Page 279 - IJB-10-5

International Journal of Bioprinting A TPMS framework for complete dentures

Table 7. Comparison between finite element (FE) simulation and experimental results
Elastic modulus (GPa) Yield strength (MPa)
EV SV EV/SV EV SV EV/SV

A-II 8.46 14.66 (±0.7) 57.71 81.21 159 (±6.8) 51.08
A-III 10.54 18.43 (±1.1) 57.19 126.56 180 (±12.2) 70.31
B-I 20.81 30.42 (±2.2) 68.41 205.32 281 (±27.3) 73.08
C-II 9.31 17.38 (±1.4) 53.57 105.27 178 (±9.7) 59.14
C-III 14.93 22.14 (±3.1) 67.43 164.88 214 (±12.5) 77.05
Characteristic Sample
A-II A-III B-I C-II C-III
Elastic modulus (GPa)
EV 8.46 10.54 20.81 9.31 14.93
SV 14.66 ± 0.7 18.43 ± 1.1 30.42 ± 2.2 17.38 ± 1.4 22.14 ± 3.1
EV/SV 57.71 57.19 68.41 53.57 67.43
Yield strength (MPa)
EV 81.21 126.56 205.32 105.27 164.88
SV 159 ± 6.8 180 ± 12.2 281 ± 27.3 178 ± 9.7 214 ± 12.5
EV/SV 51.08 70.31 73.08 59.14 77.05
Abbreviations: EV, experimental value; SV, simulation value.

Table 8. Three-point bending experimental results
Characteristic Sample
A-II A-III B-I C-II C-III
Flexural modulus (GPa) 8.36 ± 0.7 10.26 ± 0.5 13.67 ± 1.5 9.71 ± 0.9 11.67 ± 1.1
Bending strength (MPa) 325.71 ± 18.9 410.97 ± 23.5 603.76 ± 22.6 436.92 ± 19.3 468.52 ± 20.9

4. Conclusion (ii) In comparison to the uniform C-III with a
relative density of 45%, B-I exhibited significant
In this study, we investigated the mechanical properties improvements in mechanical performance,
of functionally graded TPMS structures manufactured encompassing a 39.38% increase in elastic modulus
using SLM with Ti6Al4V powder. These structures were (reaching 30.42 GPa), a 24.53% increase in yield
then applied to the framework design of IFCDs. The main strength (reaching 205.32 MPa), a 28.87% increase
findings of this study can be summarized as follows: in flexural strength (reaching 603.76 MPa), and an
(i) Finite element analysis (FEA) revealed that the impact toughness of 7.95 J/cm² (higher than that
2
B-I exhibited a more uniform stress distribution of the homogeneous sample, i.e., 6.96 J/cm ). All
during the compression process and demonstrated samples exhibited a similar failure mode during
significant mechanical performance and energy compression, forming 45° shear bands.
absorption advantages compared to other models. (iii) In comparison to a hollow IFCD framework of
In comparison to the homogeneous model, B-I the same weight, the functionally graded IFCD
displayed a 23.8% increase in yield strength, a 27.3% framework not only met the requirements for
increase in elastic modulus, and a 29.1% increase in masticatory function but also exhibited superior
energy absorption capacity. mechanical performance, particularly in the molar

Volume 10 Issue 5 (2024) 271 doi: 10.36922/ijb.3453