Page 34 - IJB-9-4

International Journal of Bioprinting Lattice-Solid hybrid 3D printing for artificial implant

cooling rates of the mesh structures, thereby increasing the Writing – original draft: Jong Woong Park, Eunhyeok Seo,
tensile strength of the specimen. In addition, the results Hyokyung Sung, Im Doo Jung
of the fractographic analysis of P- and S-type specimens Writing – review & editing: Jong Woong Park, Eunhyeok
with the same mesh volume fraction indicate that the high Seo, Hyun Guy Kang, Hyokyung Sung, Im Doo Jung
strength of the S-type specimen was achieved by the large
volume fraction of the stage 1 area, where deep and clear Ethics approval and consent to participate
dimples were observed. Regarding the patient presented in Figure 1, this study

Through patient-specific orthopedic implants with protocol has been approved by the institutional review
an optimized volume fraction of the lattice structure, board of National Cancer Center (NCC2017-0129). The
mechanical performance for repeated weight loading was present study was conducted according to the principles of
improved, and guidelines for implant design could be the Declaration of Helsinki. Written informed consent was
established. However, it is necessary to devise definitive obtained from a participant prior to inclusion in the study.
implant designs that are clinically safe, and thus provide
a range of clear volume fractions of lattice structures. Consent for publication
Moreover, further works on fatigue behavior upon repetitive Not applicable.
loads applied to the lower limbs are also necessary. These
results and continuous research can provide a better basis Availability of data
for effective enhancement of mechanical performance and
optimized safe designs. Not applicable.

Acknowledgments References

None. 1. Mankin H, Gebhardt M, Jennings L, et al., 1996, Long-term
results of allograft replacement in the management of bone
Funding tumors. Relat Res, 324:86–97.
This work was supported by the Technology Innovation 2. Wunder J, Leitch K, Griffin A, et al., 2001, Comparison
Program (grant no. 20017502) funded by the Ministry of two methods of reconstruction for primary malignant
tumors at the knee: A sequential cohort study. J Surg Oncol,
of Trade, Industry & Energy (MOTIE, Korea), the 77:89–99.
National Research Foundation of Korea (NRF) grant
funded by the Korea government (MSIT) (grant no. https://doi.org/10.1002/jso.1076
2021M2D2A1A01050059, 2020R1C1C1006214), and the 3. Jeon DG, Kim MS, Cho WH, et al., 2007, Pasteurized
research grant funded by the National Cancer Center of autograft for intercalary reconstruction. Clin Orthop Relat
the Republic of Korea (grant no. 2110270). Res, 456:203–210.
https://doi.org/10.1097/BLO.0b013e31802e7ec8
Conflict of interest
4. Jeon DG, Song WS, Cho WH, et al., 2014, Overlapping
The authors declare that they have no known competing allograft for primary or salvage bone tumor reconstruction.
financial interests or personal relationships that could have J Surg Oncol, 110:366–371.
appeared to influence the work reported in this paper. https://doi.org/10.1002/jso.23669
5. Shusteff M, Browar AEM, Kelly EW, et al., 2017, One-step
Author contributions volumetric additive manufacturing of complex polymer
Conceptualization: Jong Woong Park, Eunhyeok Seo, structures. Sci Adv, 3:eaao5496.
Hyokyung Sung, Im Doo Jung https://doi.org/10.1126/sciadv.aao5496
Formal analysis: Jong Woong Park, Eunhyeok Seo, Haeum 6. Zhang D, Qiu D, Gibson MA, et al., 2019, Additive
Park, Ye Chan Shin, Hyokyung Sung, Im Doo Jung manufacturing of ultrafine-grained high-strength titanium
Funding acquisition: Hyokyung Sung, Im Doo Jung alloys. Nature, 576:91–95.
Investigation: Jong Woong Park, Eunhyeok Seo, Haeum https://doi.org/10.1038/s41586-019-1783-1
Park, Ye Chan Shin
Methodology: Haeum Park, Ye Chan Shin, Hyun Guy Kang 7. Jung ID, Choe J, Yun J, et al., 2019, Dual speed laser re-
Supervision: Hyokyung Sung, Im Doo Jung melting for high densification in H13 tool steel metal 3D
Visualization: Jong Woong Park, Eunhyeok Seo, Hyun Guy printing. Arch Metall Mater, 64(2):571–578.
Kang https://doi.org/10.24425/amm.2021.136388

Volume 9 Issue 4 (2023) 26 https://doi.org/10.18063/ijb.716