Page 401 - IJB-10-4

International Journal of Bioprinting Design of biofixed metamaterial bone plates and fillers

Figure 3. Transition of porous structures on different surfaces: (a) Boolean operation fusion; (b) Implicit surface fusion.

porous structure fused by the Boolean operation and porous structure fused by the implicit surface fusion
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implicit surface fusion method was 9.27e and 8.71e 5 method were not apparent.
MPa, respectively. The mixed-porous structure (iii) Compressive performance of the mixed-porous
fused by the implicit surface fusion method had structure: The compressive performance was
a lower stress concentration and relatively higher evaluated by compression simulation. The other
durability. Likewise, the stress distribution of the parameters were similar to those of the tensile
mixed-porous structure fused by the two methods simulation. The compression simulation results
was relatively uniform, and the stress concentration of the mixed-porous structures are displayed in
was slightly more significant in the longitudinal Figure 5. From the stress cloud maps at a pressure
direction than in the transverse direction. At the of 20 N (Figure 5a), the maximum stress of the
contact interface, the mixed-porous structure fused porous structure fused by the implicit surface fusion
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by the Boolean operation displayed evident stress was 5.03e MPa, which was higher than the stress
concentration, while the distribution of the mixed- concentration of the individual diamond and Split P
porous structure fused by the implicit surface fusion structures. This finding could be associated with the
method was relatively uniform. This finding could indication that the diamond structure filled the larger
be associated with the better interface fusion of the voids created by the Split P structure. Additionally,
implicit surface fusion method, facilitating stress there was no significant stress concentration at the
transfer from the mixed structure. The displacement contact interface of the mixed-porous structure
cloud maps (Figure 4b and d) revealed that the fused by the implicit surface fusion method. The
maximum displacement of the mixed-porous stress was significantly more concentrated on
the Split P structure than the diamond structure,
structure fused by the Boolean operation and the suggesting that the Split P structure could be used
implicit surface fusion method was 8.46e and 8.44e - for stimulating bone tissue growth. The displacement
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6 mm, respectively. The different fusion methods cloud maps (Figure 5b) revealed that the maximum
displayed a cumulative displacement effect from top displacement of the mixed-porous structure was
to bottom of the mixed-porous structure. However, 1.32e mm, which was significantly higher than that
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the implicit surface fusion method was relatively of the individual diamond structure and lower than
better in terms of the displacement transfer effect. that of the individual Split P structure. There was a
The mixed-porous structure fused by the Boolean cumulative displacement effect from the top to the
operation had evident gaps at the contact interface, bottom of the mixed-porous structure. Nonetheless,
while the gaps at the contact interface of the mixed- the implicit surface fusion method displayed a good

Volume 10 Issue 4 (2024) 393 doi: 10.36922/ijb.2388