Page 305 - IJB-9-4

International Journal of Bioprinting Design and biomechanical analysis of porous tantalum prostheses

Table 2. Maximum von Mises stress and node displacement of the prostheses and tibia at a single-leg standing posture
Sample Maximum von Mises stress (MPa) Maximum displacement (mm) Maximum strain
Prostheses Tibia Prostheses Tibia of tibia (με)
300/1200 24.56 69.64 0.11890 0.04871 3482.0
450/900 26.67 54.87 0.06250 0.04523 2743.5
450/1200 25.85 60.20 0.07526 0.04651 3010.0
450/1500 25.82 60.43 0.07594 0.04656 3021.5
600/900 26.87 53.65 0.06025 0.04493 2682.5
600/1200 26.57 55.53 0.06381 0.04539 2776.5
600/1500 26.22 57.72 0.06865 0.04592 2886.0

Table 3. Maximum von Mises stress and node displacement of the prostheses and tibia at a two-leg standing posture
Sample Maximum von Mises stress (MPa) Maximum displacement (mm) Maximum strain
Prostheses Tibia Prostheses Tibia of tibia (με)
300/1200 12.28 34.82 0.05946 0.02435 1741.0
450/900 13.34 27.44 0.03125 0.02262 1372.0
450/1200 12.93 30.10 0.03763 0.02326 1505.0
450/1500 12.91 30.22 0.03797 0.02328 1511.0
600/900 13.44 26.82 0.03012 0.02247 1341.0
600/1200 13.28 27.77 0.03190 0.02270 1388.5
600/1500 13.11 28.86 0.03432 0.02296 1443.0

Figure 7. Comparison of the yield strength and the maximum von Mises stress of the prostheses at a single-leg (a) and two-leg (b) standing posture.

of all the prostheses and tibia were less than 0.06 mm. Figure 7. It was noted that, with single-leg standing posture,
Comparison of the maximum von Mises stress indicated the maximum von Mises stress of the prosthesis 300/1200
that the tibia always had a higher maximum von Mises exceeded its yield strength, suggesting that the prosthesis
stress than the corresponding prosthesis (Tables 2 and 3). 300/1200 is too weak to be eligible for the revision surgery.
To indicate the potential of the porous tantalum prostheses
to resist the mechanical loading from the patient weight and 4. Discussion
standing postures, the yield strength and the maximum von It is well known that artificial knee arthroplasty is an effective
Mises stress of the prostheses are listed and compared in orthopedic surgery for the treatment of the end-stage knee

Volume 9 Issue 4 (2023) 297 https://doi.org/10.18063/ijb.735