Design, Optimization, and Evaluation of Additively Manufactured Vintiles Cellular Structure for Acetabular Cup Implant

Processes

Jia-En Chen¹  Aamer Nazir²  Jeng-Ywan Jeng²  KalayuMekonen Abate² 

[1] Department of Biomedical Engineering, National Defense Medical Center, Taipei 11490, Taiwan;High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, 43, Sec.4, Keelung Road, Taipei 106, Taiwan;

关键词: cellular structure;    acetabular cup;    cellular implant;    additive manufacturing;    finite element analysis;    mechanical property;    design and optimization;   

DOI  :  10.3390/pr8010025

来源: DOAJ

【 摘 要 】

Cellular materials with very highly regulated micro-architectures are promising applicant materials for orthopedic medical uses while requiring implants or substituting for bone due to their ability to promote increased cell proliferation and osseointegration. This study focuses on the design of an acetabular cup (AC) cellular implant which was built using a vintiles cellular structure with an internal porosity of 56−87.9% and internal pore dimensions in the range of 600−1200 μm. The AC implant was then optimized for improving mechanical performance to reduce stress shielding by adjusting the porosity to produce stiffness (elastic modulus) to match with the bone, and allowing for bone cell ingrowth. The optimized and non-optimized AC cellular implant was fabricated using the SLM additive manufacturing process. Simulation (finite element analysis, FEA) was carried out and all cellular implants are finally tested under static loading conditions. The result showed that on the finite element model of an optimized implant, cellular has shown 69% higher stiffness than non-optimized. It has been confirmed by experimental work shown that the optimized cellular implant has a 71% higher ultimate compressive strength than the non-optimized counterpart. Finally, we developed an AC implant with mechanical performance adequately close to that of human bone.

【 授权许可】

Unknown