Page 397 - IJB-10-4

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

1–2 times the width (H = W or 2W ) or diameter (H = D In this study, the femoral prosthesis after osteotomy
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or 2D ). The dimensions of the modeled porous structure was printed using the Z-603S industrial high-precision
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were: length: 10 mm; width: 10 mm; height: 12 mm; unit desktop 3D printer (Aurora Volvo Co., Ltd., China). The
size: 3 mm; and thickness: 0.25 mm. Table 1 displays the molding material was polylactic acid (PLA); the printing
parameters of the designed porous structures. layer thickness was 0.15 mm; the filling density was 20%.
The material for the bone plate and filler mold was 316L
2.2. Bone plate production stainless steel powder (Sandvik Osprey Limited, United
The femoral prosthesis after osteotomy can be printed Kingdom). The elemental composition of the 316L stainless
using a plastic 3D printer, and the bone plate and filler steel powder was compliant with the ASTM A276 standard
can be printed using a metal 3D printer. This approach (Table 2). The particle size distribution of 316L stainless
retains the biocompatibility and reduces the overall costs. steel powder was narrow and concentrated, i.e., 90% of
Table 1. Design parameters and shapes of the porous structures
Type of porous Porosity (%) Average pore Surface area-to-volume ratio Shape
structure diameter (mm)

Diamond 80.54 1.09 2.63

Gyroid 83.71 0.89 2.14

Lidinoid 54.04 0.55 2.75

Split P 78.69 0.81 3.45

Volume 10 Issue 4 (2024) 389 doi: 10.36922/ijb.2388