Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 117, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmbbm.2021.104415
Keywords
Selective laser melting; Parametric modeling; Topology optimization; Shape optimization; Data processing
Funding
- Henan Provincial Science and Technology Department Project [212102310859]
- Start-up Funds for High Level Talents of Zhoukou Normal University [ZKNUC 72019]
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By combining reverse and positive methods for three-dimensional reconstruction, optimizing the design and using Selective Laser Melting technology for direct forming, high-performance personalized biomechanical fixation-type tibial implants were achieved with reduced weight, increased mechanical properties, and a more uniform stress distribution.
To obtain high performance (matching, mechanical properties, and biocompatibility) of personalized biomechanical fixation-type tibial implants, three-dimensional reconstruction was performed using a combination of reverse and positive methods. The implant design was optimized using a topological optimization method, the shape-optimized B-unit structure was filled, and the performance was evaluated for implants prepared by direct forming technology of Selective Laser Melting (3D Printing). The results show obviously reduced weight of the tibial implant, increased stress and displacement, yet with a more uniform distribution. The mechanical properties of the tibial implant were lower than those of the B-units, the weight was lighter, and the stress distribution was more uniform. The surface of the tibial implants prepared by SLM appeared clean and bright, the metal texture was good, the structure between the porous struts was clear, the surface had low powder adhesion, the lap joint was good, and no obvious warping deformation or forming defects were observed. The results of this study provide a foundation for the direct application of high performance personalized biofixation implants.
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