Page 133 - IJB-9-2

International Journal of Bioprinting Design and manufacture of high-performance bone plate

Figure 8. Assembly of biological fixed bone plate and opening of screw holes.

Figure 9. Data processing of SLM-molded bone plate. (A) Processing risk analysis. (B) Placement and support addition.

3.6. 3D Printing molding process of the biological In order to understand the processing risks of the
fixation plate biological fixation plate, the processing risks were analyzed
3.6.1. Data processing of the 3D-printed biological using Magics software, which revealed that the processing
fixation plate risks of the biological fixation plate mainly occurred at both
Different placement and support addition modes of ends (Figure 9A). No processing risks were detected in
3D-printed parts result in further support additions and other parts, implying that the addition of support was able
molded layer thickness of parts; these differences directly to satisfy the processing requirements. Since dendriform
affect the molding quality and molding efficiency of parts. supports have high strength, little support addition, and
When processing the host bone using fused deposition small stress concentration, they can be added to the plate
modeling (FDM) technology, the host bone and substrate that has undergone processing risk analysis. The results of
were placed at an inclination of 10° to promote processing support addition are shown in Figure 9B. We found that
efficiency and avoid a long scanning line. Given the large the support addition of the plate was concentrated in non-
processing section, the preheating temperature of the key parts where the support can be easily removed. The
substrate was raised appropriately, and a 25% support small support addition and powder waste conformed to
was added to reduce stress concentration and prevent the support addition principle of SLM-molded parts.
warpage and deformation. For metal biological fixation
plates, according to findings on the placement and support 3.6.2. Performance of the SLM-molded biological
addition modes of SLM-molded parts , the plate was fixation plates
[15]
tilted 45° relative to the datum plane to prevent stress The SLM-molded biological fixation plate is shown in
concentration induced by a long scanning line of the Figure 10. The overall morphology of the plate (Figure 10B)
plate and avoid adding support to the inside of the porous showed that the surface of the plate was bright and new,
structure of the plate. the pore structure was clear, and the metal feel was good.

Volume 9 Issue 2 (2023) 125 https://doi.org/10.18063/ijb.v9i2.658