Page 404 - IJB-10-4

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

Figure 7. Design of a conformal femoral plate.

Figure 8. Simulation parameter settings for the bone plate and filler: (a) load and constraint parameters, and (b) topology optimization parameters.

(ii) We added connector constraints at the fixed hole exerted by muscles and ligaments on the bone plate
positions corresponding to the interlocking plate, (e.g., compression, bending, and torsion). When
cortical bone, and cancellous bone. the femoral head is under compression, it naturally
generates both bending and torsional forces. In this
(iii) Material parameters: the elastic modulus and
Poisson’s ratio of the cortical bone were 17.00e 3 study, we considered a 70 kg adult as the research
MPa and 0.30, respectively; the elastic modulus and subject. A single-leg compression load of 2100 N
Poisson’s ratio of the cancellous bone were 5.00e 2 (approximately three times the body weight) was
MPa and 0.30, respectively; the material for the applied to the femoral head, and the part of the
interlocking plate and screw fixation holes was set femur in contact with the meniscus at the other end
to be the 316L stainless steel powder, with an elastic was set to be fixed entirely. A single compression was
modulus and Poisson’s ratio of 195.00e MPa and used as bending, and torsional forces are assumed to
3
0.29, respectively. be generated simultaneously.
(vi) The element size was set to 6 mm, and the mesh
(iv) Contact settings: We optimized a binding contact
between the cortical and cancellous bones, division was selected as automatic division.
between the filler and cortical and cancellous bones Likewise, the topological optimization parameter
(respectively), and between the screw holes and settings (Figure 8b) for the bone plate and filler were
interlocking plate. addressed as follows:
(v) The load on the femur in the human body is (i) Several simulation parameters, such as material,
complex, with multiple influencing factors such load, and constraint conditions, were fixed to mimic
as screw preload, frictional force, and the forces a solid bone plate in the model.

Volume 10 Issue 4 (2024) 396 doi: 10.36922/ijb.2388