Surface treatment method for surgical implant and surgical implant
AssigneeSugino Machine Limited
InventorTaiki Matsui
Life of this patent
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Abstract
Provided is a surface treatment method for a surgical implant that improves fatigue strength of the surgical implant while maintaining the microscopic surface structure of the surgical implant. A surface treatment method for a surgical implant, including: placing an additive manufactured surgical implant in a processing liquid, the surgical implant including a microscopic surface structure having a complete penetration area and an incomplete penetration area; and causing a nozzle immersed in the processing liquid to eject a cavitation jet of the processing liquid to the surgical implant to remove the incomplete penetration area remaining on a surface of the surgical implant and apply a compressive residual stress to the surface of the surgical implant.
Claims10
A surface treatment method for a surgical implant, the method comprising:
- placing an additive manufactured surgical implant in a processing liquid, the surgical implant including a microscopic spherical structure having a complete penetration area and an incomplete penetration area, the microscopic spherical structure including
- a spherical portion,
- a substrate, and
- a base portion connecting the spherical portion and the substrate;
- and
- causing a nozzle immersed in the processing liquid to eject a cavitation jet of the processing liquid to the surgical implant to remove the incomplete penetration area remaining on a surface of the surgical implant while maintaining the structure of the complete penetration area and apply a compressive residual stress to the surface of the surgical implant.
Dependencies are inferred from the claim text.