Stress-dependent design and optimization methodology of gradient porous implant and application in femoral stem

Abstract

Gradient porous structure made by additive manufacturing (AM) technology is potential to improve the long-term stability of orthopaedic implants through bone ingrowth while maintaining mechanical safety. In this study, a parametrical optimization methodology for the customized gradient porous implants was developed based on a stress-dependent design algorithm. Clinical requirements and manufacturing capabilities of AM were considered in the design procedure. A femoral stem with a minimum bone loss proportion of 2.4% by optimizing the control parameters. This study provided a feasible and flexible design approach for the customized implant with gradient porous structure or material components.

Keywords:

• Gradient porous implant
• elastic modulus
• finite element analysis
• customized implant
• additive manufacturing

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The work was supported by the National Key R&D Program of China [2018YFE0207900], Key R&D Program of Guangdong Province [2018B090906001], China Postdoctoral Science Foundation [2020M683458], Key R&D Program of Ningxia Province [2020BCH01001], the Natural Science Basic Research Program of ShaanXi Province [grant number 2022JQ-378], the Program of the National Natural Science Foundation of China [51835010], the Fundamental Research Funds for the Central Universities [XZY012021007] and the Youth Innovation Team of Shaanxi Universities.