COMPARISON OF THE POROSITY OF SCAFFOLDS MANUFACTURED BY TWO ADDITIVE MANUFACTURING TECHNOLOGIES: SLA AND FDM

Bernardo Vieira Magaldi (1) , Marianna de Oliveira da Costa (1) , Rossana Mara da Silva Thiré (1) , Anna Carla Araujo (1)

1 UFRJ - Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil]

Scaffolds are 3D-porous biomaterials used for tissue engineering. Their physical, chemical and biological properties are strongly dependent upon the fabrication process. Additive Manufacturing (AM) is a fabrication process for serial production of complex structures designed by virtual models and based on the addition of layers. Fused Deposition Modeling (FDM) produces each layer by heating-extrusion of polymer/composite filament. The raw material used in Stereolithography (SLA) is a liquid resin that is transformed to the solid state by the photopolymerization process. The objective of this work is to evaluate the structure of the scaffolds produced by the two processes: FDM and SLA. Different geometry configurations are manufactured and the volumes of workpieces are compared as quality integrity of the specimens. In spite of using different polymers for each AM process, it was observed that FDM parts presented higher porosity and lower dimensional deviation in relation to digital model than SLA parts for all geometries. However, the quality of deposited filaments was higher for SLA scaffolds.

Mots clés: Additive Manufacturing; SLA; FDM; Scaffolds; Porosity

Domaines: Mécanique [physics.med-ph]

Bernardo Vieira Magaldi, Marianna de Oliveira da Costa, Rossana Mara da Silva Thiré, Anna Carla Araujo. COMPARISON OF THE POROSITY OF SCAFFOLDS MANUFACTURED BY TWO ADDITIVE MANUFACTURING TECHNOLOGIES: SLA AND FDM. 24th International Congress of Mechanical Engineering, 2018, Curitiba, Brazil. ⟨hal-03226784⟩