Surface functionalization of PEEK with silicon nitride.

Published on Jan 1, 2021in Biomedical Materials3.174
· DOI :10.1088/1748-605X/ABB6B1
Francesco Boschetto9
Estimated H-index: 9
Elia Marin19
Estimated H-index: 19
+ 8 AuthorsGiuseppe Pezzotti37
Estimated H-index: 37
(Kyoto Institute of Technology)
Surface roughness, bioactivity, and antibacterial properties are desirable in skeletal implants. We hot-pressed a mix of particulate sodium chloride (NaCl) salt and silicon nitride (β-Si3N4) onto the surface of bulk PEEK. NaCl grains were removed by leaching in water, resulting in a porous PEEK surface embedded with ~15 vol.% β-Si3N4 particles. This functionalized surface showed the osteogenic and antibacterial properties previously reported in bulk silicon nitride implants. Surface enhancement of PEEK with β-Si3N4 could improve the performance of spinal fusion cages, by facilitating arthrodesis and resisting bacteria.
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