mais eficiente para a produção da ortótese.
Additive manufacturing is currently widely present in the medical field, being used to produce medical devices such as implants, prostheses, and orthoses. In the context of orthoses, personalized production is promising, as it may improve people’s quality of life and reduce discomfort. Additionally, low-cost 3D printing technologies make it possible to enhance aesthetics and usability. These technologies are used during the orthosis design process. First, reverse engineering is applied to digitize the body segment—in this case, the forearm—and 3D modeling software is used to process the surface. Finally, the model is printed using the selected technologies. This work is based on the comparison of three printing technologies for the manufacture of a wrist orthosis: Stereolithography, Digital Light Processing, and MultiJet Printing. For this purpose, a reference 3D model was developed and different printing materials were selected and evaluated according to technical and practical parameters such as production costs, mechanical properties, availability, and suitability for medical applications. The results obtained with the AHP multi-criteria method show that the winning technology is DLP, as it presents the best balance between printing quality and mechanical performance. PRO-BLK 10 stood out in the scenario without biocompatibility requirements, while Rigid White proved suitable in the biocompatible scenario, ensuring clinical safety. According to structural simulations performed in SolidWorks Simulation, the 3.25 mm thickness was shown to be the most efficient for manufacturing the orthosis
Additive manufacturing is currently widely present in the medical field, being used to produce medical devices such as implants, prostheses, and orthoses. In the context of orthoses, personalized production is promising, as it may improve people’s quality of life and reduce discomfort. Additionally, low-cost 3D printing technologies make it possible to enhance aesthetics and usability. These technologies are used during the orthosis design process. First, reverse engineering is applied to digitize the body segment—in this case, the forearm—and 3D modeling software is used to process the surface. Finally, the model is printed using the selected technologies. This work is based on the comparison of three printing technologies for the manufacture of a wrist orthosis: Stereolithography, Digital Light Processing, and MultiJet Printing. For this purpose, a reference 3D model was developed and different printing materials were selected and evaluated according to technical and practical parameters such as production costs, mechanical properties, availability, and suitability for medical applications. The results obtained with the AHP multi-criteria method show that the winning technology is DLP, as it presents the best balance between printing quality and mechanical performance. PRO-BLK 10 stood out in the scenario without biocompatibility requirements, while Rigid White proved suitable in the biocompatible scenario, ensuring clinical safety. According to structural simulations performed in SolidWorks Simulation, the 3.25 mm thickness was shown to be the most efficient for manufacturing the orthosis
Description
Keywords
Ortótese Custmização Estereolitografia Processamento de luz digital MultiJet printing