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International Journal of Bioprinting Lattice-Solid hybrid 3D printing for artificial implant

Figure 7. FEA direct analysis results for S-type hybrid structures with different fractions. (a) 10%; (b) 20%; (c) 30%; (d) 40%; (e) 50%.

Figure 8. Maximum von Mises stress with 500 N for P-type and S-type specimens.

strength exponentially depended on mesh volume fraction the long bones in the lower extremities and pelvis play a
(Figure 9b). In practical point of view, implant strength is crucial role in weight-bearing and thus, it is important to
more important than bone and tissue ingrowth. Therefore, accurately determine their volume fraction of the lattice
even if the lattice structure is used for the purpose of structure.
osseointegration or to reduce stress shielding, the fact that The fractography of the hybrid structure specimens after
the strength of the hybrid structure decreases by the cross- tensile testing is shown in Figure 10. The fractographic surface
sectional volume fraction of the lattice structure should in the solid region is divided into stage 1 with crack initiation
be taken into account in the design process. In particular, and growth (orange) and stage 2 with shear fracture (blue).

Volume 9 Issue 4 (2023) 21 https://doi.org/10.18063/ijb.716