Fabrication of Functionally Graded Biomedical Implants by Additive Manufacturing and Post Processing to Enhance Surface Quality

Interdisciplinary Areas: Engineering-Medicine, Future Manufacturing

Project Description

Herein, we seek to produce a porous structure on the upper surface of the acetabular cup to improve sustainability and biocompatibility by reducing stress shielding and promoting osseointegration. A smooth uniform surface finish is required on the inner portion of the acetabular cup to improve the wear resistance of the biomaterial during its tribological interaction. Powder Bed Fusion (PBF) will be used to fabricate the functionally graded acetabular cup. To enhance the surface quality of the inner surface of the acetabular cup, Magnetorheological Fluid Assisted Finishing (MFAF) will be implemented. MFAF is an advanced surface finishing operation that utilizes the rheological properties of the Magnetorheological (MR) fluid to produce a mirror-like polished surface without altering the surface quality of the fabricated part. With more than 500,000 total hip replacements occurring in the United States each year and the total global market value of $5.9 billion (2021), there is an enormous opportunity to improve the functional and clinical outcomes of patients by utilizing this novel medical device manufacturing technology.


Start Date

May 1, 2024


Postdoc Qualifications

An individual who have worked on bioimplant fabrication and characterization. Experiences and knowledge in relevant manufacturing processes of fabricating bioimplants and its characterization methods would be desirable.



Yung C. Shin, ME
Hyowon Hugh Lee, BME


Short Bibliography

Lee, J., Akin, S., Walsh, J.R., Jun, M.B.G., Lee, H., Shin, Y.C., “A novel Nitinol structure with functionally gradient pure titanium layers and biomaterial coatings for orthopedic implant applications”, Progress in Additive Manufacturing, in review.
Lee, J.W. and Shin, Y.C., "Molecular Dynamics Study of Bulk Properties of Polycrystalline NiTi", Metals 2021, 11, 1237.
Lee, J.W. and Shin, Y.C., "Effects of Composition and Post Heat Treatment on Shape Memory Characteristics and Mechanical Properties for Laser Direct Deposited Nitinol", Lasers in Manufacturing and Materials Processing, March 2019, Volume 6, Issue 1, pp 41-58.
Halani, P. and Shin, Y.C., “In-situ Synthesis and Characterization of Shape Memory Alloy- Nitinol by Laser Direct Deposition”, Metallurgical and Materials Transactions, A. Volume 43, Number 2, Feb. 2012, 650-657.