Study of the influence of raster angle on the mechanical properties of 3D printed Polycaprolactone / 45S5 Bioglass® scaffolds

Introduction & Objectives: Fabrication of bone tissue engineering scaffolds due to its high sensitivity to physicochemical properties including mechanical properties has always been controversial. Since the mechanical strength of the scaffold is directly related to its geometry of pores, suitable porosity geometry is needed in the manufacture of a scaffold with mechanical properties similar to natural bone.Materials & Methods: In the present study, 3D printing was employed to fabricate Polycaprolactone (PCL) / 45S5 Bioglass® (BG) scaffolds. After 3D printing of PCL/BG with three different angles of 0°/90°, 0°/60°/120°, and 0°/45°/90°/135°, the influence of raster angle on mechanical properties, namely Ultimate Tensile Strength, Yield Strength and Modulus of Elasticity were determined.Results: It was found that the raster angle is an important parameter that significantly affected the mechanical properties of the specimens. The results showed that scaffolds with raster angles of 0°/90° presented the highest compressive strength and modulus of elasticity.Conclusion: This study evaluated the effect of additive manufactured scaffold geometry on mechanical properties. It focused on the orientation of the printed strands. The results of this study demonstrate how we can control the mechanical properties of 3D printed scaffolds by changing the raster angle.

کلیدواژه ها:

3D Bioprinting ، Bone tissue engineering ، Polycaprolactone / 45S5 Bioglass® ، Raster angle