Effect of layer printing delay on mechanical properties and dimensional accuracy of 3D printed porous prototypes in bone tissue engineering

摘要: Abstract Recent advancements in computational design and additive manufacturing have enabled the fabrication of 3D prototypes with controlled architecture resembling natural bone. Powder-based three-dimensional printing (3DP) is a versatile method for production synthetic scaffolds using sequential layering process. The quality printed products by this optimal build parameters. In study, Calcium Sulfate based powders were used porous fabrication. X -direction pore size 0.8 mm layer thickness 0.1125 mm subjected to depowdering step. effects four delays 50, 100, 300 500 ms on physical mechanical properties investigated. compressive strength, toughness tangent modulus samples delay 300 ms observed be higher than other samples. Furthermore, results SEM μCT analyses showed that dimensional accuracy are significantly closer CAD software designs predefined macro-pore 0.6 mm strut size.